Spring-Tempered (H08) C65400 Bronze
H08 C65400 bronze is C65400 bronze in the H08 (spring) temper. It has the second lowest ductility compared to the other variants of C65400 bronze. The graph bars on the material properties cards below compare H08 C65400 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
4.1 %
Poisson's Ratio
0.34
Rockwell B Hardness
100
Rockwell Superficial 30T Hardness
82
Shear Modulus
43 GPa 6.2 x 106 psi
Shear Strength
510 MPa 74 x 103 psi
Tensile Strength: Ultimate (UTS)
890 MPa 130 x 103 psi
Tensile Strength: Yield (Proof)
620 MPa 90 x 103 psi
Thermal Properties
Latent Heat of Fusion
260 J/g
Maximum Temperature: Mechanical
200 °C 380 °F
Melting Completion (Liquidus)
1020 °C 1860 °F
Melting Onset (Solidus)
960 °C 1750 °F
Specific Heat Capacity
400 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
36 W/m-K 21 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
7.3 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
8.7 g/cm3 540 lb/ft3
Embodied Carbon
2.8 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)
32 MJ/m3
Resilience: Unit (Modulus of Resilience)
1670 kJ/m3
Stiffness to Weight: Axial
7.3 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
28 points
Strength to Weight: Bending
24 points
Thermal Diffusivity
10 mm2/s
Thermal Shock Resistance
32 points
Alloy Composition
| Cu | 93.8 to 96.1 | |
| Si | 2.7 to 3.4 | |
| Sn | 1.2 to 1.9 | |
| Zn | 0 to 0.5 | |
| Cr | 0.010 to 0.12 | |
| Pb | 0 to 0.050 | |
| res. | 0 to 0.2 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B96: Standard Specification for Copper-Silicon Alloy Plate, Sheet, Strip, and Rolled Bar for General Purposes and Pressure Vessels
Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011
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