UNS C64200 (CW301G) Aluminum-Silicon Bronze
C64200 bronze is a bronze formulated for primary forming into wrought products. CW301G is the EN numeric designation for this material. C64200 is the UNS number. Additionally, the British Standard (BS) designation is CA107.
It has a moderately low electrical conductivity and a moderately low thermal conductivity among wrought bronzes.
The properties of C64200 bronze include five common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 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
14 to 35 %
Poisson's Ratio
0.34
Shear Modulus
42 GPa 6.1 x 106 psi
Shear Strength
330 to 390 MPa 48 to 56 x 103 psi
Tensile Strength: Ultimate (UTS)
540 to 640 MPa 79 to 93 x 103 psi
Tensile Strength: Yield (Proof)
230 to 320 MPa 33 to 47 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)
73 to 170 MJ/m3
Resilience: Unit (Modulus of Resilience)
240 to 470 kJ/m3
Stiffness to Weight: Axial
7.5 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
18 to 21 points
Strength to Weight: Bending
18 to 20 points
Thermal Diffusivity
13 mm2/s
Thermal Shock Resistance
20 to 23 points
Alloy Composition
Among wrought copper alloys, the composition of C64200 bronze is notable for including arsenic (As) and aluminum (Al). Arsenic is used to protect the alloy against dezincification. Aluminum is used to add strength and oxidation resistance.
| 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
Similar Alloys
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