Fully Cold-Worked and Aged (HT or TH04) C17500 Copper
TH04 C17500 copper is C17500 copper in the TH04 (full-hard and precipitation heat treated) temper. It has the highest strength compared to the other variants of C17500 copper. The graph bars on the material properties cards below compare TH04 C17500 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
13 %
Fatigue Strength
310 MPa 45 x 103 psi
Poisson's Ratio
0.34
Rockwell B Hardness
99
Shear Modulus
45 GPa 6.5 x 106 psi
Shear Strength
520 MPa 75 x 103 psi
Tensile Strength: Ultimate (UTS)
860 MPa 120 x 103 psi
Tensile Strength: Yield (Proof)
760 MPa 110 x 103 psi
Thermal Properties
Latent Heat of Fusion
220 J/g
Maximum Temperature: Mechanical
220 °C 430 °F
Melting Completion (Liquidus)
1060 °C 1940 °F
Melting Onset (Solidus)
1020 °C 1870 °F
Specific Heat Capacity
390 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
200 W/m-K 120 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
53 % IACS
Electrical Conductivity: Equal Weight (Specific)
54 % IACS
Otherwise Unclassified Properties
Base Metal Price
60 % relative
Density
8.9 g/cm3 550 lb/ft3
Embodied Carbon
4.7 kg CO2/kg material
Embodied Energy
73 MJ/kg 31 x 103 BTU/lb
Embodied Water
320 L/kg 38 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
100 MJ/m3
Resilience: Unit (Modulus of Resilience)
2390 kJ/m3
Stiffness to Weight: Axial
7.5 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
27 points
Strength to Weight: Bending
23 points
Thermal Diffusivity
59 mm2/s
Thermal Shock Resistance
29 points
Alloy Composition
| Cu | 95.6 to 97.2 | |
| Co | 2.4 to 2.7 | |
| Be | 0.4 to 0.7 | |
| Si | 0 to 0.2 | |
| Al | 0 to 0.2 | |
| Fe | 0 to 0.1 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B441: Standard Specification for Copper-Cobalt-Beryllium, Copper-Nickel-Beryllium, and Copper-Nickel-Lead-Beryllium Rod and Bar (UNS Nos. C17500, C17510, and C17465)
Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993