Copper Alloys•Aluminum Bronze•

VERIFIED(Source-Verified)

C63200 Nickel-Aluminum Bronze (Naval Alloy)

Primary Designation:UNS C63200

Aliases:

Naval Nickel-Aluminum BronzeMIL-B-24480 alloyC63200

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:7 composition elements and 41 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

7.64 g/cm³TYPICAL · at 20 °C

Electrical Conductivity

7 % IACSTYPICAL · at 20 °C

Thermal Conductivity

34.61 W/(m·K)TYPICAL · at 20 °C

Specific Heat Capacity

439.6 J/(kg·K)TYPICAL · at 20 °C

Melting Range (Solidus / Liquidus)

1040.6 – 1060 °C1905.0 – 1940.0 °F

Solidus: 1040.6°C | Liquidus: 1060°C

Composition Excerpt

Cu BALANCE wt%Copper (balance)

Standard Elemental Basis: BALANCE

Engineering Summary

UNS C63200 Nickel-Aluminum Bronze (8.7-9.5% Al, 4.0-4.8% Ni, 3.5-4.3% Fe, 1.2-2.0% Mn) is a specialized marine alloy governed by MIL-B-24480 / ASTM B150. Formulated with iron strictly not exceeding nickel content, it delivers enhanced notch-toughness and impact resistance for submarine piping and naval defense hardware.

C63200 Nickel-Aluminum Bronze (Naval Alloy) Documented Applications

›Bearing Cages: Mechanical Properties
›Bearing Cages: Softening Resistance
›Bolting: Corrosion Resistance
›Bolting: Mechanical Properties
›Bushings: Friction & Wear Properties
›Bushings: Mechanical Properties
›Bushings: Softening Resistance
›Cams: Corrosion Resistance
›Cams: Friction & Wear Properties
›Cams: Mechanical Properties
›Cams: Softening Resistance
›Drive Shafts, Marine Service: Corrosion Resistance

Recognized Aliases

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

Naval Nickel-Aluminum BronzeMIL-B-24480 alloyC63200

C63200 Nickel-Aluminum Bronze (Naval Alloy) 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	C63200	Unified Numbering System	Unified Numbering System standard designation for copper alloys (CDA / SAE / ASTM)Ref: CDA UNS Standard Designations Register (C63200)
CDA	Alloy 632	Copper Development Association Alloy Number	CDA three-digit legacy designationRef: CDA UNS Standard Designations Register (C63200)

Recognized Commercial Aliases & Trade NamesCOMMON ALIAS

4 Listed

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Recognized Name / Alias	Classification	Technical Usage & Context
Nickel-Aluminum Bronze (Naval Alloy)	Standard Commercial Name	CDA Standard Commercial Name
Naval Nickel-Aluminum Bronze	Commercial Alias	Colloquial or commercial industry synonym
MIL-B-24480 alloy	Commercial Alias	Colloquial or commercial industry synonym
C63200	Commercial Alias	Colloquial or commercial industry synonym

Applicable Specifications & Product Form ReferencesSPECIFICATION REFERENCE

9 Applicable Standards

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Standards Body	Specification Code	Specification Title / Scope	Relationship Type
ASTM	ASTM B124/B124M	COPPER AND COPPER-ALLOY FORGING ROD, BAR AND SHAPES	Specification Reference
MILITARY	MILITARY MIL-E-23765/3	ELECTRODES, WELDING, BARE, COPPER AND COPPER ALLOY	Specification Reference
AWS	AWS A5.6	COPPER AND COPPER ALLOY COVERED ELECTRODES	Specification Reference
ASME	ASME SB283	COPPER AND COPPER ALLOY DIE FORGINGS (HOT PRESSED)	Specification Reference
ASTM	ASTM B283/B283M	COPPER AND COPPER ALLOY DIE FORGINGS (HOT PRESSED)	Specification Reference
ASTM	ASTM B171/B171M	COPPER ALLOY CONDENSER TUBE PLATES	Specification Reference
ASME	ASME SB171	COPPER ALLOY CONDENSER TUBE PLATES	Specification Reference
ASTM	ASTM B150/B150M	ALUMINUM BRONZE ROD, BAR AND SHAPES	Specification Reference
ASME	ASME SB150	ALUMINUM BRONZE ROD, BAR, AND SHAPES	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.

C63200 Nickel-Aluminum Bronze (Naval Alloy) Chemical Composition

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

Scroll horizontally for full elemental limits

Element	Symbol	Atomic No.	Semantic Basis	Specified Value	Unit	Metallurgical Notes & Qualification	Data Status
Copper	Cu	29	BALANCE	Balance	wt%	Remainder element (Copper).Ref: Copper Development Association (CDA)	VERIFIED
Lead	Pb	82	MAXIMUM	≤ 0.02	wt%	CDA chemical composition specification limits for C63200: max 0.02 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Iron	Fe	26	RANGE	3.50 – 4.30	wt%	CDA chemical composition specification limits for C63200: 3.5 - 4.3 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Nickel	Ni	28	RANGE	4.00 – 4.80	wt%	CDA chemical composition specification limits for C63200: 4.0 - 4.8 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Aluminum	Al	13	RANGE	8.70 – 9.50	wt%	CDA chemical composition specification limits for C63200: 8.7 - 9.5 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Manganese	Mn	25	RANGE	1.20 – 2.00	wt%	CDA chemical composition specification limits for C63200: 1.2 - 2.0 wt%.Ref: Copper Development Association (CDA)	VERIFIED
Silicon	Si	14	MAXIMUM	≤ 0.10	wt%	CDA chemical composition specification limits for C63200: max 0.1 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:

C63200 Nickel-Aluminum Bronze (Naval Alloy) 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	7.64 g/cm³	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Density 0.276 lb/cu in. at 68°F (7.64 g/cm³ at 20°C)	0.276 lb/cu in. at 68°F	Copper Development Association Inc.	VERIFIED

C63200 Nickel-Aluminum Bronze (Naval Alloy) 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	1060 °C	TYPICAL	CDA Physical Properties: Liquidus temperature 1940.0 °F (1060.0 °C)	1940.0 °F	Copper Development Association Inc.	VERIFIED
Solidus Temperature	1040.6 °C	TYPICAL	CDA Physical Properties: Solidus temperature 1905.0 °F (1040.6 °C)	1905.0 °F	Copper Development Association Inc.	VERIFIED
Thermal Conductivity	34.61 W/(m·K)	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Thermal conductivity 20.0 Btu/(ft·hr·°F) (34.61 W/(m·K) at 20°C)	20.0 Btu/ sq ft/ ft hr/ °F at 68°F	Copper Development Association Inc.	VERIFIED
Coefficient of Thermal Expansion (CTE)	16.2 µm/(m·K)	TYPICAL	CDA Physical Properties: CTE 9.0 µin/(in·°F) (16.2 µm/(m·K)) over range 68-57210°F	9.0 10^-6 per °F	Copper Development Association Inc.	VERIFIED
Specific Heat Capacity	439.6 J/(kg·K)	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Specific heat 0.105 Btu/(lb·°F) (439.6 J/(kg·K))	0.105 Btu/ lb /°F at 68°F	Copper Development Association Inc.	VERIFIED
Annealing Temperature Range	621.1 – 704.4 °C	RANGE	CDA Thermal Treatments: Annealing temperature range 1150 - 1300°F (621.1 - 704.4°C)	1150 – 1300 °F	Copper Development Association Inc.	VERIFIED
Hot Working Temperature Range	815.6 – 898.9 °C	RANGE	CDA Thermal Treatments: Hot working range 1500 - 1650°F (815.6 - 898.9°C)	1500 – 1650 °F	Copper Development Association Inc.	VERIFIED

C63200 Nickel-Aluminum Bronze (Naval Alloy) 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	7 % IACS	TYPICAL	Test Temp: 20 °CCDA Physical Properties: Volume conductivity 7.0 % IACS at 68°F (20°C)	7.0 % IACS at 68°F	Copper Development Association Inc.	VERIFIED

C63200 Nickel-Aluminum Bronze (Naval Alloy) 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

30 %

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

Forgeability Rating

70 —

CDA Fabrication Properties: Relative forgeability rating.

Product Form:

Temper / Condition:

Showing 14 of 14 conditions

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Product Form	Temper / Condition	Section Size	Tensile (UTS)	Yield Strength	Elongation	Shear Strength	Fatigue Strength	Hardness (Scales Preserved)	Status
Forgings	Light Anneal (O50) · 20 °C Source values and qualifiers Tensile Strength: 689.5 MPa (TYPICAL)Section Size: 5; Section Size: 5 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 310.3 MPa (TYPICAL)Section Size: 5; Section Size: 5 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 22 % (TYPICAL)Section Size: 5; Section Size: 5 inCopper Development Association (CDA) — O50	5	689.5 MPa	310.3 MPa	22 %	—	—	—	VERIFIED
Forgings	Light Anneal (O50) Source values and qualifiers Rockwell B Hardness: 92 HRB (TYPICAL)Section Size: 5; Section Size: 5 inCopper Development Association (CDA) — O50	5	—	—	—	—	—	92 HRB	VERIFIED
Plate	Light Anneal (O50) · 20 °C Source values and qualifiers Tensile Strength: 655 MPa (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 324.1 MPa (TYPICAL)Section Size: 0.5; Section Size: 0.5 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 22 % (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — O50	0.5	655 MPa	324.1 MPa	22 %	—	—	—	VERIFIED
Plate	Light Anneal (O50) Source values and qualifiers Rockwell B Hardness: 89 HRB (TYPICAL)Section Size: 0.5; Section Size: 0.5 inCopper Development Association (CDA) — O50	0.5	—	—	—	—	—	89 HRB	VERIFIED
Plate	Light Anneal (O50) · 20 °C Source values and qualifiers Tensile Strength: 689.5 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 344.7 MPa (TYPICAL)Section Size: 0.25; Section Size: 0.25 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 20 % (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — O50	0.25	689.5 MPa	344.7 MPa	20 %	—	—	—	VERIFIED
Plate	Light Anneal (O50) Source values and qualifiers Rockwell B Hardness: 92 HRB (TYPICAL)Section Size: 0.25; Section Size: 0.25 inCopper Development Association (CDA) — O50	0.25	—	—	—	—	—	92 HRB	VERIFIED
Plate	Light Anneal (O50) · 20 °C Source values and qualifiers Tensile Strength: 620.5 MPa (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 310.3 MPa (TYPICAL)Section Size: 1; Section Size: 1 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 25 % (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — O50	1	620.5 MPa	310.3 MPa	25 %	—	—	—	VERIFIED
Plate	Light Anneal (O50) Source values and qualifiers Rockwell B Hardness: 85 HRB (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — O50	1	—	—	—	—	—	85 HRB	VERIFIED
Rod	Light Anneal (O50) · 20 °C Source values and qualifiers Tensile Strength: 710.2 MPa (TYPICAL)Section Size: 2; Section Size: 2 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 358.5 MPa (TYPICAL)Section Size: 2; Section Size: 2 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 24 % (TYPICAL)Section Size: 2; Section Size: 2 inCopper Development Association (CDA) — O50	2	710.2 MPa	358.5 MPa	24 %	—	—	—	VERIFIED
Rod	Light Anneal (O50) Source values and qualifiers Rockwell B Hardness: 94 HRB (TYPICAL)Section Size: 2; Section Size: 2 inCopper Development Association (CDA) — O50	2	—	—	—	—	—	94 HRB	VERIFIED
Rod	Light Anneal (O50) · 20 °C Source values and qualifiers Tensile Strength: 723.9 MPa (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 365.4 MPa (TYPICAL)Section Size: 1; Section Size: 1 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 22 % (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — O50	1	723.9 MPa	365.4 MPa	22 %	—	—	—	VERIFIED
Rod	Light Anneal (O50) Source values and qualifiers Rockwell B Hardness: 96 HRB (TYPICAL)Section Size: 1; Section Size: 1 inCopper Development Association (CDA) — O50	1	—	—	—	—	—	96 HRB	VERIFIED
Rod	Light Anneal (O50) · 20 °C Source values and qualifiers Tensile Strength: 703.3 MPa (TYPICAL)Section Size: 3; Section Size: 3 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 351.6 MPa (TYPICAL)Section Size: 3; Section Size: 3 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 24 % (TYPICAL)Section Size: 3; Section Size: 3 inCopper Development Association (CDA) — O50	3	703.3 MPa	351.6 MPa	24 %	—	—	—	VERIFIED
Rod	Light Anneal (O50) Source values and qualifiers Rockwell B Hardness: 93 HRB (TYPICAL)Section Size: 3; Section Size: 3 inCopper Development Association (CDA) — O50	3	—	—	—	—	—	93 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

C63200 Nickel-Aluminum Bronze (Naval Alloy) Processing & Fabrication

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

Source: Copper Development Association (CDA)

Machinability

Machinability rating: 30% relative to free-cutting brass (C36000 = 100%). Forgeability rating: 70.

Weldability & Joining

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

Heat Treatment & Working Ranges

Annealing temperature range: 621.1°C to 704.4°C (1150°F - 1300°F). Hot working temperature range: 815.6°C to 898.9°C (1500°F - 1650°F).

Forming & Cold Working

Capacity for Being Cold Worked: Fair. Capacity for Being Hot Formed: Good.

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 C63200 Nickel-Aluminum Bronze (Naval Alloy) states: Machinability rating: 30% relative to free-cutting brass (C36000 = 100%). Forgeability rating: 70. A relevant hardness example is Rockwell B Hardness: 92 HRB (typical; Light Anneal (O50), O50, Forgings, 5). 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: Fair; Brazing: Fair; Oxyacetylene Welding: Not Recommended; Gas Shielded Arc Welding: Excellent; Coated Metal Arc Welding: Good; Spot Weld: Good; Seam Weld: Fair; Butt Weld: Good The first cataloged strength example is Tensile Strength: 689.5 MPa (typical; Light Anneal (O50), O50, Forgings, 5; 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: 34.61 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 Pb maximum 0.02 wt%, Fe 3.5–4.3 wt%. Chemistry documents identity; it does not establish fluid compatibility.

Selection trade-offs & applications

Use UNS C63200, COMMERCIAL Nickel-Aluminum Bronze (Naval Alloy), CDA Alloy 632 to identify the candidate, then specify the product form and delivered condition separately. The catalog lists Bearing Cages: Mechanical Properties as an application example. The related candidate C63000 Nickel-Aluminum Bronze (AMS 4640) 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)

C63200 Nickel-Aluminum Bronze (Naval Alloy) Equivalent & Comparable Grades

Comparable Grades & Cross-References: Carefully classified cross-reference relationships for C63200 Nickel-Aluminum Bronze (Naval Alloy). Comparable does not mean equivalent.

Scroll horizontally for relationship classifications & comparisons

Related Material	Family	Relationship Classification	Metallurgical Notes & Differences	Status	Action
C63000 Nickel-Aluminum Bronze (AMS 4640)	Copper Alloys	Commonly Compared	C63200 is a modified wrought nickel-aluminum bronze governed by MIL-B-24480, engineered with Fe <= Ni to ensure high dynamic fracture toughness in marine shock environments; C63000 is an aerospace/commercial wrought alloy and cannot be substituted for MIL-B-24480 naval applications without engineering qualification.Materials serve different design priorities (e.g. higher strength vs superior corrosion resistance or cost).	VERIFIED
C95400 Aluminum Bronze 9C	Copper Alloys	Commonly Compared	C63200 is wrought naval Ni-Al bronze with superior impact toughness; C95400 is cast aluminum bronze for general heavy industrial duty.Materials serve different design priorities (e.g. higher strength vs superior corrosion resistance or cost).	VERIFIED

Aluminum Bronze Alloy Family

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

4 Adjacent Grades

C61400

C61400 Aluminum Bronze D

View Grade →

C63000

C63000 Nickel-Aluminum Bronze (AMS 4640)

View Grade →

C63200Current Grade

C63200 Nickel-Aluminum Bronze (Naval Alloy)

C95400

C95400 Aluminum Bronze 9C

View Grade →

Related Engineering & Metallurgy Guides

Contextual technical guides explaining degradation mechanisms, testing methodologies, and selection criteria relevant to C63200 Nickel-Aluminum Bronze (Naval Alloy).

Welding & Fabrication18 min read

How to Weld Aluminium to Aluminium: TIG, MIG, Filler Metals & Alloy Guide

Aluminium possesses distinct physical and metallurgical properties—including a tenacious refractory oxide layer that melts at 2,072°C, thermal conductivity five times higher than structural steel, extreme liquid hydrogen solubility, and a lack of visible color change before melting. Successful aluminium-to-aluminium welding requires matching the base alloy series to an appropriate process (AC TIG, pulsed MIG, or SMAW) and compatible filler metal while designing for unavoidable heat-affected zone softening.

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 C63200 Property & Specification Profile

AUTHORITATIVE BODY

Copper Development Association authoritative technical reference profile for C63200 Nickel-Aluminum Bronze (Naval Alloy).

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

Copper Development Association Inc.CDA UNS Standard Designations Register (C63200)

AUTHORITATIVE BODY

Unified Numbering System (UNS) designation registration register confirming active C63200 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.