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Soft Annealed (O60) C47940 Brass

O60 C47940 brass is C47940 brass in the O60 (soft annealed) temper. It has the lowest strength compared to the other variants of C47940 brass. The graph bars on the material properties cards below compare O60 C47940 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

34 %

Poisson's Ratio

0.31

Shear Modulus

40 GPa 5.8 x 106 psi

Shear Strength

250 MPa 36 x 103 psi

Tensile Strength: Ultimate (UTS)

380 MPa 55 x 103 psi

Tensile Strength: Yield (Proof)

160 MPa 23 x 103 psi

Thermal Properties

Latent Heat of Fusion

170 J/g

Maximum Temperature: Mechanical

130 °C 260 °F

Melting Completion (Liquidus)

850 °C 1570 °F

Melting Onset (Solidus)

800 °C 1480 °F

Specific Heat Capacity

380 J/kg-K 0.091 BTU/lb-°F

Thermal Conductivity

110 W/m-K 64 BTU/h-ft-°F

Thermal Expansion

20 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

25 % relative

Density

8.2 g/cm3 510 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 40 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

100 MJ/m3

Resilience: Unit (Modulus of Resilience)

120 kJ/m3

Stiffness to Weight: Axial

7.1 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

13 points

Strength to Weight: Bending

14 points

Thermal Diffusivity

36 mm2/s

Thermal Shock Resistance

13 points

Alloy Composition

Copper (Cu)Cu 63 to 66
Zinc (Zn)Zn 28.1 to 34.6
Tin (Sn)Sn 1.2 to 2.0
Lead (Pb)Pb 1.0 to 2.0
Iron (Fe)Fe 0.1 to 1.0
Nickel (Ni)Ni 0.1 to 0.5
Residualsres. 0 to 0.4

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

Followup Questions

Further Reading

ASTM B21: Standard Specification for Naval Brass Rod, Bar, and Shapes

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