Annealed (O61) C70400 Copper-Nickel
O61 C70400 copper-nickel is C70400 copper-nickel in the O61 (annealed) temper. The graph bars on the material properties cards below compare O61 C70400 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
Poisson's Ratio
0.34
Shear Modulus
45 GPa 6.6 x 106 psi
Tensile Strength: Ultimate (UTS)
300 MPa 43 x 103 psi
Tensile Strength: Yield (Proof)
95 MPa 14 x 103 psi
Thermal Properties
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
210 °C 410 °F
Melting Completion (Liquidus)
1120 °C 2050 °F
Melting Onset (Solidus)
1060 °C 1950 °F
Specific Heat Capacity
390 J/kg-K 0.093 BTU/lb-°F
Thermal Conductivity
64 W/m-K 37 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
14 % IACS
Electrical Conductivity: Equal Weight (Specific)
14 % IACS
Otherwise Unclassified Properties
Base Metal Price
32 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
3.0 kg CO2/kg material
Embodied Energy
47 MJ/kg 20 x 103 BTU/lb
Embodied Water
300 L/kg 36 gal/lb
Common Calculations
Resilience: Unit (Modulus of Resilience)
38 kJ/m3
Stiffness to Weight: Axial
7.5 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
9.3 points
Strength to Weight: Bending
11 points
Thermal Diffusivity
18 mm2/s
Thermal Shock Resistance
10 points
Alloy Composition
| Cu | 89.8 to 93.6 | |
| Ni | 4.8 to 6.2 | |
| Fe | 1.3 to 1.7 | |
| Mn | 0.3 to 0.8 | |
| Zn | 0 to 1.0 | |
| Pb | 0 to 0.050 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B111: Standard Specification for Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001