As Hot Rolled (M20) C64200 Bronze
M20 C64200 bronze is C64200 bronze in the M20 (as hot rolled) condition. It has the lowest strength compared to the other variants of C64200 bronze. The graph bars on the material properties cards below compare M20 C64200 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
17 %
Poisson's Ratio
0.34
Shear Modulus
42 GPa 6.1 x 106 psi
Shear Strength
330 MPa 48 x 103 psi
Tensile Strength: Ultimate (UTS)
540 MPa 79 x 103 psi
Tensile Strength: Yield (Proof)
230 MPa 34 x 103 psi
Thermal Properties
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
210 °C 410 °F
Melting Completion (Liquidus)
1000 °C 1840 °F
Melting Onset (Solidus)
980 °C 1800 °F
Specific Heat Capacity
430 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
45 W/m-K 26 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
8.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.6 % IACS
Otherwise Unclassified Properties
Base Metal Price
29 % relative
Density
8.3 g/cm3 520 lb/ft3
Embodied Carbon
3.0 kg CO2/kg material
Embodied Energy
50 MJ/kg 21 x 103 BTU/lb
Embodied Water
370 L/kg 44 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
74 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
13 mm2/s
Thermal Shock Resistance
20 points
Alloy Composition
| Cu | 88.2 to 92.2 | |
| Al | 6.3 to 7.6 | |
| Si | 1.5 to 2.2 | |
| Zn | 0 to 0.5 | |
| Fe | 0 to 0.3 | |
| Ni | 0 to 0.25 | |
| Sn | 0 to 0.2 | |
| As | 0 to 0.15 | |
| Mn | 0 to 0.1 | |
| Pb | 0 to 0.050 | |
| 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
ASTM B124: Standard Specification for Copper and Copper Alloy Forging Rod, Bar, and Shapes
ASTM B283: Standard Specification for Copper and Copper-Alloy Die Forgings (Hot-Pressed)
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001