Super-Spring (H14) C72500 Copper-Nickel
H14 C72500 copper-nickel is C72500 copper-nickel in the H14 (super spring) temper. It has the highest strength compared to the other variants of C72500 copper-nickel. The graph bars on the material properties cards below compare H14 C72500 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
Rockwell B Hardness
100
Rockwell Superficial 30T Hardness
89
Shear Modulus
45 GPa 6.6 x 106 psi
Tensile Strength: Ultimate (UTS)
780 MPa 110 x 103 psi
Thermal Properties
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
210 °C 410 °F
Melting Completion (Liquidus)
1130 °C 2060 °F
Melting Onset (Solidus)
1060 °C 1940 °F
Specific Heat Capacity
390 J/kg-K 0.093 BTU/lb-°F
Thermal Conductivity
54 W/m-K 31 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
11 % IACS
Electrical Conductivity: Equal Weight (Specific)
11 % IACS
Otherwise Unclassified Properties
Base Metal Price
35 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
3.6 kg CO2/kg material
Embodied Energy
55 MJ/kg 24 x 103 BTU/lb
Embodied Water
320 L/kg 38 gal/lb
Common Calculations
Stiffness to Weight: Axial
7.6 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
24 points
Strength to Weight: Bending
21 points
Thermal Diffusivity
16 mm2/s
Thermal Shock Resistance
27 points
Alloy Composition
| Cu | 85.2 to 89.7 | |
| Ni | 8.5 to 10.5 | |
| Sn | 1.8 to 2.8 | |
| Fe | 0 to 0.6 | |
| Zn | 0 to 0.5 | |
| Mn | 0 to 0.2 | |
| Pb | 0 to 0.050 | |
| res. | 0 to 0.2 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B122: Standard Specification for Copper-Nickel-Tin Alloy, Copper-Nickel-Zinc Alloy (Nickel Silver), and Copper-Nickel Alloy Plate, Sheet, Strip, and Rolled Bar
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001