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.
| Cu | 83 to 86.5 | |
| Al | 8.5 to 10.5 | |
| Fe | 1.5 to 3.5 | |
| Ni | 0 to 1.5 | |
| Mn | 0 to 1.0 | |
| Zn | 0 to 0.5 | |
| Si | 0 to 0.2 | |
| Sn | 0 to 0.2 | |
| Pb | 0 to 0.1 | |
| 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