TM04 Mill Hardened C70260 Copper
TM04 C70260 copper is C70260 copper in the TM04 (mill hardened to full-hard) temper. It has the highest strength and lowest ductility compared to the other variants of C70260 copper. The graph bars on the material properties cards below compare TM04 C70260 copper 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 17 x 106 psi
Elongation at Break
9.5 %
Poisson's Ratio
0.34
Shear Modulus
44 GPa 6.3 x 106 psi
Shear Strength
450 MPa 65 x 103 psi
Tensile Strength: Ultimate (UTS)
760 MPa 110 x 103 psi
Tensile Strength: Yield (Proof)
650 MPa 94 x 103 psi
Thermal Properties
Latent Heat of Fusion
220 J/g
Maximum Temperature: Mechanical
200 °C 400 °F
Melting Completion (Liquidus)
1060 °C 1940 °F
Melting Onset (Solidus)
1040 °C 1910 °F
Specific Heat Capacity
390 J/kg-K 0.093 BTU/lb-°F
Thermal Conductivity
160 W/m-K 90 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
40 % IACS
Electrical Conductivity: Equal Weight (Specific)
40 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
2.7 kg CO2/kg material
Embodied Energy
43 MJ/kg 19 x 103 BTU/lb
Embodied Water
310 L/kg 37 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
68 MJ/m3
Resilience: Unit (Modulus of Resilience)
1810 kJ/m3
Stiffness to Weight: Axial
7.3 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
24 points
Strength to Weight: Bending
21 points
Thermal Diffusivity
45 mm2/s
Thermal Shock Resistance
27 points
Alloy Composition
| Cu | 95.8 to 98.8 | |
| Ni | 1.0 to 3.0 | |
| Si | 0.2 to 0.7 | |
| P | 0 to 0.010 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B422: Standard Specification for Copper-Aluminum-Silicon-Cobalt Alloy, Copper-Nickel-Silicon-Magnesium Alloy, Copper-Nickel-Silicon Alloy, Copper-Nickel-Aluminum-Magnesium Alloy, and Copper- Nickel-Tin Alloy Sheet and Strip
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015