Soft Annealed (O60) C61300 Bronze
O60 C61300 bronze is C61300 bronze in the O60 (soft annealed) temper. It has the highest ductility compared to the other variants of C61300 bronze. The graph bars on the material properties cards below compare O60 C61300 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
110 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
380 MPa 55 x 103 psi
Tensile Strength: Ultimate (UTS)
550 MPa 80 x 103 psi
Tensile Strength: Yield (Proof)
230 MPa 34 x 103 psi
Thermal Properties
Latent Heat of Fusion
220 J/g
Maximum Temperature: Mechanical
210 °C 420 °F
Melting Completion (Liquidus)
1050 °C 1910 °F
Melting Onset (Solidus)
1040 °C 1910 °F
Specific Heat Capacity
420 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
55 W/m-K 32 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
12 % IACS
Electrical Conductivity: Equal Weight (Specific)
13 % IACS
Otherwise Unclassified Properties
Base Metal Price
29 % relative
Density
8.5 g/cm3 530 lb/ft3
Embodied Carbon
3.0 kg CO2/kg material
Embodied Energy
49 MJ/kg 21 x 103 BTU/lb
Embodied Water
370 L/kg 44 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
180 MJ/m3
Resilience: Unit (Modulus of Resilience)
240 kJ/m3
Stiffness to Weight: Axial
7.5 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
18 points
Strength to Weight: Bending
18 points
Thermal Diffusivity
15 mm2/s
Thermal Shock Resistance
19 points
Alloy Composition
| Cu | 88 to 91.8 | |
| Al | 6.0 to 7.5 | |
| Fe | 2.0 to 3.0 | |
| Sn | 0.2 to 0.5 | |
| Mn | 0 to 0.2 | |
| Zn | 0 to 0.2 | |
| Ni | 0 to 0.15 | |
| Si | 0 to 0.1 | |
| P | 0 to 0.015 | |
| Pb | 0 to 0.010 | |
| res. | 0 to 0.2 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B169: Standard Specification for Aluminum Bronze Sheet, Strip, and Rolled Bar
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