TM00 Mill Hardened C70250 Copper
TM00 C70250 copper is C70250 copper in the TM00 (mill annealed) temper. It has the second lowest strength compared to the other variants of C70250 copper. The graph bars on the material properties cards below compare TM00 C70250 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
19 %
Poisson's Ratio
0.34
Shear Modulus
44 GPa 6.4 x 106 psi
Shear Strength
330 MPa 48 x 103 psi
Tensile Strength: Ultimate (UTS)
540 MPa 78 x 103 psi
Tensile Strength: Yield (Proof)
420 MPa 61 x 103 psi
Thermal Properties
Latent Heat of Fusion
220 J/g
Maximum Temperature: Mechanical
210 °C 400 °F
Melting Completion (Liquidus)
1100 °C 2000 °F
Melting Onset (Solidus)
1080 °C 1970 °F
Specific Heat Capacity
390 J/kg-K 0.094 BTU/lb-°F
Thermal Conductivity
170 W/m-K 98 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
40 % IACS
Electrical Conductivity: Equal Weight (Specific)
41 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
8.9 g/cm3 550 lb/ft3
Embodied Carbon
2.9 kg CO2/kg material
Embodied Energy
45 MJ/kg 19 x 103 BTU/lb
Embodied Water
310 L/kg 37 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
95 MJ/m3
Resilience: Unit (Modulus of Resilience)
750 kJ/m3
Stiffness to Weight: Axial
7.4 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
17 points
Thermal Diffusivity
49 mm2/s
Thermal Shock Resistance
19 points
Alloy Composition
| Cu | 92.7 to 97.5 | |
| Ni | 2.2 to 4.2 | |
| Si | 0.25 to 1.2 | |
| Zn | 0 to 1.0 | |
| Mg | 0.050 to 0.3 | |
| Mn | 0 to 0.1 | |
| Pb | 0 to 0.050 | |
| 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