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Half-Hard and Stress Relieved (HR02) C67400 Bronze

HR02 C67400 bronze is C67400 bronze in the HR02 (half-hard and stress relieved) temper. It has the highest strength and lowest ductility compared to the other variants of C67400 bronze. The graph bars on the material properties cards below compare HR02 C67400 bronze to: wrought brasses (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 15 x 106 psi

Elongation at Break

22 %

Fatigue Strength

200 MPa 29 x 103 psi

Poisson's Ratio

0.31

Rockwell B Hardness

85

Shear Modulus

41 GPa 5.9 x 106 psi

Shear Strength

330 MPa 48 x 103 psi

Tensile Strength: Ultimate (UTS)

610 MPa 89 x 103 psi

Tensile Strength: Yield (Proof)

370 MPa 54 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

130 °C 260 °F

Melting Completion (Liquidus)

890 °C 1630 °F

Melting Onset (Solidus)

870 °C 1590 °F

Specific Heat Capacity

400 J/kg-K 0.1 BTU/lb-°F

Thermal Conductivity

100 W/m-K 58 BTU/h-ft-°F

Thermal Expansion

21 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

23 % IACS

Electrical Conductivity: Equal Weight (Specific)

26 % IACS

Otherwise Unclassified Properties

Base Metal Price

23 % relative

Density

7.9 g/cm3 490 lb/ft3

Embodied Carbon

2.8 kg CO2/kg material

Embodied Energy

48 MJ/kg 21 x 103 BTU/lb

Embodied Water

330 L/kg 39 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

120 MJ/m3

Resilience: Unit (Modulus of Resilience)

660 kJ/m3

Stiffness to Weight: Axial

7.5 points

Stiffness to Weight: Bending

20 points

Strength to Weight: Axial

22 points

Strength to Weight: Bending

20 points

Thermal Diffusivity

32 mm2/s

Thermal Shock Resistance

20 points

Alloy Composition

Copper (Cu)Cu 57 to 60
Zinc (Zn)Zn 31.1 to 40
Manganese (Mn)Mn 2.0 to 3.5
Aluminum (Al)Al 0.5 to 2.0
Silicon (Si)Si 0.5 to 1.5
Lead (Pb)Pb 0 to 0.5
Iron (Fe)Fe 0 to 0.35
Tin (Sn)Sn 0 to 0.3
Nickel (Ni)Ni 0 to 0.25
Residualsres. 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