Soft Annealed (O60) C66100 Bronze
O60 C66100 bronze is C66100 bronze in the O60 (soft annealed) temper. It has the lowest strength and highest ductility compared to the other variants of C66100 bronze. The graph bars on the material properties cards below compare O60 C66100 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
40 %
Poisson's Ratio
0.34
Shear Modulus
43 GPa 6.2 x 106 psi
Shear Strength
280 MPa 41 x 103 psi
Tensile Strength: Ultimate (UTS)
410 MPa 60 x 103 psi
Tensile Strength: Yield (Proof)
120 MPa 17 x 103 psi
Thermal Properties
Latent Heat of Fusion
260 J/g
Maximum Temperature: Mechanical
200 °C 390 °F
Melting Completion (Liquidus)
1050 °C 1930 °F
Melting Onset (Solidus)
1000 °C 1830 °F
Specific Heat Capacity
400 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
34 W/m-K 19 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
29 % 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
300 L/kg 36 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
120 MJ/m3
Resilience: Unit (Modulus of Resilience)
60 kJ/m3
Stiffness to Weight: Axial
7.4 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
13 points
Strength to Weight: Bending
14 points
Thermal Diffusivity
9.7 mm2/s
Thermal Shock Resistance
15 points
Alloy Composition
| Cu | 92 to 97 | |
| Si | 2.8 to 3.5 | |
| Mn | 0 to 1.5 | |
| Zn | 0 to 1.5 | |
| Pb | 0.2 to 0.8 | |
| Fe | 0 to 0.25 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B98: Standard Specification for Copper-Silicon Alloy Rod, Bar and Shapes
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001