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Half-Hard (H02) C67500 Bronze

H02 C67500 bronze is C67500 bronze in the H02 (half hard) temper. It has the second lowest ductility compared to the other variants of C67500 bronze. The graph bars on the material properties cards below compare H02 C67500 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

100 GPa 15 x 106 psi

Elongation at Break

15 %

Poisson's Ratio

0.3

Shear Modulus

40 GPa 5.8 x 106 psi

Shear Strength

310 MPa 44 x 103 psi

Tensile Strength: Ultimate (UTS)

500 MPa 73 x 103 psi

Tensile Strength: Yield (Proof)

250 MPa 36 x 103 psi

Thermal Properties

Latent Heat of Fusion

170 J/g

Maximum Temperature: Mechanical

120 °C 250 °F

Melting Completion (Liquidus)

890 °C 1630 °F

Melting Onset (Solidus)

870 °C 1590 °F

Specific Heat Capacity

390 J/kg-K 0.092 BTU/lb-°F

Thermal Conductivity

110 W/m-K 61 BTU/h-ft-°F

Thermal Expansion

21 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

24 % IACS

Electrical Conductivity: Equal Weight (Specific)

27 % IACS

Otherwise Unclassified Properties

Base Metal Price

23 % relative

Density

8.0 g/cm3 500 lb/ft3

Embodied Carbon

2.8 kg CO2/kg material

Embodied Energy

47 MJ/kg 20 x 103 BTU/lb

Embodied Water

330 L/kg 39 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

61 MJ/m3

Resilience: Unit (Modulus of Resilience)

300 kJ/m3

Stiffness to Weight: Axial

7.3 points

Stiffness to Weight: Bending

20 points

Strength to Weight: Axial

18 points

Strength to Weight: Bending

18 points

Thermal Diffusivity

34 mm2/s

Thermal Shock Resistance

17 points

Alloy Composition

Copper (Cu)Cu 57 to 60
Zinc (Zn)Zn 35.1 to 41.7
Iron (Fe)Fe 0.8 to 2.0
Tin (Sn)Sn 0.5 to 1.5
Manganese (Mn)Mn 0.050 to 0.5
Aluminum (Al)Al 0 to 0.25
Lead (Pb)Pb 0 to 0.2
Residualsres. 0 to 0.5

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

ASTM B138: Standard Specification for Manganese Bronze Rod, Bar, and Shapes

ASTM B124: Standard Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes

ASTM B283: Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed)

ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001