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Soft Annealed (O60) C32000 Brass

O60 C32000 brass is C32000 brass in the O60 (soft annealed) temper. It has the lowest strength and highest ductility compared to the other variants of C32000 brass. The graph bars on the material properties cards below compare O60 C32000 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

110 GPa 16 x 106 psi

Elongation at Break

29 %

Poisson's Ratio

0.33

Shear Modulus

41 GPa 6.0 x 106 psi

Shear Strength

180 MPa 26 x 103 psi

Tensile Strength: Ultimate (UTS)

270 MPa 40 x 103 psi

Tensile Strength: Yield (Proof)

78 MPa 11 x 103 psi

Thermal Properties

Latent Heat of Fusion

190 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

1020 °C 1880 °F

Melting Onset (Solidus)

990 °C 1820 °F

Specific Heat Capacity

380 J/kg-K 0.091 BTU/lb-°F

Thermal Conductivity

160 W/m-K 90 BTU/h-ft-°F

Thermal Expansion

19 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

36 % IACS

Electrical Conductivity: Equal Weight (Specific)

37 % IACS

Otherwise Unclassified Properties

Base Metal Price

28 % relative

Density

8.7 g/cm3 540 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

42 MJ/kg 18 x 103 BTU/lb

Embodied Water

310 L/kg 37 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

59 MJ/m3

Resilience: Unit (Modulus of Resilience)

28 kJ/m3

Stiffness to Weight: Axial

7.1 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

8.8 points

Strength to Weight: Bending

11 points

Thermal Diffusivity

47 mm2/s

Thermal Shock Resistance

9.5 points

Alloy Composition

Copper (Cu) 83.5 to 86.5
Zinc (Zn) 10.6 to 15
Lead (Pb) 1.5 to 2.2
Nickel (Ni) 0 to 0.25
Iron (Fe) 0 to 0.1
Residuals 0 to 0.4

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

Followup Questions

Further Reading

ASTM B140: Standard Specification for Copper-Zinc-Lead (Red Brass or Hardware Bronze) Rod, Bar, and Shapes

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