UNS C63200 Aluminum-Nickel Bronze
C63200 bronze is a bronze formulated for primary forming into wrought products. It has a moderately low electrical conductivity among wrought bronzes. In addition, it has a fairly low thermal conductivity and a moderately high heat capacity.
The properties of C63200 bronze include three 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 C63200 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
17 to 18 %
Poisson's Ratio
0.34
Rockwell B Hardness
88
Shear Modulus
44 GPa 6.4 x 106 psi
Shear Strength
390 to 440 MPa 57 to 63 x 103 psi
Tensile Strength: Ultimate (UTS)
640 to 710 MPa 92 to 100 x 103 psi
Tensile Strength: Yield (Proof)
310 to 350 MPa 45 to 51 x 103 psi
Thermal Properties
Latent Heat of Fusion
230 J/g
Maximum Temperature: Mechanical
230 °C 450 °F
Melting Completion (Liquidus)
1060 °C 1940 °F
Melting Onset (Solidus)
1040 °C 1910 °F
Specific Heat Capacity
440 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
35 W/m-K 20 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
8.3 g/cm3 520 lb/ft3
Embodied Carbon
3.4 kg CO2/kg material
Embodied Energy
55 MJ/kg 24 x 103 BTU/lb
Embodied Water
380 L/kg 45 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
95 to 99 MJ/m3
Resilience: Unit (Modulus of Resilience)
400 to 510 kJ/m3
Stiffness to Weight: Axial
7.9 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
21 to 24 points
Strength to Weight: Bending
20 to 21 points
Thermal Diffusivity
9.6 mm2/s
Thermal Shock Resistance
22 to 24 points
Alloy Composition
Among wrought copper alloys, the composition of C63200 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 | 78.8 to 82.6 | |
| Al | 8.7 to 9.5 | |
| Ni | 4.0 to 4.8 | |
| Fe | 3.5 to 4.3 | |
| Mn | 1.2 to 2.0 | |
| Si | 0 to 0.1 | |
| Pb | 0 to 0.020 | |
| 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)
Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015