C63000 Nickel-Aluminum Bronze (AMS 4640)
Primary Designation:UNS C63000
Aliases:
Nickel-Aluminum BronzeAMS 4640 alloyC63000
Mat Grades internal verification confirms source-backed fidelity and data integrity. It does not constitute external certification, ASTM/CDA endorsement, or guaranteed material conformity for procurement.
Data Completeness & Record Integrity:8 composition elements and 50 contextual property values cataloged.
Omitted fields represent unverified parameters. "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
7.584 g/cm³TYPICAL · at 20 °C
Electrical Conductivity
7 % IACSTYPICAL · at 20 °C
Thermal Conductivity
39.11 W/(m·K)TYPICAL · at 20 °C
Specific Heat Capacity
376.8 J/(kg·K)TYPICAL · at 20 °C
Melting Range (Solidus / Liquidus)
1035 – 1054.4 °C1895.0 – 1930.0 °F
Solidus: 1035°C | Liquidus: 1054.4°CComposition Excerpt
Cu BALANCE wt%Copper (balance)
Standard Elemental Basis: BALANCEEngineering Summary
UNS C63000 Nickel-Aluminum Bronze (9.0-11.0% Al, 4.0-5.5% Ni, 2.0-4.0% Fe) is an ultra-high-strength wrought alloy (AMS 4640 / ASTM B150) heat-treatable to high hardness. Renowned for superior resistance to cavitation erosion, shock loading, and marine corrosion, commonly specified for aircraft landing gear bushings, marine valves, and heavy-duty wear rings.
Documented Product Applications (Cited CDA Reference Profile)
- ›Aircraft Parts: Friction & Wear Properties
- ›Aircraft Parts: Impact Resistance
- ›Aircraft Parts: Mechanical Properties
- ›Balls: Corrosion Resistance
- ›Balls: Friction & Wear Properties
- ›Balls: Mechanical Properties
- ›Bearings: Corrosion Resistance
- ›Bearings: Friction & Wear Properties
- ›Bearings: Mechanical Properties
- ›Bolts: Corrosion Resistance
- ›Bolts: Impact Resistance
- ›Bolts: Mechanical Properties
Recognized Aliases
Source-backed commercial trade name and short designations cataloged in canonical data.
Nickel-Aluminum BronzeAMS 4640 alloyC63000
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| System | Identifier | Standard System Name | Classification Notes & Provenance |
|---|---|---|---|
| UNSPRIMARY | C63000 | Unified Numbering System | Unified Numbering System standard designation for copper alloys (CDA / SAE / ASTM)Ref: CDA UNS Standard Designations Register (C63000) |
| CDA | Alloy 630 | Copper Development Association Alloy Number | CDA three-digit legacy designationRef: CDA UNS Standard Designations Register (C63000) |
Recognized Commercial Aliases & Trade NamesCOMMON ALIAS
4 Listed| Recognized Name / Alias | Classification | Technical Usage & Context |
|---|---|---|
| Nickel-Aluminum Bronze (AMS 4640) | Standard Commercial Name | CDA Standard Commercial Name |
| Nickel-Aluminum Bronze | Commercial Alias | Colloquial or commercial industry synonym |
| AMS 4640 alloy | Commercial Alias | Colloquial or commercial industry synonym |
| C63000 | Commercial Alias | Colloquial or commercial industry synonym |
Applicable Specifications & Product Form ReferencesSPECIFICATION REFERENCE
12 Applicable Standards| Standards Body | Specification Code | Specification Title / Scope | Relationship Type |
|---|---|---|---|
| SAE | SAE J461 | WROUGHT AND CAST COPPER ALLOYS | Specification Reference |
| SAE | SAE J463 | WROUGHT COPPER AND COPPER ALLOYS | Specification Reference |
| ASTM | ASTM B124/B124M | COPPER AND COPPER-ALLOY FORGING ROD, BAR AND SHAPES | Specification Reference |
| AMS | AMS 4640 | ALUMINUM BRONZE BARS, RODS, SHAPES, TUBES, AND FORGINGS | Specification Reference |
| FEDERAL | FEDERAL QQ-C-450 | COPPER-ALUMINUM ALLOY (ALUMINUM BRONZE, PLATE, SHEET, STRIP, AND BAR) | Specification Reference |
| ASTM | ASTM F468 | NONFERROUS BOLTS, HEX CAP SCREWS, AND STUDS FOR GENERAL USE | Specification Reference |
| MILITARY | MILITARY MIL-B-16166 | BRONZE, ALUMINUM, FORGINGS, HEAT TREATED | 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 F467 | NONFERROUS NUTS FOR GENERAL USE | Specification Reference |
| ASTM | ASTM B171/B171M | COPPER ALLOY CONDENSER TUBE PLATES | Specification Reference |
| ASME | ASME SB171 | COPPER ALLOY CONDENSER TUBE PLATES | 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.
Chemical Composition (Weight %)
Elemental limits and values from the cited source. Preserves exact semantic limits (minimums, maximums, and ranges).
| 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 |
| Tin | Sn | 50 | MAXIMUM | ≤ 0.20 | wt% | CDA chemical composition specification limits for C63000: max 0.2 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Zinc | Zn | 30 | MAXIMUM | ≤ 0.30 | wt% | CDA chemical composition specification limits for C63000: max 0.3 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Iron | Fe | 26 | RANGE | 2.00 – 4.00 | wt% | CDA chemical composition specification limits for C63000: 2.0 - 4.0 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Nickel | Ni | 28 | RANGE | 4.00 – 5.50 | wt% | CDA chemical composition specification limits for C63000: 4.0 - 5.5 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Aluminum | Al | 13 | RANGE | 9.00 – 11.00 | wt% | CDA chemical composition specification limits for C63000: 9.0 - 11.0 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Manganese | Mn | 25 | MAXIMUM | ≤ 1.50 | wt% | CDA chemical composition specification limits for C63000: max 1.5 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Silicon | Si | 14 | MAXIMUM | ≤ 0.25 | wt% | CDA chemical composition specification limits for C63000: max 0.25 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:
Physical Properties
Source-specific physical properties. Test temperatures are shown only where reported.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Density | 7.584 g/cm³ | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Density 0.274 lb/cu in. at 68°F (7.584 g/cm³ at 20°C) | 0.274 lb/cu in. at 68°F | Copper Development Association Inc. | VERIFIED |
Thermal & Thermodynamic Properties
Phase change temperatures, thermal conductivity, specific heat, mean coefficients of thermal expansion across standardized temperature ranges, and recommended thermal processing windows.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Liquidus Temperature | 1054.4 °C | TYPICAL | CDA Physical Properties: Liquidus temperature 1930.0 °F (1054.4 °C) | 1930.0 °F | Copper Development Association Inc. | VERIFIED |
| Solidus Temperature | 1035 °C | TYPICAL | CDA Physical Properties: Solidus temperature 1895.0 °F (1035.0 °C) | 1895.0 °F | Copper Development Association Inc. | VERIFIED |
| Thermal Conductivity | 39.11 W/(m·K) | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Thermal conductivity 22.6 Btu/(ft·hr·°F) (39.11 W/(m·K) at 20°C) | 22.6 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 | 376.8 J/(kg·K) | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Specific heat 0.09 Btu/(lb·°F) (376.8 J/(kg·K)) | 0.09 Btu/ lb /°F at 68°F | Copper Development Association Inc. | VERIFIED |
| Annealing Temperature Range | 593.3 – 704.4 °C | RANGE | CDA Thermal Treatments: Annealing temperature range 1100 - 1300°F (593.3 - 704.4°C) | 1100 – 1300 °F | Copper Development Association Inc. | VERIFIED |
| Hot Working Temperature Range | 787.8 – 926.7 °C | RANGE | CDA Thermal Treatments: Hot working range 1450 - 1700°F (787.8 - 926.7°C) | 1450 – 1700 °F | Copper Development Association Inc. | VERIFIED |
Electrical Properties
Electrical conductivity and resistivity in their reported units and conditions.
| 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 |
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
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
75 —
CDA Fabrication Properties: Relative forgeability rating.Showing 14 of 14 conditions
| Product Form | Temper / Condition | Section Size | Tensile (UTS) | Yield Strength | Elongation | Shear Strength | Fatigue Strength | Hardness (Scales Preserved) | Status |
|---|---|---|---|---|---|---|---|---|---|
| Bar | As Hot Extruded (M30) · 20 °CSource values and qualifiersTensile Strength: 620.5 MPa (TYPICAL)Section Size: 3; Section Size: 3 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 344.7 MPa (TYPICAL)Section Size: 3; Section Size: 3 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 15 % (TYPICAL)Section Size: 3; Section Size: 3 inCopper Development Association (CDA) — | 3 | 620.5 MPa | 344.7 MPa | 15 % | — | — | — | VERIFIED |
| Bar | As Hot Extruded (M30)Source values and qualifiersRockwell B Hardness: 96 HRB (TYPICAL)Section Size: 3; Section Size: 3 inCopper Development Association (CDA) — | 3 | — | — | — | — | — | 96 HRB | VERIFIED |
| Bar | Drawn and Stress Relieved (HR50) · 20 °CSource values and qualifiersTensile Strength: 689.5 MPa (TYPICAL)Section Size: 2; Cold Work: 10%; Section Size: 2 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 413.7 MPa (TYPICAL)Section Size: 2; Cold Work: 10%; Section Size: 2 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 15 % (TYPICAL)Section Size: 2; Cold Work: 10%; Section Size: 2 inCopper Development Association (CDA) — | 2 | 689.5 MPa | 413.7 MPa | 15 % | — | — | — | VERIFIED |
| Bar | Drawn and Stress Relieved (HR50)Source values and qualifiersRockwell B Hardness: 96 HRB (TYPICAL)Section Size: 2; Cold Work: 10%; Section Size: 2 inCopper Development Association (CDA) — | 2 | — | — | — | — | — | 96 HRB | VERIFIED |
| Bar | Drawn and Stress Relieved (HR50) · 20 °CSource values and qualifiersTensile Strength: 758.4 MPa (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 427.5 MPa (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 15 % (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 inCopper Development Association (CDA) — | 1 | 758.4 MPa | 427.5 MPa | 15 % | — | — | — | VERIFIED |
| Bar | Drawn and Stress Relieved (HR50)Source values and qualifiersRockwell B Hardness: 97 HRB (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 inCopper Development Association (CDA) — Fatigue Strength: 255.1 MPa (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 in; 10^8 cycles endurance limitCopper Development Association (CDA) — | 1 | — | — | — | — | 255.1 MPa | 97 HRB | VERIFIED |
| Rod | As Hot Extruded (M30) · 20 °CSource values and qualifiersTensile Strength: 689.5 MPa (TYPICAL)Section Size: 4; Section Size: 4 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 413.7 MPa (TYPICAL)Section Size: 4; Section Size: 4 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 15 % (TYPICAL)Section Size: 4; Section Size: 4 inCopper Development Association (CDA) — | 4 | 689.5 MPa | 413.7 MPa | 15 % | — | — | — | VERIFIED |
| Rod | As Hot Extruded (M30)Source values and qualifiersRockwell B Hardness: 96 HRB (TYPICAL)Section Size: 4; Section Size: 4 inCopper Development Association (CDA) — Shear Strength: 427.5 MPa (TYPICAL)Section Size: 4; Section Size: 4 inCopper Development Association (CDA) — Fatigue Strength: 248.2 MPa (TYPICAL)Section Size: 4; Section Size: 4 in; 10^8 cycles endurance limitCopper Development Association (CDA) — | 4 | — | — | — | 427.5 MPa | 248.2 MPa | 96 HRB | VERIFIED |
| Rod | Drawn and Stress Relieved (HR50) · 20 °CSource values and qualifiersTensile Strength: 813.6 MPa (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 517.1 MPa (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 15 % (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 inCopper Development Association (CDA) — | 1 | 813.6 MPa | 517.1 MPa | 15 % | — | — | — | VERIFIED |
| Rod | Drawn and Stress Relieved (HR50)Source values and qualifiersRockwell B Hardness: 98 HRB (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 inCopper Development Association (CDA) — Shear Strength: 482.6 MPa (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 inCopper Development Association (CDA) — Fatigue Strength: 255.1 MPa (TYPICAL)Section Size: 1; Cold Work: 10%; Section Size: 1 in; 10^8 cycles endurance limitCopper Development Association (CDA) — | 1 | — | — | — | 482.6 MPa | 255.1 MPa | 98 HRB | VERIFIED |
| Rod | Drawn and Stress Relieved (HR50) · 20 °CSource values and qualifiersTensile Strength: 792.9 MPa (TYPICAL)Section Size: 2; Cold Work: 10%; Section Size: 2 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 448.2 MPa (TYPICAL)Section Size: 2; Cold Work: 10%; Section Size: 2 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 18 % (TYPICAL)Section Size: 2; Cold Work: 10%; Section Size: 2 inCopper Development Association (CDA) — | 2 | 792.9 MPa | 448.2 MPa | 18 % | — | — | — | VERIFIED |
| Rod | Drawn and Stress Relieved (HR50)Source values and qualifiersRockwell B Hardness: 96 HRB (TYPICAL)Section Size: 2; Cold Work: 10%; Section Size: 2 inCopper Development Association (CDA) — Shear Strength: 475.7 MPa (TYPICAL)Section Size: 2; Cold Work: 10%; Section Size: 2 inCopper Development Association (CDA) — Fatigue Strength: 262 MPa (TYPICAL)Section Size: 2; Cold Work: 10%; Section Size: 2 in; 10^8 cycles endurance limitCopper Development Association (CDA) — | 2 | — | — | — | 475.7 MPa | 262 MPa | 96 HRB | VERIFIED |
| Rod | Drawn and Stress Relieved (HR50) · 20 °CSource values and qualifiersTensile Strength: 772.2 MPa (TYPICAL)Section Size: 3; Cold Work: 10%; Section Size: 3 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 427.5 MPa (TYPICAL)Section Size: 3; Cold Work: 10%; Section Size: 3 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 20 % (TYPICAL)Section Size: 3; Cold Work: 10%; Section Size: 3 inCopper Development Association (CDA) — | 3 | 772.2 MPa | 427.5 MPa | 20 % | — | — | — | VERIFIED |
| Rod | Drawn and Stress Relieved (HR50)Source values and qualifiersRockwell B Hardness: 96 HRB (TYPICAL)Section Size: 3; Cold Work: 10%; Section Size: 3 inCopper Development Association (CDA) — Shear Strength: 448.2 MPa (TYPICAL)Section Size: 3; Cold Work: 10%; Section Size: 3 inCopper Development Association (CDA) — Fatigue Strength: 255.1 MPa (TYPICAL)Section Size: 3; Cold Work: 10%; Section Size: 3 in; 10^8 cycles endurance limitCopper Development Association (CDA) — | 3 | — | — | — | 448.2 MPa | 255.1 MPa | 96 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
Processing & Fabrication Characteristics
Machining, joining, forming, and thermal processing ratings cataloged from the cited authoritative technical reference.
Machinability
Machinability rating: 30% relative to free-cutting brass (C36000 = 100%). Forgeability rating: 75.
Weldability & Joining
Soldering: Not Recommended; Brazing: Fair; Oxyacetylene Welding: Not Recommended; Gas Shielded Arc Welding: Good; Coated Metal Arc Welding: Good; Spot Weld: Good; Seam Weld: Good; Butt Weld: Good
Heat Treatment & Working Ranges
Annealing temperature range: 593.3°C to 704.4°C (1100°F - 1300°F). Hot working temperature range: 787.8°C to 926.7°C (1450°F - 1700°F).
Forming & Cold Working
Capacity for Being Cold Worked: Poor. Capacity for Being Hot Formed: Good.
Comparable Grades & Cross-References
Carefully classified cross-reference relationships for C63000 Nickel-Aluminum Bronze (AMS 4640). Comparable does not mean equivalent.
| Related Material | Family | Relationship Classification | Metallurgical Notes & Differences | Status | Action |
|---|---|---|---|---|---|
| C95400 Aluminum Bronze 9C | Copper Alloys | Commonly Compared | C63000 is wrought nickel-aluminum bronze (AMS 4640 / ASTM B150) providing void-free metallurgical density and higher fatigue strength; C95400 is continuous-cast aluminum bronze (Alloy 9C).Materials serve different design priorities (e.g. higher strength vs superior corrosion resistance or cost). | VERIFIED | Side-by-Side Compare → |
| C63200 Nickel-Aluminum Bronze (Naval Alloy) | Copper Alloys | Commonly Compared | C63000 (AMS 4640) and C63200 (MIL-B-24480) are wrought nickel-aluminum bronzes; C63200 strictly restricts iron content below nickel and tightens manganese limits to ensure high dynamic fracture toughness for naval submarine service. Qualification cannot be inferred from specification name.Materials serve different design priorities (e.g. higher strength vs superior corrosion resistance or cost). | VERIFIED | Side-by-Side Compare → |
Sources & Provenance Trail
Reference publications and standards organization registers cited across this material record.
Copper Development Association Inc.CDA Alloy C63000 Property & Specification Profile
AUTHORITATIVE BODY
Copper Development Association authoritative technical reference profile for C63000 Nickel-Aluminum Bronze (AMS 4640).
Issuing Body: Copper Development Association (CDA)View Source Record ↗
Copper Development Association Inc.CDA UNS Standard Designations Register (C63000)
AUTHORITATIVE BODY
Unified Numbering System (UNS) designation registration register confirming active C63000 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.