Annealed (OS035) C78200 Nickel Silver
OS035 C78200 nickel silver is C78200 nickel silver in the OS035 (annealed to 0.035mm grain size) temper. It has the lowest strength and highest ductility compared to the other variants of C78200 nickel silver.
The graph bars on the material properties cards below compare OS035 C78200 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
110 GPa 16 x 106 psi
Elongation at Break
40 %
Poisson's Ratio
0.32
Rockwell F Hardness
78
Shear Modulus
43 GPa 6.2 x 106 psi
Shear Strength
280 MPa 40 x 103 psi
Tensile Strength: Ultimate (UTS)
370 MPa 53 x 103 psi
Tensile Strength: Yield (Proof)
170 MPa 25 x 103 psi
Thermal Properties
Latent Heat of Fusion
190 J/g
Maximum Temperature: Mechanical
160 °C 320 °F
Melting Completion (Liquidus)
1000 °C 1830 °F
Melting Onset (Solidus)
970 °C 1780 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
48 W/m-K 28 BTU/h-ft-°F
Thermal Expansion
19 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
11 % IACS
Electrical Conductivity: Equal Weight (Specific)
12 % IACS
Otherwise Unclassified Properties
Base Metal Price
28 % relative
Density
8.4 g/cm3 520 lb/ft3
Embodied Carbon
3.3 kg CO2/kg material
Embodied Energy
52 MJ/kg 22 x 103 BTU/lb
Embodied Water
310 L/kg 37 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m3
Resilience: Unit (Modulus of Resilience)
130 kJ/m3
Stiffness to Weight: Axial
7.4 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
12 points
Strength to Weight: Bending
14 points
Thermal Diffusivity
15 mm2/s
Thermal Shock Resistance
12 points
Alloy Composition
| Cu | 63 to 67 | |
| Zn | 20.2 to 28.5 | |
| Ni | 7.0 to 9.0 | |
| Pb | 1.5 to 2.5 | |
| Mn | 0 to 0.5 | |
| Fe | 0 to 0.35 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
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