Soft Annealed (O60) C61500 Bronze
O60 C61500 bronze is C61500 bronze in the O60 (soft annealed) temper. It has the lowest strength and highest ductility compared to the other variants of C61500 bronze. The graph bars on the material properties cards below compare O60 C61500 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 16 x 106 psi
Elongation at Break
55 %
Poisson's Ratio
0.34
Rockwell Superficial 30T Hardness
42
Shear Modulus
42 GPa 6.1 x 106 psi
Shear Strength
350 MPa 51 x 103 psi
Tensile Strength: Ultimate (UTS)
480 MPa 70 x 103 psi
Tensile Strength: Yield (Proof)
150 MPa 22 x 103 psi
Thermal Properties
Latent Heat of Fusion
220 J/g
Maximum Temperature: Mechanical
220 °C 420 °F
Melting Completion (Liquidus)
1040 °C 1900 °F
Melting Onset (Solidus)
1030 °C 1890 °F
Specific Heat Capacity
430 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
58 W/m-K 34 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
13 % IACS
Electrical Conductivity: Equal Weight (Specific)
13 % IACS
Otherwise Unclassified Properties
Base Metal Price
29 % relative
Density
8.4 g/cm3 530 lb/ft3
Embodied Carbon
3.2 kg CO2/kg material
Embodied Energy
52 MJ/kg 22 x 103 BTU/lb
Embodied Water
380 L/kg 45 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
200 MJ/m3
Resilience: Unit (Modulus of Resilience)
100 kJ/m3
Stiffness to Weight: Axial
7.5 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
16 points
Strength to Weight: Bending
16 points
Thermal Diffusivity
16 mm2/s
Thermal Shock Resistance
17 points
Alloy Composition
| Cu | 89 to 90.5 | |
| Al | 7.7 to 8.3 | |
| Ni | 1.8 to 2.2 | |
| Pb | 0 to 0.015 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015