Special-Spring (H12) C15500 Copper
H12 C15500 copper is C15500 copper in the H12 (special spring). It has the second highest strength compared to the other variants of C15500 copper. The graph bars on the material properties cards below compare H12 C15500 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
3.0 %
Poisson's Ratio
0.34
Rockwell B Hardness
82
Shear Modulus
43 GPa 6.3 x 106 psi
Shear Strength
300 MPa 43 x 103 psi
Tensile Strength: Ultimate (UTS)
520 MPa 75 x 103 psi
Tensile Strength: Yield (Proof)
510 MPa 75 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)
1080 °C 1970 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
350 W/m-K 200 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
90 % IACS
Electrical Conductivity: Equal Weight (Specific)
91 % IACS
Otherwise Unclassified Properties
Base Metal Price
33 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
2.7 kg CO2/kg material
Embodied Energy
42 MJ/kg 18 x 103 BTU/lb
Embodied Water
360 L/kg 43 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
15 MJ/m3
Resilience: Unit (Modulus of Resilience)
1140 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
100 mm2/s
Thermal Shock Resistance
18 points
Alloy Composition
| Cu | 99.75 to 99.853 | |
| Mg | 0.080 to 0.13 | |
| Ag | 0.027 to 0.1 | |
| P | 0.040 to 0.080 | |
| res. | 0 to 0.2 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
Copper Alloys: Preparation, Properties and Applications, Michael Naboka and Jennifer Giordano (editors), 2013