Extra-Spring (H10) C12900 Copper
H10 C12900 copper is C12900 copper in the H10 (extra spring) temper. It has the second highest strength and second lowest ductility compared to the other variants of C12900 copper. The graph bars on the material properties cards below compare H10 C12900 copper to: wrought coppers (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 17 x 106 psi
Elongation at Break
4.0 %
Poisson's Ratio
0.34
Rockwell B Hardness
62
Rockwell F Hardness
95
Rockwell Superficial 30T Hardness
64
Shear Modulus
43 GPa 6.3 x 106 psi
Shear Strength
200 MPa 29 x 103 psi
Tensile Strength: Ultimate (UTS)
390 MPa 57 x 103 psi
Tensile Strength: Yield (Proof)
380 MPa 56 x 103 psi
Thermal Properties
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
200 °C 390 °F
Melting Completion (Liquidus)
1080 °C 1980 °F
Melting Onset (Solidus)
1030 °C 1880 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
380 W/m-K 220 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
98 % IACS
Electrical Conductivity: Equal Weight (Specific)
98 % IACS
Otherwise Unclassified Properties
Base Metal Price
32 % relative
Density
9.0 g/cm3 560 lb/ft3
Embodied Carbon
2.6 kg CO2/kg material
Embodied Energy
41 MJ/kg 18 x 103 BTU/lb
Embodied Water
330 L/kg 39 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
16 MJ/m3
Resilience: Unit (Modulus of Resilience)
640 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
12 points
Strength to Weight: Bending
13 points
Thermal Diffusivity
110 mm2/s
Thermal Shock Resistance
14 points
Alloy Composition
| Cu | 99.88 to 100 | |
| Ag | 0 to 0.054 | |
| Ni | 0 to 0.050 | |
| Te | 0 to 0.025 | |
| As | 0 to 0.012 | |
| Pb | 0 to 0.0040 | |
| Bi | 0 to 0.0030 | |
| Sb | 0 to 0.0030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015