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Annealed (O61) C65100 Bronze

O61 C65100 bronze is C65100 bronze in the O61 (annealed) temper. It has the second lowest strength and second highest ductility compared to the other variants of C65100 bronze. The graph bars on the material properties cards below compare O61 C65100 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

47 %

Poisson's Ratio

0.34

Rockwell F Hardness

50

Shear Modulus

43 GPa 6.3 x 106 psi

Shear Strength

200 MPa 29 x 103 psi

Tensile Strength: Ultimate (UTS)

290 MPa 41 x 103 psi

Tensile Strength: Yield (Proof)

97 MPa 14 x 103 psi

Thermal Properties

Latent Heat of Fusion

230 J/g

Maximum Temperature: Mechanical

200 °C 390 °F

Melting Completion (Liquidus)

1060 °C 1940 °F

Melting Onset (Solidus)

1030 °C 1890 °F

Specific Heat Capacity

390 J/kg-K 0.094 BTU/lb-°F

Thermal Conductivity

57 W/m-K 33 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

12 % IACS

Electrical Conductivity: Equal Weight (Specific)

12 % IACS

Otherwise Unclassified Properties

Base Metal Price

30 % relative

Calomel Potential

-280 mV

Density

8.8 g/cm3 550 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

41 MJ/kg 18 x 103 BTU/lb

Embodied Water

300 L/kg 36 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

100 MJ/m3

Resilience: Unit (Modulus of Resilience)

40 kJ/m3

Stiffness to Weight: Axial

7.3 points

Stiffness to Weight: Bending

18 points

Strength to Weight: Axial

9.0 points

Strength to Weight: Bending

11 points

Thermal Diffusivity

16 mm2/s

Thermal Shock Resistance

9.8 points

Alloy Composition

Copper (Cu) 94.5 to 99.2
Silicon (Si) 0.8 to 2.0
Zinc (Zn) 0 to 1.5
Iron (Fe) 0 to 0.8
Manganese (Mn) 0 to 0.7
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

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