Spring-Tempered (H08) C40500 Penny Bronze
H08 C40500 penny bronze is C40500 penny bronze in the H08 (spring) temper. It has the second highest strength and second lowest ductility compared to the other variants of C40500 penny bronze. The graph bars on the material properties cards below compare H08 C40500 penny bronze to: wrought bronzes (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
110 GPa 17 x 106 psi
Elongation at Break
4.0 %
Poisson's Ratio
0.34
Rockwell B Hardness
79
Rockwell Superficial 30T Hardness
71
Shear Modulus
43 GPa 6.2 x 106 psi
Shear Strength
300 MPa 43 x 103 psi
Tensile Strength: Ultimate (UTS)
510 MPa 74 x 103 psi
Tensile Strength: Yield (Proof)
480 MPa 70 x 103 psi
Thermal Properties
Latent Heat of Fusion
200 J/g
Maximum Temperature: Mechanical
190 °C 370 °F
Melting Completion (Liquidus)
1060 °C 1940 °F
Melting Onset (Solidus)
1020 °C 1880 °F
Specific Heat Capacity
380 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
160 W/m-K 95 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
41 % IACS
Electrical Conductivity: Equal Weight (Specific)
42 % IACS
Otherwise Unclassified Properties
Base Metal Price
30 % relative
Density
8.8 g/cm3 550 lb/ft3
Embodied Carbon
2.7 kg CO2/kg material
Embodied Energy
43 MJ/kg 19 x 103 BTU/lb
Embodied Water
320 L/kg 38 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
20 MJ/m3
Resilience: Unit (Modulus of Resilience)
1030 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
48 mm2/s
Thermal Shock Resistance
18 points
Alloy Composition
| Cu | 94 to 96 | |
| Zn | 2.1 to 5.3 | |
| Sn | 0.7 to 1.3 | |
| Fe | 0 to 0.050 | |
| 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
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993