Hot Forged and Annealed (O20) C62400 Bronze
O20 C62400 bronze is C62400 bronze in the O20 (hot forged and annealed) condition. The graph bars on the material properties cards below compare O20 C62400 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
14 %
Poisson's Ratio
0.34
Shear Modulus
42 GPa 6.1 x 106 psi
Shear Strength
430 MPa 62 x 103 psi
Tensile Strength: Ultimate (UTS)
710 MPa 100 x 103 psi
Tensile Strength: Yield (Proof)
270 MPa 39 x 103 psi
Thermal Properties
Latent Heat of Fusion
230 J/g
Maximum Temperature: Mechanical
220 °C 430 °F
Melting Completion (Liquidus)
1040 °C 1900 °F
Melting Onset (Solidus)
1030 °C 1880 °F
Specific Heat Capacity
440 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
59 W/m-K 34 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
27 % relative
Density
8.2 g/cm3 510 lb/ft3
Embodied Carbon
3.2 kg CO2/kg material
Embodied Energy
53 MJ/kg 23 x 103 BTU/lb
Embodied Water
400 L/kg 47 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
77 MJ/m3
Resilience: Unit (Modulus of Resilience)
320 kJ/m3
Stiffness to Weight: Axial
7.6 points
Stiffness to Weight: Bending
20 points
Strength to Weight: Axial
24 points
Strength to Weight: Bending
21 points
Thermal Diffusivity
16 mm2/s
Thermal Shock Resistance
25 points
Alloy Composition
| Cu | 82.8 to 88 | |
| Al | 10 to 11.5 | |
| Fe | 2.0 to 4.5 | |
| Mn | 0 to 0.3 | |
| Si | 0 to 0.25 | |
| Sn | 0 to 0.2 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B150: Standard Specification for Aluminum Bronze Rod, Bar, and Shapes
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001