VERIFIED(Source-Verified)

C10100 Oxygen-Free Electronic (OFE) Copper

Primary Designation:UNS C10100

Aliases:

Oxygen-Free ElectronicOFE CopperC10100

Mat Grades internal verification confirms source-backed fidelity and data integrity. It does not constitute external certification or guaranteed lot conformity. Read engineering disclaimer →

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Data Completeness:10 composition elements and 165 condition-specific property values cataloged.

Omitted fields represent unverified properties. "Missing is better than invented."

Key Engineering Properties

Representative source rows, qualified by their reported conditions. Inspect the tables below for all values, limits, and source notes.

Density

8.941 g/cm³TYPICAL · at 20 °C

Electrical Conductivity

101 % IACSTYPICAL · at 20 °C

Thermal Conductivity

391.15 W/(m·K)TYPICAL · at 20 °C

Specific Heat Capacity

385.2 J/(kg·K)TYPICAL · at 20 °C

Melting Range (Solidus / Liquidus)

1082.8 – 1082.8 °C1981.0 – 1981.0 °F

Solidus: 1082.8°C | Liquidus: 1082.8°C

Composition Excerpt

Cu ≥ 99.99 wt%Copper (min)

Standard Elemental Basis: MIN

Engineering Summary

UNS C10100 Oxygen-Free Electronic (OFE) Copper is premium 99.99% pure unalloyed copper produced by vacuum induction melting with oxygen controlled below 5 ppm (0.0005%). It provides minimum 101% IACS electrical conductivity and complete immunity to hydrogen embrittlement during high-temperature brazing and vacuum tube glass-to-metal sealing.

C10100 Oxygen-Free Electronic (OFE) Copper Documented Applications

›Anodes for Vacuum Tubes: Conductivity (Thermal)
›Anodes for Vacuum Tubes: Corrosion Resistance
›Automotive Rectifiers: Conductivity (Thermal)
›Automotive: Automotive Rectifiers
›Bus Bars: Conductivity (Electrical)
›Bus Bars: Welding Characteristics
›Bus Conductors: Conductivity (Electrical)
›Bus Conductors: Conductivity (Thermal)
›Bus Conductors: Corrosion Resistance
›Bus Conductors: Solderability
›Coaxial Cable: Conductivity (Electrical)
›Coaxial Tube: Conductivity (Electrical)

Recognized Aliases

Source-backed commercial trade name and short designations cataloged in canonical data.

Oxygen-Free ElectronicOFE CopperC10100

C10100 Oxygen-Free Electronic (OFE) Copper Specifications & Designations

Standard Designations & Applicable Specifications — Semantically classified designations distinguishing primary standard identifiers, commercial trade names, and applicable specification references.

Direct Standard DesignationsDIRECT DESIGNATION

2 Primary Identifiers

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System	Identifier	Standard System Name	Classification Notes & Provenance
UNSPRIMARY	C10100	Unified Numbering System	Unified Numbering System standard designation for copper alloys (CDA / SAE / ASTM)Ref: CDA UNS Standard Designations Register (C10100)
CDA	Alloy 101	Copper Development Association Alloy Number	CDA three-digit legacy designationRef: CDA UNS Standard Designations Register (C10100)

Recognized Commercial Aliases & Trade NamesCOMMON ALIAS

4 Listed

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Recognized Name / Alias	Classification	Technical Usage & Context
Oxygen-Free Electronic Copper	Standard Commercial Name	CDA Standard Commercial Name
Oxygen-Free Electronic	Commercial Alias	Colloquial or commercial industry synonym
OFE Copper	Commercial Alias	Colloquial or commercial industry synonym
C10100	Commercial Alias	Colloquial or commercial industry synonym

Applicable Specifications & Product Form ReferencesSPECIFICATION REFERENCE

12 Applicable Standards

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Standards Body	Specification Code	Specification Title / Scope	Relationship Type
ASTM	ASTM B577	Detection of Cuperous Oxide (Hydrogen Embrittlement Susceptibility) in Copper	Specification Reference
ASTM	ASTM B224	Standard Classification of Coppers	Specification Reference
ASTM	ASTM F68	OXYGEN-FREE COPPER IN WROUGHT FORMS FOR ELECTRON DEVICES	Specification Reference
ASTM	ASTM B152/B152M	COPPER SHEET, STRIP, PLATE AND ROLLED BAR	Specification Reference
ASTM	ASTM B187/B187M	COPPER BUS BAR, ROD AND SHAPES AND GENERAL PURPOSE ROD, BAR AND SHAPES	Specification Reference
ASME	ASME SB187	COPPER BUS BAR, ROD AND SHAPES AND GENERAL PURPOSE ROD, BAR AND SHAPES	Specification Reference
ASME	ASME SB152	COPPER SHEET, STRIP, PLATE, AND ROLLED BAR	Specification Reference
ASTM	ASTM B451	COPPER FOIL, STRIP AND SHEET FOR PRINTED CIRCUITS AND CARRIER TAPES	Specification Reference
ASTM	ASTM B432	COPPER AND COPPER ALLOY CLAD STEEL PLATE	Specification Reference
ASTM	ASTM B170	OXYGEN-FREE ELECTROLYTIC COPPER-REFINERY SHAPES	Specification Reference
ASTM	ASTM B188	SEAMLESS COPPER BUS PIPE AND TUBE	Specification Reference
ASME	ASME SB111	COPPER AND COPPER ALLOY SEAMLESS CONDENSER TUBES & FERRULE STOCK	Specification Reference

Engineering Notice: Applicable specifications establish manufacturing requirements, dimensional tolerances, and test criteria for specific product forms (e.g. bus bar, wire, plate, pipe). They represent applicable technical standards, not alternative or equivalent alloy grades.

C10100 Oxygen-Free Electronic (OFE) Copper Chemical Composition

Chemical Composition (Weight %) — Elemental limits and values from the cited source. Preserves exact semantic limits (minimums, maximums, and ranges).

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Element	Symbol	Atomic No.	Semantic Basis	Specified Value	Unit	Metallurgical Notes & Qualification	Data Status
Copper	Cu	29	MINIMUM	≥ 99.99	wt%	CDA chemical composition specification limits for C10100: min 99.99 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Lead	Pb	82	MAXIMUM	≤ 0.00	wt%	CDA chemical composition specification limits for C10100: max 0.0005 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Zinc	Zn	30	MAXIMUM	≤ 0.00	wt%	CDA chemical composition specification limits for C10100: max 0.0001 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Iron	Fe	26	MAXIMUM	≤ 0.00	wt%	CDA chemical composition specification limits for C10100: max 0.001 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Phosphorus	P	15	MAXIMUM	≤ 0.00	wt%	CDA chemical composition specification limits for C10100: max 0.0003 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Silver	Ag	47	MAXIMUM	≤ 0.00	wt%	CDA chemical composition specification limits for C10100: max 0.0025 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Arsenic	As	33	MAXIMUM	≤ 0.00	wt%	CDA chemical composition specification limits for C10100: max 0.0005 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Oxygen	O	8	MAXIMUM	≤ 0.00	wt%	CDA chemical composition specification limits for C10100: max 0.0005 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Antimony	Sb	51	MAXIMUM	≤ 0.00	wt%	CDA chemical composition specification limits for C10100: max 0.0004 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Tellurium	Te	52	MAXIMUM	≤ 0.00	wt%	CDA chemical composition specification limits for C10100: max 0.0002 wt%.Ref: Copper Development Association (CDA)	VERIFIED

* Elemental percentages are expressed in weight percent (wt%). Values represent applicable specification limits. Unspecified trace elements are not fabricated or assumed.Preserves exact semantic basis

Property Display UnitsSwitch between Canonical SI and Source / US Customary units:

C10100 Oxygen-Free Electronic (OFE) Copper Physical Properties

Source-specific physical properties. Test temperatures are shown only where reported.

1 Parameters

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Property Parameter	Canonical SI Value	Semantic Basis	Test Temperature / Context Range	Source Raw Reference	Source Reference	Status
Density	8.941 g/cm³	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Density 0.323 lb/cu in. at 68°F (8.941 g/cm³ at 20°C)	0.323 lb/cu in. at 68°F	Copper Development Association Inc.	VERIFIED

C10100 Oxygen-Free Electronic (OFE) Copper Thermal & Thermodynamic Properties

Phase change temperatures, thermal conductivity, specific heat, mean coefficients of thermal expansion across standardized temperature ranges, and recommended thermal processing windows.

9 Parameters

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Property Parameter	Canonical SI Value	Semantic Basis	Test Temperature / Context Range	Source Raw Reference	Source Reference	Status
Liquidus Temperature	1082.8 °C	TYPICAL	CDA Physical Properties: Liquidus temperature 1981.0 °F (1082.8 °C)	1981.0 °F	Copper Development Association Inc.	VERIFIED
Solidus Temperature	1082.8 °C	TYPICAL	CDA Physical Properties: Solidus temperature 1981.0 °F (1082.8 °C)	1981.0 °F	Copper Development Association Inc.	VERIFIED
Thermal Conductivity	391.15 W/(m·K)	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Thermal conductivity 226.0 Btu/(ft·hr·°F) (391.15 W/(m·K) at 20°C)	226.0 Btu/ sq ft/ ft hr/ °F at 68°F	Copper Development Association Inc.	VERIFIED
Coefficient of Thermal Expansion (CTE)	16.92 µm/(m·K)	TYPICAL	CDA Physical Properties: CTE 9.4 µin/(in·°F) (16.92 µm/(m·K)) over range 68-21210°F	9.4 10^-6 per °F	Copper Development Association Inc.	VERIFIED
Coefficient of Thermal Expansion (CTE)	17.28 µm/(m·K)	TYPICAL	CDA Physical Properties: CTE 9.6 µin/(in·°F) (17.28 µm/(m·K)) over range 68-39210°F	9.6 10^-6 per °F	Copper Development Association Inc.	VERIFIED
Coefficient of Thermal Expansion (CTE)	17.64 µm/(m·K)	TYPICAL	CDA Physical Properties: CTE 9.8 µin/(in·°F) (17.64 µm/(m·K)) over range 68-57210°F	9.8 10^-6 per °F	Copper Development Association Inc.	VERIFIED
Specific Heat Capacity	385.2 J/(kg·K)	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Specific heat 0.092 Btu/(lb·°F) (385.2 J/(kg·K))	0.092 Btu/ lb /°F at 68°F	Copper Development Association Inc.	VERIFIED
Annealing Temperature Range	371.1 – 648.9 °C	RANGE	CDA Thermal Treatments: Annealing temperature range 700 - 1200°F (371.1 - 648.9°C)	700 – 1200 °F	Copper Development Association Inc.	VERIFIED
Hot Working Temperature Range	760 – 871.1 °C	RANGE	CDA Thermal Treatments: Hot working range 1400 - 1600°F (760.0 - 871.1°C)	1400 – 1600 °F	Copper Development Association Inc.	VERIFIED

C10100 Oxygen-Free Electronic (OFE) Copper Electrical Properties

Electrical conductivity and resistivity in their reported units and conditions.

1 Parameters

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Property Parameter	Canonical SI Value	Semantic Basis	Test Temperature / Context Range	Source Raw Reference	Source Reference	Status
Electrical Conductivity	101 % IACS	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Volume conductivity 101.0 % IACS at 68°F (20°C)	101.0 % IACS at 68°F	Copper Development Association Inc.	VERIFIED

C10100 Oxygen-Free Electronic (OFE) Copper Mechanical Properties

Contextual Mechanical Properties & Tempers: Engineering strength, ductility, and hardness values grouped by product form, temper, and section thickness. Mechanical properties are contextual and not isotropic averages.

Elastic & Baseline Mechanical ConstantsSource-specific measurement conditions

Modulus of Elasticity (Tension)

117.2 GPa

CDA Physical Properties: Elastic modulus in tension 17000.0 ksi (117.2 GPa)

Modulus of Rigidity

44126.4 MPa

CDA Physical Properties: Shear modulus 6400.0 ksi (44126.4 MPa)

Machinability Rating

20 %

CDA Fabrication Properties: Rating relative to Free-Cutting Brass (C36000 = 100%).

Forgeability Rating

65 —

CDA Fabrication Properties: Relative forgeability rating.

Product Form:

Temper / Condition:

Showing 60 of 60 conditions

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Product Form	Temper / Condition	Section Size	Tensile (UTS)	Yield Strength	Elongation	Shear Strength	Fatigue Strength	Hardness (Scales Preserved)	Status
Flat Products	1/2 Hard (H02) · 20 °C Source values and qualifiers Tensile Strength: 289.6 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 248.2 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 14 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H02	0.04	289.6 MPa	248.2 MPa	14 %	—	—	—	VERIFIED
Flat Products	1/2 Hard (H02) Source values and qualifiers Rockwell B Hardness: 40 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell F Hardness: 84 HRF (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 50 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Fatigue Strength: 89.6 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; 10^8 cycles endurance limitCopper Development Association (CDA) — H02	0.04	—	—	—	—	89.6 MPa	40 HRB84 HRF50 HR30T	VERIFIED
Flat Products	1/4 Hard (H01) · 20 °C Source values and qualifiers Tensile Strength: 262 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 206.8 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 25 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H01	0.04	262 MPa	206.8 MPa	25 %	—	—	—	VERIFIED
Flat Products	1/4 Hard (H01) Source values and qualifiers Rockwell B Hardness: 25 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell F Hardness: 70 HRF (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 36 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H01	0.04	—	—	—	—	—	25 HRB70 HRF36 HR30T	VERIFIED
Flat Products	1/4 Hard (H01) · 20 °C Source values and qualifiers Tensile Strength: 262 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 206.8 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 35 % (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — H01	0.25	262 MPa	206.8 MPa	35 %	—	—	—	VERIFIED
Flat Products	1/4 Hard (H01) Source values and qualifiers Rockwell B Hardness: 25 HRB (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — Rockwell F Hardness: 70 HRF (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — H01	0.25	—	—	—	—	—	25 HRB70 HRF	VERIFIED
Flat Products	1/8 Hard (H00) · 20 °C Source values and qualifiers Tensile Strength: 248.2 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 193.1 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 40 % (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — H00	0.25	248.2 MPa	193.1 MPa	40 %	—	—	—	VERIFIED
Flat Products	1/8 Hard (H00) Source values and qualifiers Rockwell B Hardness: 10 HRB (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — Rockwell F Hardness: 60 HRF (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — H00	0.25	—	—	—	—	—	10 HRB60 HRF	VERIFIED
Flat Products	1/8 Hard (H00) · 20 °C Source values and qualifiers Tensile Strength: 248.2 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 193.1 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 30 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H00	0.04	248.2 MPa	193.1 MPa	30 %	—	—	—	VERIFIED
Flat Products	1/8 Hard (H00) Source values and qualifiers Rockwell B Hardness: 10 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell F Hardness: 60 HRF (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 25 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H00	0.04	—	—	—	—	—	10 HRB60 HRF25 HR30T	VERIFIED
Flat Products	As Hot Rolled (M20) · 20 °C Source values and qualifiers Tensile Strength: 234.4 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 68.9 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 45 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — M20	0.04	234.4 MPa	68.9 MPa	45 %	—	—	—	VERIFIED
Flat Products	As Hot Rolled (M20) Source values and qualifiers Rockwell F Hardness: 45 HRF (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — M20	0.04	—	—	—	—	—	45 HRF	VERIFIED
Flat Products	As Hot Rolled (M20) · 20 °C Source values and qualifiers Tensile Strength: 220.6 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 68.9 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 50 % (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — M20	0.25	220.6 MPa	68.9 MPa	50 %	—	—	—	VERIFIED
Flat Products	As Hot Rolled (M20) Source values and qualifiers Rockwell F Hardness: 40 HRF (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — M20	0.25	—	—	—	—	—	40 HRF	VERIFIED
Flat Products	Extra Spring (H10) · 20 °C Source values and qualifiers Tensile Strength: 393 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 365.4 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 4 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H10	0.04	393 MPa	365.4 MPa	4 %	—	—	—	VERIFIED
Flat Products	Extra Spring (H10) Source values and qualifiers Rockwell B Hardness: 62 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell F Hardness: 95 HRF (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 64 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H10	0.04	—	—	—	—	—	62 HRB95 HRF64 HR30T	VERIFIED
Flat Products	Hard (H04) · 20 °C Source values and qualifiers Tensile Strength: 379.2 MPa (TYPICAL)Section Size: .08; Section Size: .08 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 310.3 MPa (TYPICAL)Section Size: .08; Section Size: .08 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 6 % (TYPICAL)Section Size: .08; Section Size: .08 inCopper Development Association (CDA) — H04	.08	379.2 MPa	310.3 MPa	6 %	—	—	—	VERIFIED
Flat Products	Hard (H04) · 20 °C Source values and qualifiers Tensile Strength: 344.7 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 310.3 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 12 % (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — H04	0.25	344.7 MPa	310.3 MPa	12 %	—	—	—	VERIFIED
Flat Products	Hard (H04) Source values and qualifiers Rockwell B Hardness: 50 HRB (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — Rockwell F Hardness: 90 HRF (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — H04	0.25	—	—	—	—	—	50 HRB90 HRF	VERIFIED
Flat Products	Hard (H04) · 20 °C Source values and qualifiers Tensile Strength: 344.7 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 310.3 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 6 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H04	0.04	344.7 MPa	310.3 MPa	6 %	—	—	—	VERIFIED
Flat Products	Hard (H04) Source values and qualifiers Rockwell B Hardness: 50 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell F Hardness: 90 HRF (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 57 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Fatigue Strength: 89.6 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; 10^8 cycles endurance limitCopper Development Association (CDA) — H04	0.04	—	—	—	—	89.6 MPa	50 HRB90 HRF57 HR30T	VERIFIED
Flat Products	Hard (H04) · 20 °C Source values and qualifiers Tensile Strength: 310.3 MPa (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 275.8 MPa (TYPICAL)Section Size: 1; Section Size: 1 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 20 % (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — H04	1	310.3 MPa	275.8 MPa	20 %	—	—	—	VERIFIED
Flat Products	Hard (H04) Source values and qualifiers Rockwell B Hardness: 45 HRB (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — Rockwell F Hardness: 85 HRF (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — H04	1	—	—	—	—	—	45 HRB85 HRF	VERIFIED
Flat Products	Nominal Grain Size 0.025 mm (OS025) · 20 °C Source values and qualifiers Tensile Strength: 234.4 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 75.8 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 45 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — OS025	0.04	234.4 MPa	75.8 MPa	45 %	—	—	—	VERIFIED
Flat Products	Nominal Grain Size 0.025 mm (OS025) Source values and qualifiers Rockwell F Hardness: 45 HRF (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Fatigue Strength: 75.8 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; 10^8 cycles endurance limitCopper Development Association (CDA) — OS025	0.04	—	—	—	—	75.8 MPa	45 HRF	VERIFIED
Flat Products	Nominal Grain Size 0.050 mm (OS050) · 20 °C Source values and qualifiers Tensile Strength: 220.6 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 68.9 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 45 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — OS050	0.04	220.6 MPa	68.9 MPa	45 %	—	—	—	VERIFIED
Flat Products	Nominal Grain Size 0.050 mm (OS050) Source values and qualifiers Rockwell F Hardness: 40 HRF (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — OS050	0.04	—	—	—	—	—	40 HRF	VERIFIED
Flat Products	Nominal Grain Size 0.050 mm (OS050) · 20 °C Source values and qualifiers Tensile Strength: 220.6 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 68.9 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 50 % (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — OS050	0.25	220.6 MPa	68.9 MPa	50 %	—	—	—	VERIFIED
Flat Products	Nominal Grain Size 0.050 mm (OS050) Source values and qualifiers Rockwell F Hardness: 40 HRF (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — OS050	0.25	—	—	—	—	—	40 HRF	VERIFIED
Flat Products	Spring (H08) · 20 °C Source values and qualifiers Tensile Strength: 379.2 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 344.7 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 4 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H08	0.04	379.2 MPa	344.7 MPa	4 %	—	—	—	VERIFIED
Flat Products	Spring (H08) Source values and qualifiers Rockwell B Hardness: 60 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell F Hardness: 94 HRF (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 63 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Fatigue Strength: 96.5 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; 10^8 cycles endurance limitCopper Development Association (CDA) — H08	0.04	—	—	—	—	96.5 MPa	60 HRB94 HRF63 HR30T	VERIFIED
Rod	As Hot Rolled (M20) · 20 °C Source values and qualifiers Tensile Strength: 220.6 MPa (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 68.9 MPa (TYPICAL)Section Size: 1; Section Size: 1 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 55 % (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — M20	1	220.6 MPa	68.9 MPa	55 %	—	—	—	VERIFIED
Rod	As Hot Rolled (M20) Source values and qualifiers Rockwell F Hardness: 40 HRF (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — Shear Strength: 151.7 MPa (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — M20	1	—	—	—	151.7 MPa	—	40 HRF	VERIFIED
Rod	Hard (H04) · 20 °C Source values and qualifiers Tensile Strength: 379.2 MPa (TYPICAL)Section Size: 0.25; Cold Work: 40%; Section Size: 0.25 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 344.7 MPa (TYPICAL)Section Size: 0.25; Cold Work: 40%; Section Size: 0.25 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 10 % (TYPICAL)Section Size: 0.25; Cold Work: 40%; Section Size: 0.25 inCopper Development Association (CDA) — H04	0.25	379.2 MPa	344.7 MPa	10 %	—	—	—	VERIFIED
Rod	Hard (H04) Source values and qualifiers Rockwell B Hardness: 60 HRB (TYPICAL)Section Size: 0.25; Cold Work: 40%; Section Size: 0.25 inCopper Development Association (CDA) — Rockwell F Hardness: 94 HRF (TYPICAL)Section Size: 0.25; Cold Work: 40%; Section Size: 0.25 inCopper Development Association (CDA) — H04	0.25	—	—	—	—	—	60 HRB94 HRF	VERIFIED
Rod	Hard (H04) · 20 °C Source values and qualifiers Tensile Strength: 310.3 MPa (TYPICAL)Section Size: 2; Cold Work: 16%; Section Size: 2 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 275.8 MPa (TYPICAL)Section Size: 2; Cold Work: 16%; Section Size: 2 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 20 % (TYPICAL)Section Size: 2; Cold Work: 16%; Section Size: 2 inCopper Development Association (CDA) — H04	2	310.3 MPa	275.8 MPa	20 %	—	—	—	VERIFIED
Rod	Hard (H04) Source values and qualifiers Rockwell B Hardness: 45 HRB (TYPICAL)Section Size: 2; Cold Work: 16%; Section Size: 2 inCopper Development Association (CDA) — Rockwell F Hardness: 85 HRF (TYPICAL)Section Size: 2; Cold Work: 16%; Section Size: 2 inCopper Development Association (CDA) — H04	2	—	—	—	—	—	45 HRB85 HRF	VERIFIED
Rod	Hard (H04) · 20 °C Source values and qualifiers Tensile Strength: 330.9 MPa (TYPICAL)Section Size: 1; Cold Work: 35%; Section Size: 1 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 303.4 MPa (TYPICAL)Section Size: 1; Cold Work: 35%; Section Size: 1 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 16 % (TYPICAL)Section Size: 1; Cold Work: 35%; Section Size: 1 inCopper Development Association (CDA) — H04	1	330.9 MPa	303.4 MPa	16 %	—	—	—	VERIFIED
Rod	Hard (H04) Source values and qualifiers Rockwell B Hardness: 47 HRB (TYPICAL)Section Size: 1; Cold Work: 35%; Section Size: 1 inCopper Development Association (CDA) — Rockwell F Hardness: 87 HRF (TYPICAL)Section Size: 1; Cold Work: 35%; Section Size: 1 inCopper Development Association (CDA) — Fatigue Strength: 117.2 MPa (TYPICAL)Section Size: 1; Cold Work: 35%; Section Size: 1 in; 10^8 cycles endurance limitCopper Development Association (CDA) — H04	1	—	—	—	—	117.2 MPa	47 HRB87 HRF	VERIFIED
Rod	Nominal Grain Size 0.050 mm (OS050) · 20 °C Source values and qualifiers Tensile Strength: 220.6 MPa (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 68.9 MPa (TYPICAL)Section Size: 1; Section Size: 1 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 55 % (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — OS050	1	220.6 MPa	68.9 MPa	55 %	—	—	—	VERIFIED
Rod	Nominal Grain Size 0.050 mm (OS050) Source values and qualifiers Rockwell F Hardness: 40 HRF (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — OS050	1	—	—	—	—	—	40 HRF	VERIFIED
Shapes	As Hot Extruded (M30) · 20 °C Source values and qualifiers Tensile Strength: 220.6 MPa (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 68.9 MPa (TYPICAL)Section Size: 0.5; Section Size: 0.5 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 50 % (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — M30	0.5	220.6 MPa	68.9 MPa	50 %	—	—	—	VERIFIED
Shapes	As Hot Extruded (M30) Source values and qualifiers Rockwell F Hardness: 45 HRF (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — M30	0.5	—	—	—	—	—	45 HRF	VERIFIED
Shapes	As Hot Rolled (M20) · 20 °C Source values and qualifiers Tensile Strength: 220.6 MPa (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 68.9 MPa (TYPICAL)Section Size: 0.5; Section Size: 0.5 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 50 % (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — M20	0.5	220.6 MPa	68.9 MPa	50 %	—	—	—	VERIFIED
Shapes	As Hot Rolled (M20) Source values and qualifiers Rockwell F Hardness: 45 HRF (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — M20	0.5	—	—	—	—	—	45 HRF	VERIFIED
Shapes	Hard (H04) · 20 °C Source values and qualifiers Tensile Strength: 275.8 MPa (TYPICAL)Section Size: 0.5; Cold Work: 15%; Section Size: 0.5 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 220.6 MPa (TYPICAL)Section Size: 0.5; Cold Work: 15%; Section Size: 0.5 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 30 % (TYPICAL)Section Size: 0.5; Cold Work: 15%; Section Size: 0.5 inCopper Development Association (CDA) — H04	0.5	275.8 MPa	220.6 MPa	30 %	—	—	—	VERIFIED
Shapes	Hard (H04) Source values and qualifiers Rockwell B Hardness: 35 HRB (TYPICAL)Section Size: 0.5; Cold Work: 15%; Section Size: 0.5 inCopper Development Association (CDA) — H04	0.5	—	—	—	—	—	35 HRB	VERIFIED
Shapes	Nominal Grain Size 0.050 mm (OS050) · 20 °C Source values and qualifiers Tensile Strength: 220.6 MPa (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 68.9 MPa (TYPICAL)Section Size: 0.5; Section Size: 0.5 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 50 % (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — OS050	0.5	220.6 MPa	68.9 MPa	50 %	—	—	—	VERIFIED
Shapes	Nominal Grain Size 0.050 mm (OS050) Source values and qualifiers Rockwell F Hardness: 45 HRF (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — OS050	0.5	—	—	—	—	—	45 HRF	VERIFIED
Tube	Hard Drawn (H80) · 20 °C Source values and qualifiers Tensile Strength: 379.2 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 344.7 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 8 % (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — H80	0.065	379.2 MPa	344.7 MPa	8 %	—	—	—	VERIFIED
Tube	Hard Drawn (H80) Source values and qualifiers Rockwell B Hardness: 60 HRB (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — Rockwell F Hardness: 95 HRF (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — Rockwell 30T Hardness: 63 HR30T (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — H80	0.065	—	—	—	—	—	60 HRB95 HRF63 HR30T	VERIFIED
Tube	Light Drawn, Light Cold Rolled (H55) · 20 °C Source values and qualifiers Tensile Strength: 275.8 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 220.6 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 25 % (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — H55	0.065	275.8 MPa	220.6 MPa	25 %	—	—	—	VERIFIED
Tube	Light Drawn, Light Cold Rolled (H55) Source values and qualifiers Rockwell B Hardness: 35 HRB (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — Rockwell F Hardness: 77 HRF (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — Rockwell 30T Hardness: 45 HR30T (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — H55	0.065	—	—	—	—	—	35 HRB77 HRF45 HR30T	VERIFIED
Tube	Nominal Grain Size 0.025 mm (OS025) · 20 °C Source values and qualifiers Tensile Strength: 234.4 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 75.8 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 45 % (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — OS025	0.065	234.4 MPa	75.8 MPa	45 %	—	—	—	VERIFIED
Tube	Nominal Grain Size 0.025 mm (OS025) Source values and qualifiers Rockwell F Hardness: 45 HRF (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — OS025	0.065	—	—	—	—	—	45 HRF	VERIFIED
Tube	Nominal Grain Size 0.050 mm (OS050) · 20 °C Source values and qualifiers Tensile Strength: 220.6 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 68.9 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 45 % (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — OS050	0.065	220.6 MPa	68.9 MPa	45 %	—	—	—	VERIFIED
Tube	Nominal Grain Size 0.050 mm (OS050) Source values and qualifiers Rockwell F Hardness: 40 HRF (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — OS050	0.065	—	—	—	—	—	40 HRF	VERIFIED
Wire	Hard (H04) · 20 °C Source values and qualifiers Tensile Strength: 379.2 MPa (TYPICAL)Section Size: 0.08; Section Size: 0.08 inCopper Development Association (CDA) — Elongation: 1.5 % (TYPICAL)Section Size: 0.08; Section Size: 0.08 inCopper Development Association (CDA) — H04	0.08	379.2 MPa	—	1.5 %	—	—	—	VERIFIED
Wire	Nominal Grain Size 0.050 mm (OS050) · 20 °C Source values and qualifiers Tensile Strength: 241.3 MPa (TYPICAL)Section Size: 0.08; Section Size: 0.08 inCopper Development Association (CDA) — Elongation: 35 % (TYPICAL)Section Size: 0.08; Section Size: 0.08 inCopper Development Association (CDA) — OS050	0.08	241.3 MPa	—	35 %	—	—	—	VERIFIED
Wire	Spring (H08) · 20 °C Source values and qualifiers Tensile Strength: 455.1 MPa (TYPICAL)Section Size: 0.08; Section Size: 0.08 inCopper Development Association (CDA) — Elongation: 1.5 % (TYPICAL)Section Size: 0.08; Section Size: 0.08 inCopper Development Association (CDA) — H08	0.08	455.1 MPa	—	1.5 %	—	—	—	VERIFIED

Hardness Integrity Notice: Rockwell B (HRB), Rockwell F (HRF), and Superficial 30T (HR30T) scales are reported on their measured scales without cross-scale mathematical conversion.

Source: See fact-level citations

C10100 Oxygen-Free Electronic (OFE) Copper Processing & Fabrication

Machining, joining, forming, and thermal processing ratings cataloged from the cited authoritative technical reference.

Source: Copper Development Association (CDA)

Machinability

Machinability rating: 20% relative to free-cutting brass (C36000 = 100%). Forgeability rating: 65.

Weldability & Joining

Soldering: Excellent; Brazing: Excellent; Oxyacetylene Welding: Fair; Gas Shielded Arc Welding: Good; Coated Metal Arc Welding: Not Recommended; Spot Weld: Not Recommended; Seam Weld: Not Recommended; Butt Weld: Good

Heat Treatment & Working Ranges

Annealing temperature range: 371.1°C to 648.9°C (700°F - 1200°F). Hot working temperature range: 760.0°C to 871.1°C (1400°F - 1600°F).

Forming & Cold Working

Capacity for Being Cold Worked: Excellent. Capacity for Being Hot Formed: Excellent.

Practical Engineering & Fabrication Notes

By Mat Grades Editorial Desk · Updated 2026-11-14. Use alongside the specified product standard and supplier certificate.

Machining & shop-floor behavior

The cataloged machining note for C10100 Oxygen-Free Electronic (OFE) Copper states: Machinability rating: 20% relative to free-cutting brass (C36000 = 100%). Forgeability rating: 65. A relevant hardness example is Rockwell B Hardness: 40 HRB (typical; 1/2 Hard (H02), H02, Flat Products, 0.04). Use that supplied condition for a trial of the difficult feature. Record tool changes, burr removal, unclamped dimensions and accepted parts per hour. Relative machinability ratings from different reference scales should not be compared as if they were one common test.

Weldability, brazing & joining

The available joining assessment states: Soldering: Excellent; Brazing: Excellent; Oxyacetylene Welding: Fair; Gas Shielded Arc Welding: Good; Coated Metal Arc Welding: Not Recommended; Spot Weld: Not Recommended; Seam Weld: Not Recommended; Butt Weld: Good The first cataloged strength example is Tensile Strength: 289.6 MPa (typical; 1/2 Hard (H02), H02, Flat Products, 0.04; test temperature 20 °C). Assess the final part after joining or thermal processing. Include distortion, cleanup and inspection in the quotation. A material designation or favorable process rating is a starting point for qualification, not evidence that an untested joint meets the drawing.

Corrosion & service environment

Review the working fluid, cleaning agents and dissimilar-metal contacts as separate exposures. The word copper, brass or bronze is too broad to establish compatibility. A process rating does not qualify a pressure boundary, and a thermal-property measurement does not establish a continuous service-temperature limit. The recorded thermal example is Thermal Conductivity: 391.15 W/(m·K) (typical; ; test temperature 20 °C). State the exposure and inspection access in the design record so that a change of installation or cleaning method triggers a review. The selected composition entries are Cu minimum 99.99 wt%, Pb maximum 0.0005 wt%, Zn maximum 0.0001 wt%. Chemistry documents identity; it does not establish fluid compatibility.

Selection trade-offs & applications

Use UNS C10100, COMMERCIAL Oxygen-Free Electronic Copper, CDA Alloy 101 to identify the candidate, then specify the product form and delivered condition separately. The catalog lists Anodes for Vacuum Tubes: Conductivity (Thermal) as an application example. The related candidate C10200 Oxygen-Free (OF) Copper is linked for comparison; its close equivalent relationship must be checked before substitution. Compare the complete route through machining, joining, finish and inspection. Keep the certificate, required test location and acceptance criteria with the first-article record. A later change of grade, condition or source should be assessed against that same requirement.

Technical references: Copper Development Association (CDA); Copper Development Association (CDA)

C10100 Oxygen-Free Electronic (OFE) Copper Equivalent & Comparable Grades

Comparable Grades & Cross-References: Carefully classified cross-reference relationships for C10100 Oxygen-Free Electronic (OFE) Copper. Comparable does not mean equivalent.

Scroll horizontally for relationship classifications & comparisons

Related Material	Family	Relationship Classification	Metallurgical Notes & Differences	Status	Action
C10200 Oxygen-Free (OF) Copper	Copper Alloys	Close Equivalent	C10100 (OFE) is 99.99% pure with oxygen strictly <5 ppm, whereas C10200 (OF) is 99.95% pure with oxygen <10 ppm. Both exhibit identical 101% IACS conductivity; C10100 is specified when ultra-high vacuum or glass-to-metal sealing is critical.Direct commercial substitution is generally permissible subject to certified Mill Test Report (MTR) confirmation for critical applications.	VERIFIED
C11000 ETP Copper	Copper Alloys	Nearest Alternative	C10100 is vacuum-melted oxygen-free copper, eliminating the cuprous oxide (Cu2O) inclusions found in C11000 ETP Copper. This provides immunity to hydrogen embrittlement during brazing/welding above 370°C.Design parameters (weldability, hardenability, fatigue limit) must be re-evaluated for the specific application.	VERIFIED

Pure Copper Alloy Family

Copper alloys sharing common alloying formulations and metallurgical classifications under the Pure Copper branch.

3 Adjacent Grades

C11000

C11000 ETP Copper

View Grade →

C10100Current Grade

C10100 Oxygen-Free Electronic (OFE) Copper

C10200

C10200 Oxygen-Free (OF) Copper

View Grade →

Related Engineering & Metallurgy Guides

Contextual technical guides explaining degradation mechanisms, testing methodologies, and selection criteria relevant to C10100 Oxygen-Free Electronic (OFE) Copper.

Material Selection8–10 min read

C11000 ETP vs C10200 Oxygen-Free Copper: How to Choose

Choose copper by the atmosphere, joining route and conductivity requirement—not purity alone.

Author: Mat Grades Editorial DeskRead Guide →

Sources

Sources & Provenance Trail: Authoritative reference publications, standards specifications, and data registers cited across this material record.

Copper Development Association Inc.CDA Alloy C10100 Property & Specification Profile

AUTHORITATIVE BODY

Copper Development Association authoritative technical reference profile for C10100 Oxygen-Free Electronic (OFE) Copper.

Issuing Body: Copper Development Association (CDA)View Source Record ↗

Copper Development Association Inc.CDA UNS Standard Designations Register (C10100)

AUTHORITATIVE BODY

Unified Numbering System (UNS) designation registration register confirming active C10100 status.

Issuing Body: Copper Development Association (CDA)View Source Record ↗

Intellectual Property & Provenance Notice: Mat Grades cites technical literature from recognized industry associations and standards organizations. Underlying technical standards and publication data remain the intellectual property of their respective issuing organizations.