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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.

Copper (Cu) 87.1 to 90.5
Nickel (Ni) 9.5 to 10.5
Zinc (Zn) 0 to 1.0
Iron (Fe) 0 to 0.5
Manganese (Mn) 0.050 to 0.3
Aluminum (Al) 0 to 0.1
Antimony (Sb) 0 to 0.020
Phosphorus (P) 0 to 0.0050
Lead (Pb) 0 to 0.0050
Sulfur (S) 0 to 0.0025
Residuals 0 to 0.5

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

Followup Questions

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