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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 or guaranteed lot conformity. Read engineering disclaimer →
Data Completeness:8 composition elements and 50 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
7.584 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.
C63000 Nickel-Aluminum Bronze (AMS 4640) Documented Applications
- ›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
C63000 Nickel-Aluminum Bronze (AMS 4640) 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 IdentifiersScroll horizontally for full designation data
| 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 ListedScroll horizontally for full alias classifications
| 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 StandardsScroll horizontally for full standard specifications
| 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.
C63000 Nickel-Aluminum Bronze (AMS 4640) 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 |
| 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:
C63000 Nickel-Aluminum Bronze (AMS 4640) Physical Properties
Source-specific physical properties. Test temperatures are shown only where reported.
Scroll horizontally for full property parameters
| 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 |
C63000 Nickel-Aluminum Bronze (AMS 4640) Thermal & Thermodynamic Properties
Phase change temperatures, thermal conductivity, specific heat, mean coefficients of thermal expansion across standardized temperature ranges, and recommended thermal processing windows.
Scroll horizontally for full property parameters
| 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 |
C63000 Nickel-Aluminum Bronze (AMS 4640) Electrical Properties
Electrical conductivity and resistivity in their reported units and conditions.
Scroll horizontally for full property parameters
| 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 |
C63000 Nickel-Aluminum Bronze (AMS 4640) 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
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
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 |
|---|---|---|---|---|---|---|---|---|---|
| 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
C63000 Nickel-Aluminum Bronze (AMS 4640) Processing & Fabrication
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.
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 C63000 Nickel-Aluminum Bronze (AMS 4640) states: Machinability rating: 30% relative to free-cutting brass (C36000 = 100%). Forgeability rating: 75. A relevant hardness example is Rockwell B Hardness: 96 HRB (typical; As Hot Extruded (M30), M30, Bar, 3). 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: 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 The first cataloged strength example is Tensile Strength: 620.5 MPa (typical; As Hot Extruded (M30), M30, Bar, 3; 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: 39.11 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 Sn maximum 0.2 wt%, Zn maximum 0.3 wt%. Chemistry documents identity; it does not establish fluid compatibility.
Selection trade-offs & applications
Use UNS C63000, COMMERCIAL Nickel-Aluminum Bronze (AMS 4640), CDA Alloy 630 to identify the candidate, then specify the product form and delivered condition separately. The catalog lists Aircraft Parts: Friction & Wear Properties as an application example. The related candidate C95400 Aluminum Bronze 9C 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)
C63000 Nickel-Aluminum Bronze (AMS 4640) Equivalent & Comparable Grades
Comparable Grades & Cross-References: Carefully classified cross-reference relationships for C63000 Nickel-Aluminum Bronze (AMS 4640). Comparable does not mean equivalent.
Scroll horizontally for relationship classifications & comparisons
| 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 | |
| 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 |
Aluminum Bronze Alloy Family
Copper alloys sharing common alloying formulations and metallurgical classifications under the Aluminum Bronze branch.
C63000Current Grade
C63000 Nickel-Aluminum Bronze (AMS 4640)
Related Engineering & Metallurgy Guides
Contextual technical guides explaining degradation mechanisms, testing methodologies, and selection criteria relevant to C63000 Nickel-Aluminum Bronze (AMS 4640).
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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.
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Sources
Sources & Provenance Trail: Authoritative reference publications, standards specifications, and data 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.