Soft Annealed (O60) C70620 Copper-Nickel
O60 C70620 copper-nickel is C70620 copper-nickel in the O60 (soft annealed) temper. It has the lowest strength compared to the other variants of C70620 copper-nickel. The graph bars on the material properties cards below compare O60 C70620 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
120 GPa 18 x 106 psi
Elongation at Break
34 %
Poisson's Ratio
0.34
Shear Modulus
46 GPa 6.7 x 106 psi
Shear Strength
200 MPa 29 x 103 psi
Tensile Strength: Ultimate (UTS)
300 MPa 43 x 103 psi
Tensile Strength: Yield (Proof)
120 MPa 17 x 103 psi
Thermal Properties
Latent Heat of Fusion
220 J/g
Maximum Temperature: Mechanical
220 °C 430 °F
Melting Completion (Liquidus)
1120 °C 2050 °F
Melting Onset (Solidus)
1060 °C 1950 °F
Specific Heat Capacity
390 J/kg-K 0.094 BTU/lb-°F
Thermal Conductivity
49 W/m-K 28 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
33 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
3.4 kg CO2/kg material
Embodied Energy
51 MJ/kg 22 x 103 BTU/lb
Embodied Water
300 L/kg 35 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
81 MJ/m3
Resilience: Unit (Modulus of Resilience)
56 kJ/m3
Stiffness to Weight: Axial
7.7 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
9.3 points
Strength to Weight: Bending
11 points
Thermal Diffusivity
14 mm2/s
Thermal Shock Resistance
10 points
Alloy Composition
| Cu | 86.5 to 90 | |
| Ni | 9.0 to 11 | |
| Fe | 1.0 to 1.8 | |
| Mn | 0 to 1.0 | |
| Zn | 0 to 0.5 | |
| P | 0 to 0.2 | |
| C | 0 to 0.050 | |
| S | 0 to 0.020 | |
| Pb | 0 to 0.020 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B151: Standard Specification for Copper-Nickel-Zinc Alloy (Nickel Silver) and Copper-Nickel Rod and Bar
ASTM B124: Standard Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes
ASTM B283: Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed)
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015