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.
| Cu | 76.8 to 85 | |
| Al | 9.0 to 11 | |
| Ni | 4.0 to 5.5 | |
| Fe | 2.0 to 4.0 | |
| Mn | 0 to 1.5 | |
| Zn | 0 to 0.3 | |
| Si | 0 to 0.25 | |
| Sn | 0 to 0.2 | |
| res. | 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