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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

Copper (Cu) 93.8 to 96.1
Silicon (Si) 2.7 to 3.4
Tin (Sn) 1.2 to 1.9
Zinc (Zn) 0 to 0.5
Chromium (Cr) 0.010 to 0.12
Lead (Pb) 0 to 0.050
Residuals 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