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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.

Copper (Cu) 88.2 to 92.2
Aluminum (Al) 6.3 to 7.6
Silicon (Si) 1.5 to 2.2
Zinc (Zn) 0 to 0.5
Iron (Fe) 0 to 0.3
Nickel (Ni) 0 to 0.25
Tin (Sn) 0 to 0.2
Arsenic (As) 0 to 0.15
Manganese (Mn) 0 to 0.1
Lead (Pb) 0 to 0.050
Residuals 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