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UNS C96200 Copper-Nickel

C96200 copper-nickel is a copper-nickel alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. C96200 is the UNS number for this material. Additionally, the common industry name is Cast 90-10 Copper-Nickel. Older literature may refer to this material as ASTM Copper-Nickel Type A, but this is now discouraged.

It has a fairly high electrical conductivity among cast copper-nickels. In addition, it has a fairly high ductility and a moderately high thermal conductivity.

The graph bars on the material properties cards below compare C96200 copper-nickel 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

23 %

Poisson's Ratio

0.34

Shear Modulus

46 GPa 6.7 x 106 psi

Tensile Strength: Ultimate (UTS)

350 MPa 51 x 103 psi

Tensile Strength: Yield (Proof)

190 MPa 28 x 103 psi

Thermal Properties

Latent Heat of Fusion

220 J/g

Maximum Temperature: Mechanical

220 °C 430 °F

Melting Completion (Liquidus)

1150 °C 2100 °F

Melting Onset (Solidus)

1100 °C 2010 °F

Specific Heat Capacity

390 J/kg-K 0.094 BTU/lb-°F

Thermal Conductivity

45 W/m-K 26 BTU/h-ft-°F

Thermal Expansion

17 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

11 % IACS

Electrical Conductivity: Equal Weight (Specific)

11 % IACS

Otherwise Unclassified Properties

Base Metal Price

36 % relative

Density

8.9 g/cm3 550 lb/ft3

Embodied Carbon

3.8 kg CO2/kg material

Embodied Energy

58 MJ/kg 25 x 103 BTU/lb

Embodied Water

300 L/kg 35 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

68 MJ/m3

Resilience: Unit (Modulus of Resilience)

150 kJ/m3

Stiffness to Weight: Axial

7.8 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

11 points

Strength to Weight: Bending

13 points

Thermal Diffusivity

13 mm2/s

Thermal Shock Resistance

12 points

Alloy Composition

Among cast copper alloys, the composition of C96200 copper-nickel is notable for containing comparatively high amounts of nickel (Ni) and iron (Fe). Nickel is used to improve strength (particularly at elevated temperatures) and corrosion resistance. It also creates the need for additional care during casting. Iron is used to increase strength inexpensively.

Copper (Cu) 83.6 to 90
Nickel (Ni) 9.0 to 11
Iron (Fe) 1.0 to 1.8
Manganese (Mn) 0 to 1.5
Niobium (Nb) 0 to 1.0
Silicon (Si) 0 to 0.5
Carbon (C) 0 to 0.1
Phosphorus (P) 0 to 0.020
Sulfur (S) 0 to 0.020
Lead (Pb) 0 to 0.010
Residuals 0 to 0.5

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

Followup Questions

Similar Alloys

Further Reading

ASTM B369: Standard Specification for Copper-Nickel Alloy Castings

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015