Copper Alloys•High-Performance Copper Alloys•

VERIFIED(Source-Verified)

C19400 High-Strength Modified Copper (HSM Copper)

Primary Designation:UNS C19400

Aliases:

HSM CopperOlin 194C19400

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:5 composition elements and 82 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

8.913 g/cm³TYPICAL · at 20 °C

Electrical Conductivity

65 % IACSTYPICAL · at 20 °C

Thermal Conductivity

259.61 W/(m·K)TYPICAL · at 20 °C

Specific Heat Capacity

385.2 J/(kg·K)TYPICAL · at 20 °C

Melting Range (Solidus / Liquidus)

1082.2 – 1087.8 °C1980.0 – 1990.0 °F

Solidus: 1082.2°C | Liquidus: 1087.8°C

Composition Excerpt

Cu ≥ 97 wt%Copper (min)

Standard Elemental Basis: MIN

Engineering Summary

UNS C19400 High-Strength Modified Copper (97.0% Cu min, 2.1-2.6% Fe, 0.015-0.15% P, 0.05-0.20% Zn) is an engineered electronic alloy combining high thermal and electrical conductivity (65% IACS) with superior resistance to thermal softening and stress relaxation. Standardized for semiconductor leadframes, automotive connectors, and circuit breaker components.

C19400 High-Strength Modified Copper (HSM Copper) Documented Applications

›Automotive: Electrical Connectors - Automotive
›Cable Wrap: Conductivity (Thermal)
›Cable Wrap: Corrosion Resistance
›Cable Wrap: Durability
›Cable Wrap: Forming Characteristics
›Cable Wrap: Mechanical Properties
›Circuit Breaker Components: Conductivity (Electrical)
›Circuit Breaker Components: Conductivity (Thermal)
›Circuit Breaker Components: Corrosion Resistance
›Circuit Breaker Components: Mechanical Properties
›Circuit Breaker Components: Softening Resistance
›Circuit Breaker Components: Solderability

Recognized Aliases

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

HSM CopperOlin 194C19400

C19400 High-Strength Modified Copper (HSM 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	C19400	Unified Numbering System	Unified Numbering System standard designation for copper alloys (CDA / SAE / ASTM)Ref: CDA UNS Standard Designations Register (C19400)
CDA	Alloy 194	Copper Development Association Alloy Number	CDA three-digit legacy designationRef: CDA UNS Standard Designations Register (C19400)

Recognized Commercial Aliases & Trade NamesCOMMON ALIAS

4 Listed

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Recognized Name / Alias	Classification	Technical Usage & Context
High Strength Modified Copper	Standard Commercial Name	CDA Standard Commercial Name
HSM Copper	Commercial Alias	Colloquial or commercial industry synonym
Olin 194	Commercial Alias	Colloquial or commercial industry synonym
C19400	Commercial Alias	Colloquial or commercial industry synonym

Applicable Specifications & Product Form ReferencesSPECIFICATION REFERENCE

7 Applicable Standards

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Standards Body	Specification Code	Specification Title / Scope	Relationship Type
ASTM	ASTM B465	COPPER-IRON ALLOY PLATE, SHEET, STRIP, AND ROLLED BAR	Specification Reference
ASTM	ASTM B956/B956M	WELDED COPPER AND COPPER-ALLOY CONDENSER AND HEAT EXCHANGER TUBES WITH INTEGRAL FINS	Specification Reference
ASTM	ASTM B694	COPPER, COPPER ALLOY AND COPPER-CLAD STAINLESS STEEL SHEET AND STRIP FOR ELECTRICAL CABLE SHIELDING	Specification Reference
ASTM	ASTM B888/B88M	COPPER ALLOY STRIP FOR USE IN MANUFACTURE OF ELECTRICAL CONNECTORS OR SPRING CONTACTS	Specification Reference
ASME	ASME SB543	WELDED COPPER AND COPPER ALLOY TUBE	Specification Reference
ASTM	ASTM B543/B543M	WELDED COPPER AND COPPER ALLOY HEAT EXCHANGER TUBE	Specification Reference
ASME	ASME SB956	Tube, Welded, Condenser, Heat Exchanger, w/ Integral Fins	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.

C19400 High-Strength Modified Copper (HSM 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	≥ 97.00	wt%	CDA chemical composition specification limits for C19400: min 97.0 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Lead	Pb	82	MAXIMUM	≤ 0.03	wt%	CDA chemical composition specification limits for C19400: max 0.03 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Zinc	Zn	30	RANGE	0.05 – 0.20	wt%	CDA chemical composition specification limits for C19400: 0.05 - 0.2 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Iron	Fe	26	RANGE	2.10 – 2.60	wt%	CDA chemical composition specification limits for C19400: 2.1 - 2.6 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Phosphorus	P	15	RANGE	0.01 – 0.15	wt%	CDA chemical composition specification limits for C19400: 0.015 - 0.15 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:

C19400 High-Strength Modified Copper (HSM 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	8.913 g/cm³	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Density 0.322 lb/cu in. at 68°F (8.913 g/cm³ at 20°C)	0.322 lb/cu in. at 68°F	Copper Development Association Inc.	VERIFIED

C19400 High-Strength Modified Copper (HSM 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.

7 Parameters

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Property Parameter	Canonical SI Value	Semantic Basis	Test Temperature / Context Range	Source Raw Reference	Source Reference	Status
Liquidus Temperature	1087.8 °C	TYPICAL	CDA Physical Properties: Liquidus temperature 1990.0 °F (1087.8 °C)	1990.0 °F	Copper Development Association Inc.	VERIFIED
Solidus Temperature	1082.2 °C	TYPICAL	CDA Physical Properties: Solidus temperature 1980.0 °F (1082.2 °C)	1980.0 °F	Copper Development Association Inc.	VERIFIED
Thermal Conductivity	259.61 W/(m·K)	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Thermal conductivity 150.0 Btu/(ft·hr·°F) (259.61 W/(m·K) at 20°C)	150.0 Btu/ sq ft/ ft hr/ °F at 68°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

C19400 High-Strength Modified Copper (HSM 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	65 % IACS	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Volume conductivity 65.0 % IACS at 68°F (20°C)	65.0 % IACS at 68°F	Copper Development Association Inc.	VERIFIED

C19400 High-Strength Modified Copper (HSM 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)

120.7 GPa

CDA Physical Properties: Elastic modulus in tension 17500.0 ksi (120.7 GPa)

Modulus of Rigidity

45505.4 MPa

CDA Physical Properties: Shear modulus 6600.0 ksi (45505.4 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 28 of 28 conditions

Scroll horizontally for all conditions & tempers

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: 413.7 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: 9 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H02	0.04	413.7 MPa	365.4 MPa	9 %	—	—	—	VERIFIED
Flat Products	1/2 Hard (H02) Source values and qualifiers Rockwell B Hardness: 68 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 66 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H02	0.04	—	—	—	—	—	68 HRB66 HR30T	VERIFIED
Flat Products	Extra Hard (H06) · 20 °C Source values and qualifiers Tensile Strength: 482.6 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 468.8 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 3 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H06	0.04	482.6 MPa	468.8 MPa	3 %	—	—	—	VERIFIED
Flat Products	Extra Hard (H06) Source values and qualifiers Rockwell B Hardness: 74 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 71 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H06	0.04	—	—	—	—	—	74 HRB71 HR30T	VERIFIED
Flat Products	Extra Spring (H10) · 20 °C Source values and qualifiers Tensile Strength: 524 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 503.3 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 2 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H10	0.04	524 MPa	503.3 MPa	2 %	—	—	—	VERIFIED
Flat Products	Extra Spring (H10) Source values and qualifiers Rockwell B Hardness: 77 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 74 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Fatigue Strength: 144.8 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; 10^8 cycles endurance limitCopper Development Association (CDA) — H10	0.04	—	—	—	—	144.8 MPa	77 HRB74 HR30T	VERIFIED
Flat Products	Hard (H04) · 20 °C Source values and qualifiers Tensile Strength: 461.9 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 434.4 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) — H04	0.04	461.9 MPa	434.4 MPa	4 %	—	—	—	VERIFIED
Flat Products	Hard (H04) Source values and qualifiers Rockwell B Hardness: 73 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 69 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Fatigue Strength: 144.8 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; 10^8 cycles endurance limitCopper Development Association (CDA) — H04	0.04	—	—	—	—	144.8 MPa	73 HRB69 HR30T	VERIFIED
Flat Products	Light Anneal (O50) · 20 °C Source values and qualifiers Tensile Strength: 344.7 MPa (TYPICAL)Section Size: 0.025; Section Size: 0.025 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 206.8 MPa (TYPICAL)Section Size: 0.025; Section Size: 0.025 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 29 % (TYPICAL)Section Size: 0.025; Section Size: 0.025 inCopper Development Association (CDA) — O50	0.025	344.7 MPa	206.8 MPa	29 %	—	—	—	VERIFIED
Flat Products	Light Anneal (O50) Source values and qualifiers Rockwell B Hardness: 45 HRB (TYPICAL)Section Size: 0.025; Section Size: 0.025 inCopper Development Association (CDA) — O50	0.025	—	—	—	—	—	45 HRB	VERIFIED
Flat Products	Soft Anneal (O60) · 20 °C Source values and qualifiers Tensile Strength: 310.3 MPa (TYPICAL)Section Size: 0.025; Section Size: 0.025 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 165.5 MPa (TYPICAL)Section Size: 0.025; Section Size: 0.025 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 32 % (TYPICAL)Section Size: 0.025; Section Size: 0.025 inCopper Development Association (CDA) — O60	0.025	310.3 MPa	165.5 MPa	32 %	—	—	—	VERIFIED
Flat Products	Soft Anneal (O60) Source values and qualifiers Rockwell B Hardness: 38 HRB (TYPICAL)Section Size: 0.025; Section Size: 0.025 inCopper Development Association (CDA) — Fatigue Strength: 110.3 MPa (TYPICAL)Section Size: 0.025; Section Size: 0.025 in; 10^8 cycles endurance limitCopper Development Association (CDA) — O60	0.025	—	—	—	—	110.3 MPa	38 HRB	VERIFIED
Flat Products	Spring (H08) · 20 °C Source values and qualifiers Tensile Strength: 503.3 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 489.5 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 2 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H08	0.04	503.3 MPa	489.5 MPa	2 %	—	—	—	VERIFIED
Flat Products	Spring (H08) Source values and qualifiers Rockwell B Hardness: 75 HRB (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Rockwell 30T Hardness: 72 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Fatigue Strength: 151.7 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; 10^8 cycles endurance limitCopper Development Association (CDA) — H08	0.04	—	—	—	—	151.7 MPa	75 HRB72 HR30T	VERIFIED
Flat Products	Super Spring (H14) · 20 °C Source values and qualifiers Tensile Strength: 551.6 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 503.3 MPa (TYPICAL)Section Size: 0.04; Section Size: 0.04 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 1 % (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H14	0.04	551.6 MPa	503.3 MPa	1 %	—	—	—	VERIFIED
Flat Products	Super Spring (H14) Source values and qualifiers Rockwell 30T Hardness: 73 HR30T (TYPICAL)Section Size: 0.04; Section Size: 0.04 inCopper Development Association (CDA) — H14	0.04	—	—	—	—	—	73 HR30T	VERIFIED
Tube	1/2 Hard (H02) · 20 °C Source values and qualifiers Tensile Strength: 399.9 MPa (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 379.2 MPa (TYPICAL)Section Size: 0.035; Section Size: 0.035 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 9 % (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — H02	0.035	399.9 MPa	379.2 MPa	9 %	—	—	—	VERIFIED
Tube	1/2 Hard (H02) Source values and qualifiers Rockwell B Hardness: 61 HRB (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — Rockwell 30T Hardness: 60 HR30T (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — H02	0.035	—	—	—	—	—	61 HRB60 HR30T	VERIFIED
Tube	As-Welded from Extra Spring Strip (WM10) · 20 °C Source values and qualifiers Tensile Strength: 524 MPa (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 503.3 MPa (TYPICAL)Section Size: 0.035; Section Size: 0.035 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 1 % (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — WM10	0.035	524 MPa	503.3 MPa	1 %	—	—	—	VERIFIED
Tube	As-Welded from Extra Spring Strip (WM10) Source values and qualifiers Rockwell B Hardness: 76 HRB (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — Rockwell 30T Hardness: 69 HR30T (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — WM10	0.035	—	—	—	—	—	76 HRB69 HR30T	VERIFIED
Tube	As-Welded from Hard Strip (WM04) · 20 °C Source values and qualifiers Tensile Strength: 448.2 MPa (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 434.4 MPa (TYPICAL)Section Size: 0.035; Section Size: 0.035 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 4 % (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — WM04	0.035	448.2 MPa	434.4 MPa	4 %	—	—	—	VERIFIED
Tube	As-Welded from Hard Strip (WM04) Source values and qualifiers Rockwell B Hardness: 73 HRB (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — Rockwell 30T Hardness: 66 HR30T (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — WM04	0.035	—	—	—	—	—	73 HRB66 HR30T	VERIFIED
Tube	Hard Drawn (H80) · 20 °C Source values and qualifiers Tensile Strength: 468.8 MPa (TYPICAL)Section Size: 0.035; Cold Work: 35%; Section Size: 0.035 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 455.1 MPa (TYPICAL)Section Size: 0.035; Cold Work: 35%; Section Size: 0.035 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 2 % (TYPICAL)Section Size: 0.035; Cold Work: 35%; Section Size: 0.035 inCopper Development Association (CDA) — H80	0.035	468.8 MPa	455.1 MPa	2 %	—	—	—	VERIFIED
Tube	Hard Drawn (H80) Source values and qualifiers Rockwell B Hardness: 73 HRB (TYPICAL)Section Size: 0.035; Cold Work: 35%; Section Size: 0.035 inCopper Development Association (CDA) — Rockwell 30T Hardness: 66 HR30T (TYPICAL)Section Size: 0.035; Cold Work: 35%; Section Size: 0.035 inCopper Development Association (CDA) — H80	0.035	—	—	—	—	—	73 HRB66 HR30T	VERIFIED
Tube	Light Anneal (O50) · 20 °C Source values and qualifiers Tensile Strength: 344.7 MPa (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 206.8 MPa (TYPICAL)Section Size: 0.035; Section Size: 0.035 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 16 % (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — O50	0.035	344.7 MPa	206.8 MPa	16 %	—	—	—	VERIFIED
Tube	Light Anneal (O50) Source values and qualifiers Rockwell B Hardness: 45 HRB (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — O50	0.035	—	—	—	—	—	45 HRB	VERIFIED
Tube	Soft Anneal (O60) · 20 °C Source values and qualifiers Tensile Strength: 310.3 MPa (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 165.5 MPa (TYPICAL)Section Size: 0.035; Section Size: 0.035 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 28 % (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — O60	0.035	310.3 MPa	165.5 MPa	28 %	—	—	—	VERIFIED
Tube	Soft Anneal (O60) Source values and qualifiers Rockwell B Hardness: 38 HRB (TYPICAL)Section Size: 0.035; Section Size: 0.035 inCopper Development Association (CDA) — O60	0.035	—	—	—	—	—	38 HRB	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

C19400 High-Strength Modified Copper (HSM 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: Good; Gas Shielded Arc Welding: Excellent; 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 C19400 High-Strength Modified Copper (HSM Copper) states: Machinability rating: 20% relative to free-cutting brass (C36000 = 100%). Forgeability rating: 65. A relevant hardness example is Rockwell B Hardness: 68 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: Good; Gas Shielded Arc Welding: Excellent; 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: 413.7 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: 259.61 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 97 wt%, Pb maximum 0.03 wt%, Zn 0.05–0.2 wt%. Chemistry documents identity; it does not establish fluid compatibility.

Selection trade-offs & applications

Use UNS C19400, COMMERCIAL High Strength Modified Copper, CDA Alloy 194 to identify the candidate, then specify the product form and delivered condition separately. The catalog lists Automotive: Electrical Connectors - Automotive as an application example. The related candidate C11000 ETP Copper is linked for comparison; its commonly compared 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)

C19400 High-Strength Modified Copper (HSM Copper) Equivalent & Comparable Grades

Comparable Grades & Cross-References: Carefully classified cross-reference relationships for C19400 High-Strength Modified Copper (HSM Copper). Comparable does not mean equivalent.

Scroll horizontally for relationship classifications & comparisons

Related Material	Family	Relationship Classification	Metallurgical Notes & Differences	Status	Action
C11000 ETP Copper	Copper Alloys	Commonly Compared	C19400 (Cu-Fe-P) provides superior resistance to softening at elevated soldering temperatures and higher yield strength for electronic leadframes, with 65% IACS conductivity vs 101% for C11000.Materials serve different design priorities (e.g. higher strength vs superior corrosion resistance or cost).	VERIFIED
C51000 Phosphor Bronze 5% A	Copper Alloys	Commonly Compared	C19400 provides higher electrical conductivity (65% vs 15% IACS) for high-current electronic terminals, whereas C51000 provides higher fatigue endurance for flexible spring contacts.Materials serve different design priorities (e.g. higher strength vs superior corrosion resistance or cost).	VERIFIED

Sources

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

Copper Development Association Inc.CDA Alloy C19400 Property & Specification Profile

AUTHORITATIVE BODY

Copper Development Association authoritative technical reference profile for C19400 High-Strength Modified Copper (HSM Copper).

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

Copper Development Association Inc.CDA UNS Standard Designations Register (C19400)

AUTHORITATIVE BODY

Unified Numbering System (UNS) designation registration register confirming active C19400 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.