UNS C96800 Nickel-Tin Copper
C96800 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 highest thermal conductivity among cast copper-nickels. In addition, it has a fairly low ductility and a fairly high tensile strength.
The graph bars on the material properties cards below compare C96800 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
Elastic (Young's, Tensile) Modulus
120 GPa 18 x 106 psi
Elongation at Break
3.4 %
Poisson's Ratio
0.34
Shear Modulus
46 GPa 6.7 x 106 psi
Tensile Strength: Ultimate (UTS)
1010 MPa 150 x 103 psi
Tensile Strength: Yield (Proof)
860 MPa 120 x 103 psi
Thermal Properties
Latent Heat of Fusion
220 J/g
Maximum Temperature: Mechanical
220 °C 430 °F
Melting Completion (Liquidus)
1120 °C 2040 °F
Melting Onset (Solidus)
1060 °C 1940 °F
Specific Heat Capacity
390 J/kg-K 0.094 BTU/lb-°F
Thermal Conductivity
52 W/m-K 30 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
10 % IACS
Electrical Conductivity: Equal Weight (Specific)
10 % IACS
Otherwise Unclassified Properties
Base Metal Price
34 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
3.4 kg CO2/kg material
Embodied Energy
52 MJ/kg 22 x 103 BTU/lb
Embodied Water
300 L/kg 36 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
33 MJ/m3
Resilience: Unit (Modulus of Resilience)
3000 kJ/m3
Stiffness to Weight: Axial
7.6 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
32 points
Strength to Weight: Bending
25 points
Thermal Diffusivity
15 mm2/s
Thermal Shock Resistance
35 points
Alloy Composition
Among cast copper alloys, the composition of C96800 copper is notable for containing a comparatively high amount of nickel (Ni) and including manganese (Mn). Nickel is used to improve strength (particularly at elevated temperatures) and corrosion resistance. It also creates the need for additional care during casting. Manganese is used to improve strength without a proportional reduction in ductility.
| Cu | 87.1 to 90.5 | |
| Ni | 9.5 to 10.5 | |
| Zn | 0 to 1.0 | |
| Fe | 0 to 0.5 | |
| Mn | 0.050 to 0.3 | |
| Al | 0 to 0.1 | |
| Sb | 0 to 0.020 | |
| P | 0 to 0.0050 | |
| Pb | 0 to 0.0050 | |
| S | 0 to 0.0025 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.