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As Hot Rolled (M20) C65500 Bronze

M20 C65500 bronze is C65500 bronze in the M20 (as hot rolled) condition. The graph bars on the material properties cards below compare M20 C65500 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

Poisson's Ratio

0.34

Rockwell F Hardness

82

Shear Modulus

43 GPa 6.3 x 106 psi

Tensile Strength: Ultimate (UTS)

440 MPa 64 x 103 psi

Thermal Properties

Latent Heat of Fusion

260 J/g

Maximum Temperature: Mechanical

200 °C 390 °F

Melting Completion (Liquidus)

1030 °C 1880 °F

Melting Onset (Solidus)

970 °C 1780 °F

Specific Heat Capacity

400 J/kg-K 0.1 BTU/lb-°F

Thermal Conductivity

36 W/m-K 21 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

7.3 % IACS

Otherwise Unclassified Properties

Base Metal Price

29 % relative

Calomel Potential

-270 mV

Density

8.6 g/cm3 540 lb/ft3

Embodied Carbon

2.7 kg CO2/kg material

Embodied Energy

42 MJ/kg 18 x 103 BTU/lb

Embodied Water

300 L/kg 36 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

11 to 450 MJ/m3

Resilience: Unit (Modulus of Resilience)

62 to 790 kJ/m3

Stiffness to Weight: Axial

7.5 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

14 points

Strength to Weight: Bending

15 points

Thermal Diffusivity

10 mm2/s

Thermal Shock Resistance

15 points

Alloy Composition

Copper (Cu) 91.5 to 96.7
Silicon (Si) 2.8 to 3.8
Manganese (Mn) 0.5 to 1.3
Zinc (Zn) 0 to 1.5
Iron (Fe) 0 to 0.8
Nickel (Ni) 0 to 0.6
Lead (Pb) 0 to 0.050
Residuals 0 to 0.5

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

Followup Questions

Further Reading

ASTM B96: Standard Specification for Copper-Silicon Alloy Plate, Sheet, Strip, and Rolled Bar for General Purposes and Pressure Vessels

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

Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993