Spring-Tempered (H08) C12900 Copper
H08 C12900 copper is C12900 copper in the H08 (spring) temper. It has the highest strength and lowest ductility compared to the other variants of C12900 copper. The graph bars on the material properties cards below compare H08 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
2.8 %
Poisson's Ratio
0.34
Rockwell B Hardness
60
Rockwell F Hardness
94
Rockwell Superficial 30T Hardness
63
Shear Modulus
43 GPa 6.3 x 106 psi
Shear Strength
210 MPa 31 x 103 psi
Tensile Strength: Ultimate (UTS)
420 MPa 61 x 103 psi
Tensile Strength: Yield (Proof)
370 MPa 53 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)
11 MJ/m3
Resilience: Unit (Modulus of Resilience)
580 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
13 points
Strength to Weight: Bending
14 points
Thermal Diffusivity
110 mm2/s
Thermal Shock Resistance
15 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