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EN CC331G (CuAI10Fe2-C) Aluminum Bronze

CC331G bronze is a bronze formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. CC331G is the EN numeric designation for this material. CuAI10Fe2-C is the EN chemical designation.

It has a fairly high heat capacity among cast bronzes. In addition, it has a moderately low base cost and a moderately high electrical conductivity.

The graph bars on the material properties cards below compare CC331G bronze to: cast 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

Brinell Hardness

140

Elastic (Young's, Tensile) Modulus

110 GPa 17 x 106 psi

Elongation at Break

20 %

Poisson's Ratio

0.34

Shear Modulus

43 GPa 6.2 x 106 psi

Tensile Strength: Ultimate (UTS)

620 MPa 89 x 103 psi

Tensile Strength: Yield (Proof)

240 MPa 34 x 103 psi

Thermal Properties

Latent Heat of Fusion

230 J/g

Maximum Temperature: Mechanical

220 °C 430 °F

Melting Completion (Liquidus)

1060 °C 1940 °F

Melting Onset (Solidus)

1000 °C 1840 °F

Specific Heat Capacity

440 J/kg-K 0.1 BTU/lb-°F

Thermal Conductivity

61 W/m-K 35 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

13 % IACS

Electrical Conductivity: Equal Weight (Specific)

14 % IACS

Otherwise Unclassified Properties

Base Metal Price

28 % relative

Density

8.3 g/cm3 520 lb/ft3

Embodied Carbon

3.2 kg CO2/kg material

Embodied Energy

53 MJ/kg 23 x 103 BTU/lb

Embodied Water

390 L/kg 46 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

97 MJ/m3

Resilience: Unit (Modulus of Resilience)

250 kJ/m3

Stiffness to Weight: Axial

7.6 points

Stiffness to Weight: Bending

19 points

Strength to Weight: Axial

21 points

Strength to Weight: Bending

19 points

Thermal Diffusivity

17 mm2/s

Thermal Shock Resistance

22 points

Alloy Composition

Among cast copper alloys, the composition of CC331G bronze is notable for containing comparatively high amounts of iron (Fe) and aluminum (Al). Iron is used to increase strength inexpensively. Aluminum is used to add strength and oxidation resistance, at the cost of requiring additional care during casting.

Copper (Cu) 83 to 86.5
Aluminum (Al) 8.5 to 10.5
Iron (Fe) 1.5 to 3.5
Nickel (Ni) 0 to 1.5
Manganese (Mn) 0 to 1.0
Zinc (Zn) 0 to 0.5
Silicon (Si) 0 to 0.2
Tin (Sn) 0 to 0.2
Lead (Pb) 0 to 0.1
Magnesium (Mg) 0 to 0.050

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

EN 1982: Copper and copper alloys - Ingots and castings