UNS C61000 Aluminum Bronze
C61000 bronze is a bronze formulated for primary forming into wrought products. C61000 is the UNS number for this material. Additionally, the British Standard (BS) designation is CA102. It can have a moderately low tensile strength among the wrought bronzes in the database.
The properties of C61000 bronze include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare C61000 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
29 to 50 %
Poisson's Ratio
0.34
Rockwell B Hardness
60 to 85
Shear Modulus
42 GPa 6.1 x 106 psi
Shear Strength
280 to 300 MPa 40 to 44 x 103 psi
Tensile Strength: Ultimate (UTS)
390 to 460 MPa 57 to 67 x 103 psi
Tensile Strength: Yield (Proof)
150 to 190 MPa 22 to 28 x 103 psi
Thermal Properties
Latent Heat of Fusion
220 J/g
Maximum Temperature: Mechanical
210 °C 420 °F
Melting Completion (Liquidus)
1040 °C 1910 °F
Melting Onset (Solidus)
990 °C 1810 °F
Specific Heat Capacity
420 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
69 W/m-K 40 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
15 % IACS
Electrical Conductivity: Equal Weight (Specific)
16 % IACS
Otherwise Unclassified Properties
Base Metal Price
29 % relative
Density
8.5 g/cm3 530 lb/ft3
Embodied Carbon
3.0 kg CO2/kg material
Embodied Energy
49 MJ/kg 21 x 103 BTU/lb
Embodied Water
370 L/kg 44 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
110 to 160 MJ/m3
Resilience: Unit (Modulus of Resilience)
100 to 160 kJ/m3
Stiffness to Weight: Axial
7.4 points
Stiffness to Weight: Bending
19 points
Strength to Weight: Axial
13 to 15 points
Strength to Weight: Bending
14 to 16 points
Thermal Diffusivity
19 mm2/s
Thermal Shock Resistance
14 to 16 points
Alloy Composition
Among wrought copper alloys, the composition of C61000 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 | 90.2 to 94 | |
| Al | 6.0 to 8.5 | |
| Fe | 0 to 0.5 | |
| Zn | 0 to 0.2 | |
| Si | 0 to 0.1 | |
| Pb | 0 to 0.020 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.