As Hot Rolled (M20) C51100 Bronze
M20 C51100 bronze is C51100 bronze in the M20 (as hot rolled) condition. It has the second lowest strength and highest ductility compared to the other variants of C51100 bronze. The graph bars on the material properties cards below compare M20 C51100 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
50 %
Poisson's Ratio
0.34
Shear Modulus
42 GPa 6.1 x 106 psi
Shear Strength
250 MPa 36 x 103 psi
Tensile Strength: Ultimate (UTS)
350 MPa 50 x 103 psi
Tensile Strength: Yield (Proof)
110 MPa 17 x 103 psi
Thermal Properties
Latent Heat of Fusion
200 J/g
Maximum Temperature: Mechanical
190 °C 370 °F
Melting Completion (Liquidus)
1060 °C 1950 °F
Melting Onset (Solidus)
970 °C 1790 °F
Specific Heat Capacity
380 J/kg-K 0.090 BTU/lb-°F
Thermal Conductivity
84 W/m-K 49 BTU/h-ft-°F
Thermal Expansion
18 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
20 % IACS
Electrical Conductivity: Equal Weight (Specific)
20 % IACS
Otherwise Unclassified Properties
Base Metal Price
32 % relative
Density
8.9 g/cm3 550 lb/ft3
Embodied Carbon
3.0 kg CO2/kg material
Embodied Energy
48 MJ/kg 21 x 103 BTU/lb
Embodied Water
340 L/kg 41 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
140 MJ/m3
Resilience: Unit (Modulus of Resilience)
58 kJ/m3
Stiffness to Weight: Axial
7.1 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
11 points
Strength to Weight: Bending
12 points
Thermal Diffusivity
25 mm2/s
Thermal Shock Resistance
12 points
Alloy Composition
| Cu | 93.8 to 96.5 | |
| Sn | 3.5 to 4.9 | |
| 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
ASTM B103: Standard Specification for Phosphor Bronze Plate, Sheet, Strip, and Rolled Bar
ASM Specialty Handbook: Copper and Copper Alloys, J. R. Davis (editor), 2001