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Hot Forged and Annealed (O20) C63200 Bronze

O20 C63200 bronze is C63200 bronze in the O20 (hot forged and annealed) condition. It has the highest strength and lowest ductility compared to the other variants of C63200 bronze. The graph bars on the material properties cards below compare O20 C63200 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

120 GPa 17 x 106 psi

Elongation at Break

17 %

Poisson's Ratio

0.34

Shear Modulus

44 GPa 6.4 x 106 psi

Shear Strength

440 MPa 63 x 103 psi

Tensile Strength: Ultimate (UTS)

710 MPa 100 x 103 psi

Tensile Strength: Yield (Proof)

310 MPa 45 x 103 psi

Thermal Properties

Latent Heat of Fusion

230 J/g

Maximum Temperature: Mechanical

230 °C 450 °F

Melting Completion (Liquidus)

1060 °C 1940 °F

Melting Onset (Solidus)

1040 °C 1910 °F

Specific Heat Capacity

440 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

35 W/m-K 20 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

7.6 % IACS

Otherwise Unclassified Properties

Base Metal Price

29 % relative

Density

8.3 g/cm3 520 lb/ft3

Embodied Carbon

3.4 kg CO2/kg material

Embodied Energy

55 MJ/kg 24 x 103 BTU/lb

Embodied Water

380 L/kg 45 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

98 MJ/m3

Resilience: Unit (Modulus of Resilience)

400 kJ/m3

Stiffness to Weight: Axial

7.9 points

Stiffness to Weight: Bending

20 points

Strength to Weight: Axial

24 points

Strength to Weight: Bending

21 points

Thermal Diffusivity

9.6 mm2/s

Thermal Shock Resistance

24 points

Alloy Composition

Copper (Cu)Cu 78.8 to 82.6
Aluminum (Al)Al 8.7 to 9.5
Nickel (Ni)Ni 4.0 to 4.8
Iron (Fe)Fe 3.5 to 4.3
Manganese (Mn)Mn 1.2 to 2.0
Silicon (Si)Si 0 to 0.1
Lead (Pb)Pb 0 to 0.020
Residualsres. 0 to 0.5

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

Followup Questions

Further Reading

ASTM B150: Standard Specification for Aluminum 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)

Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001

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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015