UNS C61800 (CW305G) Aluminum Bronze
C61800 bronze is a bronze formulated for primary forming into wrought products. Cited properties are appropriate for the H02 (half hard) temper. CW305G is the EN numeric designation for this material. C61800 is the UNS number. Additionally, the EN chemical designation is CuAl10Fe1. And the British Standard (BS) designation is CA103.
It has a moderately high heat capacity among wrought bronzes. In addition, it has a moderately high melting temperature and a fairly high tensile strength.
The graph bars on the material properties cards below compare C61800 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
26 %
Fatigue Strength
190 MPa 27 x 103 psi
Poisson's Ratio
0.34
Rockwell B Hardness
89
Shear Modulus
44 GPa 6.4 x 106 psi
Shear Strength
310 MPa 45 x 103 psi
Tensile Strength: Ultimate (UTS)
740 MPa 110 x 103 psi
Tensile Strength: Yield (Proof)
310 MPa 45 x 103 psi
Thermal Properties
Latent Heat of Fusion
230 J/g
Maximum Temperature: Mechanical
220 °C 430 °F
Melting Completion (Liquidus)
1050 °C 1910 °F
Melting Onset (Solidus)
1040 °C 1900 °F
Specific Heat Capacity
440 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
64 W/m-K 37 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
3.1 kg CO2/kg material
Embodied Energy
52 MJ/kg 22 x 103 BTU/lb
Embodied Water
390 L/kg 47 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
150 MJ/m3
Resilience: Unit (Modulus of Resilience)
420 kJ/m3
Stiffness to Weight: Axial
7.5 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
25 points
Strength to Weight: Bending
22 points
Thermal Diffusivity
18 mm2/s
Thermal Shock Resistance
26 points
Alloy Composition
Among wrought copper alloys, the composition of C61800 bronze is notable for including aluminum (Al) and silicon (Si). Aluminum is used to add strength and oxidation resistance. Silicon is used to increase strength at the expense of ductility. It also lowers the melting temperature and raises the fluidity of the alloy.
| Cu | 86.9 to 91 | |
| Al | 8.5 to 11 | |
| Fe | 0.5 to 1.5 | |
| Si | 0 to 0.1 | |
| Pb | 0 to 0.020 | |
| Zn | 0 to 0.020 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.