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
| Cu | 63.5 to 66.5 | |
| Zn | 21.2 to 27.5 | |
| Ni | 9.0 to 11 | |
| Mn | 0 to 0.5 | |
| Fe | 0 to 0.25 | |
| Pb | 0 to 0.1 | |
| res. | 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