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As Hot Rolled (M20) C74500 Nickel Silver

M20 C74500 nickel silver is C74500 nickel silver in the M20 (as hot rolled) condition. It has the lowest strength compared to the other variants of C74500 nickel silver. The graph bars on the material properties cards below compare M20 C74500 nickel silver 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

120 GPa 17 x 106 psi

Poisson's Ratio

0.32

Shear Modulus

44 GPa 6.4 x 106 psi

Tensile Strength: Ultimate (UTS)

390 MPa 57 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

1020 °C 1870 °F

Melting Onset (Solidus)

970 °C 1780 °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

19 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

9.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

9.7 % IACS

Otherwise Unclassified Properties

Base Metal Price

29 % relative

Density

8.3 g/cm3 520 lb/ft3

Embodied Carbon

3.4 kg CO2/kg material

Embodied Energy

54 MJ/kg 23 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

12 to 160 MJ/m3

Resilience: Unit (Modulus of Resilience)

620 to 1540 kJ/m3

Stiffness to Weight: Axial

7.7 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

13 points

Strength to Weight: Bending

14 points

Thermal Diffusivity

14 mm2/s

Thermal Shock Resistance

13 points

Alloy Composition

Copper (Cu) 63.5 to 66.5
Zinc (Zn) 21.2 to 27.5
Nickel (Ni) 9.0 to 11
Manganese (Mn) 0 to 0.5
Iron (Fe) 0 to 0.25
Lead (Pb) 0 to 0.1
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

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001