Soft Annealed (O60) C71520 Copper-Nickel
O60 C71520 copper-nickel is C71520 copper-nickel in the O60 (soft annealed) temper. It has the lowest strength compared to the other variants of C71520 copper-nickel. The graph bars on the material properties cards below compare O60 C71520 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
Elongation at Break
34 %
Poisson's Ratio
0.33
Shear Modulus
51 GPa 7.5 x 106 psi
Shear Strength
250 MPa 36 x 103 psi
Tensile Strength: Ultimate (UTS)
370 MPa 54 x 103 psi
Tensile Strength: Yield (Proof)
140 MPa 20 x 103 psi
Thermal Properties
Latent Heat of Fusion
230 J/g
Maximum Temperature: Mechanical
260 °C 500 °F
Melting Completion (Liquidus)
1170 °C 2150 °F
Melting Onset (Solidus)
1120 °C 2040 °F
Specific Heat Capacity
400 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
32 W/m-K 19 BTU/h-ft-°F
Thermal Expansion
15 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
5.7 % IACS
Electrical Conductivity: Equal Weight (Specific)
5.8 % IACS
Otherwise Unclassified Properties
Base Metal Price
40 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
5.0 kg CO2/kg material
Embodied Energy
73 MJ/kg 31 x 103 BTU/lb
Embodied Water
280 L/kg 34 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
99 MJ/m3
Resilience: Unit (Modulus of Resilience)
67 kJ/m3
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
8.9 mm2/s
Thermal Shock Resistance
12 points
Alloy Composition
| Cu | 65 to 71.6 | |
| Ni | 28 to 33 | |
| Fe | 0.4 to 1.0 | |
| 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)
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001