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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

Copper (Cu) 65 to 71.6
Nickel (Ni) 28 to 33
Iron (Fe) 0.4 to 1.0
Manganese (Mn) 0 to 1.0
Zinc (Zn) 0 to 0.5
Phosphorus (P) 0 to 0.2
Carbon (C) 0 to 0.050
Sulfur (S) 0 to 0.020
Lead (Pb) 0 to 0.020
Residuals 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