UNS C99300 Nickel-Aluminum Copper
C99300 copper is a copper-nickel alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. It has the lowest ductility among cast copper-nickels. In addition, it has a moderately low base cost and a moderately high tensile strength.
The graph bars on the material properties cards below compare C99300 copper to: cast copper-nickels (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
Brinell Hardness
200
Elastic (Young's, Tensile) Modulus
120 GPa 18 x 106 psi
Elongation at Break
2.0 %
Poisson's Ratio
0.33
Shear Modulus
46 GPa 6.7 x 106 psi
Tensile Strength: Ultimate (UTS)
660 MPa 95 x 103 psi
Tensile Strength: Yield (Proof)
380 MPa 55 x 103 psi
Thermal Properties
Latent Heat of Fusion
240 J/g
Maximum Temperature: Mechanical
250 °C 480 °F
Melting Completion (Liquidus)
1080 °C 1970 °F
Melting Onset (Solidus)
1070 °C 1950 °F
Specific Heat Capacity
450 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
43 W/m-K 25 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
9.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
9.8 % IACS
Otherwise Unclassified Properties
Base Metal Price
35 % relative
Density
8.2 g/cm3 510 lb/ft3
Embodied Carbon
4.5 kg CO2/kg material
Embodied Energy
70 MJ/kg 30 x 103 BTU/lb
Embodied Water
400 L/kg 48 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
11 MJ/m3
Resilience: Unit (Modulus of Resilience)
590 kJ/m3
Stiffness to Weight: Axial
8.3 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
22 points
Strength to Weight: Bending
20 points
Thermal Diffusivity
12 mm2/s
Thermal Shock Resistance
22 points
Alloy Composition
Among cast copper alloys, the composition of C99300 copper is notable for including cobalt (Co) and containing a comparatively high amount of aluminum (Al). Cobalt is used to improve strength. Aluminum is used to add strength and oxidation resistance, at the cost of requiring additional care during casting.
| Cu | 68.6 to 74.4 | |
| Ni | 13.5 to 16.5 | |
| Al | 10.7 to 11.5 | |
| Co | 1.0 to 2.0 | |
| Fe | 0.4 to 1.0 | |
| Sn | 0 to 0.050 | |
| Si | 0 to 0.020 | |
| Pb | 0 to 0.020 | |
| res. | 0 to 0.3 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993