Annealed (O61) C71000 Copper-Nickel
O61 C71000 copper-nickel is C71000 copper-nickel in the O61 (annealed) temper. It has the second lowest strength compared to the other variants of C71000 copper-nickel. The graph bars on the material properties cards below compare O61 C71000 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
Brinell Hardness
73
Elastic (Young's, Tensile) Modulus
130 GPa 19 x 106 psi
Elongation at Break
39 %
Poisson's Ratio
0.33
Shear Modulus
49 GPa 7.1 x 106 psi
Shear Strength
230 MPa 34 x 103 psi
Tensile Strength: Ultimate (UTS)
340 MPa 49 x 103 psi
Tensile Strength: Yield (Proof)
120 MPa 17 x 103 psi
Thermal Properties
Latent Heat of Fusion
230 J/g
Maximum Temperature: Mechanical
240 °C 460 °F
Melting Completion (Liquidus)
1200 °C 2190 °F
Melting Onset (Solidus)
1150 °C 2100 °F
Specific Heat Capacity
400 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
43 W/m-K 25 BTU/h-ft-°F
Thermal Expansion
15 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
6.5 % IACS
Electrical Conductivity: Equal Weight (Specific)
6.6 % IACS
Otherwise Unclassified Properties
Base Metal Price
37 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
4.3 kg CO2/kg material
Embodied Energy
63 MJ/kg 27 x 103 BTU/lb
Embodied Water
290 L/kg 35 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
100 MJ/m3
Resilience: Unit (Modulus of Resilience)
53 kJ/m3
Stiffness to Weight: Axial
8.2 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
11 points
Strength to Weight: Bending
12 points
Thermal Diffusivity
12 mm2/s
Thermal Shock Resistance
12 points
Alloy Composition
| Cu | 73.5 to 80.5 | |
| Ni | 19 to 23 | |
| Fe | 0.5 to 1.0 | |
| Mn | 0 to 1.0 | |
| 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