Annealed (O61) C61300 Bronze
O61 C61300 bronze is C61300 bronze in the O61 (annealed) temper. The graph bars on the material properties cards below compare O61 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
Poisson's Ratio
0.34
Shear Modulus
43 GPa 6.2 x 106 psi
Tensile Strength: Ultimate (UTS)
550 MPa 79 x 103 psi
Tensile Strength: Yield (Proof)
230 MPa 33 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)
150 to 190 MJ/m3
Resilience: Unit (Modulus of Resilience)
230 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 B111: Standard Specification for Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock
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