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UNS C63000 (CW307G) Aluminum-Nickel Bronze

C63000 bronze is a bronze formulated for primary forming into wrought products. CW307G is the EN numeric designation for this material. C63000 is the UNS number. Additionally, the EN chemical designation is CuAl10Ni5Fe4. And the British Standard (BS) designation is CA104.

It has a moderately low electrical conductivity among wrought bronzes. In addition, it has a moderately high heat capacity and a moderately high melting temperature.

The properties of C63000 bronze include five common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C63000 bronze to: wrought bronzes (top), all copper alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

120 GPa 17 x 106 psi

Elongation at Break

7.9 to 15 %

Poisson's Ratio

0.34

Shear Modulus

44 GPa 6.3 x 106 psi

Shear Strength

400 to 470 MPa 58 to 68 x 103 psi

Tensile Strength: Ultimate (UTS)

660 to 790 MPa 95 to 110 x 103 psi

Tensile Strength: Yield (Proof)

330 to 390 MPa 48 to 56 x 103 psi

Thermal Properties

Latent Heat of Fusion

230 J/g

Maximum Temperature: Mechanical

230 °C 450 °F

Melting Completion (Liquidus)

1050 °C 1930 °F

Melting Onset (Solidus)

1040 °C 1900 °F

Specific Heat Capacity

440 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

39 W/m-K 23 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

7.6 % IACS

Otherwise Unclassified Properties

Base Metal Price

29 % relative

Density

8.2 g/cm3 510 lb/ft3

Embodied Carbon

3.5 kg CO2/kg material

Embodied Energy

57 MJ/kg 24 x 103 BTU/lb

Embodied Water

390 L/kg 46 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

47 to 82 MJ/m3

Resilience: Unit (Modulus of Resilience)

470 to 640 kJ/m3

Stiffness to Weight: Axial

7.9 points

Stiffness to Weight: Bending

20 points

Strength to Weight: Axial

22 to 26 points

Strength to Weight: Bending

20 to 23 points

Thermal Diffusivity

11 mm2/s

Thermal Shock Resistance

23 to 27 points

Alloy Composition

Among wrought copper alloys, the composition of C63000 bronze is notable for including aluminum (Al) and silicon (Si). Aluminum is used to add strength and oxidation resistance. Silicon is used to increase strength at the expense of ductility. It also lowers the melting temperature and raises the fluidity of the alloy.

Copper (Cu) 76.8 to 85
Aluminum (Al) 9.0 to 11
Nickel (Ni) 4.0 to 5.5
Iron (Fe) 2.0 to 4.0
Manganese (Mn) 0 to 1.5
Zinc (Zn) 0 to 0.3
Silicon (Si) 0 to 0.25
Tin (Sn) 0 to 0.2
Residuals 0 to 0.5

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B150: Standard Specification for Aluminum Bronze Rod, Bar, and Shapes

ASTM B124: Standard Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes

ASTM B283: Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed)

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001