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As Hot Rolled (M20) C71500 Copper-Nickel

M20 C71500 copper-nickel is C71500 copper-nickel in the M20 (as hot rolled) condition. It has the lowest strength compared to the other variants of C71500 copper-nickel. The graph bars on the material properties cards below compare M20 C71500 copper-nickel to: wrought 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

140 GPa 20 x 106 psi

Poisson's Ratio

0.33

Shear Modulus

52 GPa 7.5 x 106 psi

Tensile Strength: Ultimate (UTS)

380 MPa 55 x 103 psi

Thermal Properties

Latent Heat of Fusion

230 J/g

Maximum Temperature: Mechanical

260 °C 500 °F

Melting Completion (Liquidus)

1240 °C 2260 °F

Melting Onset (Solidus)

1170 °C 2140 °F

Specific Heat Capacity

400 J/kg-K 0.1 BTU/lb-°F

Thermal Conductivity

28 W/m-K 16 BTU/h-ft-°F

Thermal Expansion

16 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

4.6 % IACS

Electrical Conductivity: Equal Weight (Specific)

4.7 % IACS

Otherwise Unclassified Properties

Base Metal Price

41 % relative

Calomel Potential

-250 mV

Density

8.9 g/cm3 560 lb/ft3

Embodied Carbon

5.1 kg CO2/kg material

Embodied Energy

74 MJ/kg 32 x 103 BTU/lb

Embodied Water

280 L/kg 34 gal/lb

Common Calculations

Stiffness to Weight: Axial

8.6 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

12 points

Strength to Weight: Bending

13 points

Thermal Diffusivity

7.7 mm2/s

Thermal Shock Resistance

12 points

Alloy Composition

Copper (Cu) 63.5 to 70.6
Nickel (Ni) 29 to 33
Iron (Fe) 0.4 to 1.0
Manganese (Mn) 0 to 1.0
Zinc (Zn) 0 to 1.0
Lead (Pb) 0 to 0.050
Residuals 0 to 0.5

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

Followup Questions

Further Reading

ASTM B122: Standard Specification for Copper-Nickel-Tin Alloy, Copper-Nickel-Zinc Alloy (Nickel Silver), and Copper-Nickel Alloy Plate, Sheet, Strip, and Rolled Bar

Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001

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