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Soft Annealed (O60) C34500 Brass

O60 C34500 brass is C34500 brass in the O60 (soft annealed) temper. It has the lowest strength and highest ductility compared to the other variants of C34500 brass. The graph bars on the material properties cards below compare O60 C34500 brass 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

100 GPa 15 x 106 psi

Elongation at Break

28 %

Poisson's Ratio

0.31

Shear Modulus

40 GPa 5.7 x 106 psi

Shear Strength

220 MPa 32 x 103 psi

Tensile Strength: Ultimate (UTS)

340 MPa 49 x 103 psi

Tensile Strength: Yield (Proof)

120 MPa 17 x 103 psi

Thermal Properties

Latent Heat of Fusion

170 J/g

Maximum Temperature: Mechanical

120 °C 250 °F

Melting Completion (Liquidus)

910 °C 1670 °F

Melting Onset (Solidus)

890 °C 1630 °F

Specific Heat Capacity

380 J/kg-K 0.091 BTU/lb-°F

Thermal Conductivity

120 W/m-K 67 BTU/h-ft-°F

Thermal Expansion

21 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

26 % IACS

Electrical Conductivity: Equal Weight (Specific)

29 % IACS

Otherwise Unclassified Properties

Base Metal Price

24 % relative

Density

8.2 g/cm3 510 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

45 MJ/kg 19 x 103 BTU/lb

Embodied Water

320 L/kg 38 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

75 MJ/m3

Resilience: Unit (Modulus of Resilience)

69 kJ/m3

Stiffness to Weight: Axial

7.1 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

12 points

Strength to Weight: Bending

13 points

Thermal Diffusivity

37 mm2/s

Thermal Shock Resistance

11 points

Alloy Composition

Copper (Cu)Cu 62 to 65
Zinc (Zn)Zn 32 to 36.5
Lead (Pb)Pb 1.5 to 2.5
Iron (Fe)Fe 0 to 0.15
Residualsres. 0 to 0.4

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

Followup Questions

Further Reading

ASTM B453: Standard Specification for Copper-Zinc-Lead Alloy (Leaded-Brass) Rod, Bar, and Shapes

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