3/4-Hard (H03) C65400 Bronze
H03 C65400 bronze is C65400 bronze in the H03 (3/4 hard) temper. The graph bars on the material properties cards below compare H03 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
11 %
Poisson's Ratio
0.34
Rockwell B Hardness
96
Rockwell Superficial 30T Hardness
79
Shear Modulus
43 GPa 6.2 x 106 psi
Shear Strength
430 MPa 63 x 103 psi
Tensile Strength: Ultimate (UTS)
720 MPa 100 x 103 psi
Tensile Strength: Yield (Proof)
680 MPa 98 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)
79 MJ/m3
Resilience: Unit (Modulus of Resilience)
2020 kJ/m3
Stiffness to Weight: Axial
7.3 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
23 points
Strength to Weight: Bending
21 points
Thermal Diffusivity
10 mm2/s
Thermal Shock Resistance
26 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