Annealed (OS050) C51000 Bronze
OS050 C51000 bronze is C51000 bronze in the OS050 (annealed to 0.050mm grain size) temper. It has the lowest strength and highest ductility compared to the other variants of C51000 bronze. The graph bars on the material properties cards below compare OS050 C51000 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
64 %
Poisson's Ratio
0.34
Rockwell B Hardness
26
Shear Modulus
42 GPa 6.1 x 106 psi
Shear Strength
250 MPa 36 x 103 psi
Tensile Strength: Ultimate (UTS)
330 MPa 47 x 103 psi
Tensile Strength: Yield (Proof)
130 MPa 19 x 103 psi
Thermal Properties
Latent Heat of Fusion
200 J/g
Maximum Temperature: Mechanical
190 °C 370 °F
Melting Completion (Liquidus)
1050 °C 1930 °F
Melting Onset (Solidus)
960 °C 1770 °F
Specific Heat Capacity
380 J/kg-K 0.090 BTU/lb-°F
Thermal Conductivity
77 W/m-K 44 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
18 % IACS
Electrical Conductivity: Equal Weight (Specific)
18 % IACS
Otherwise Unclassified Properties
Base Metal Price
33 % relative
Density
8.8 g/cm3 550 lb/ft3
Embodied Carbon
3.1 kg CO2/kg material
Embodied Energy
50 MJ/kg 21 x 103 BTU/lb
Embodied Water
350 L/kg 42 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
170 MJ/m3
Resilience: Unit (Modulus of Resilience)
75 kJ/m3
Stiffness to Weight: Axial
7.0 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
10 points
Strength to Weight: Bending
12 points
Thermal Diffusivity
23 mm2/s
Thermal Shock Resistance
12 points
Alloy Composition
| Cu | 92.9 to 95.5 | |
| Sn | 4.5 to 5.8 | |
| P | 0.030 to 0.35 | |
| Zn | 0 to 0.3 | |
| Fe | 0 to 0.1 | |
| Pb | 0 to 0.050 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
Copper: Its Trade, Manufacture, Use, and Environmental Status, Gunter Joseph, 2001