Spring-Tempered (H08) C19700 Copper
H08 C19700 copper is C19700 copper in the H08 (spring) temper. It has the second highest strength and lowest ductility compared to the other variants of C19700 copper. The graph bars on the material properties cards below compare H08 C19700 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
2.4 %
Poisson's Ratio
0.34
Rockwell B Hardness
74
Rockwell Superficial 30T Hardness
71
Shear Modulus
43 GPa 6.3 x 106 psi
Shear Strength
290 MPa 42 x 103 psi
Tensile Strength: Ultimate (UTS)
500 MPa 73 x 103 psi
Tensile Strength: Yield (Proof)
470 MPa 68 x 103 psi
Thermal Properties
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
200 °C 390 °F
Melting Completion (Liquidus)
1090 °C 2000 °F
Melting Onset (Solidus)
1040 °C 1900 °F
Specific Heat Capacity
390 J/kg-K 0.093 BTU/lb-°F
Thermal Conductivity
250 W/m-K 140 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
86 % IACS
Electrical Conductivity: Equal Weight (Specific)
87 % IACS
Otherwise Unclassified Properties
Base Metal Price
30 % relative
Density
8.9 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
310 L/kg 37 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
12 MJ/m3
Resilience: Unit (Modulus of Resilience)
940 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
16 points
Strength to Weight: Bending
16 points
Thermal Diffusivity
73 mm2/s
Thermal Shock Resistance
18 points
Alloy Composition
| Cu | 97.4 to 99.59 | |
| Fe | 0.3 to 1.2 | |
| P | 0.1 to 0.4 | |
| Mg | 0.010 to 0.2 | |
| Sn | 0 to 0.2 | |
| Zn | 0 to 0.2 | |
| Mn | 0 to 0.050 | |
| Ni | 0 to 0.050 | |
| Co | 0 to 0.050 | |
| 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 B465: Standard Specification for Copper-Iron Alloy Plate, Sheet, Strip, and Rolled Bar
Copper Alloys: Preparation, Properties and Applications, Michael Naboka and Jennifer Giordano (editors), 2013