UNS C53800 Leaded Phosphor Bronze
C53800 bronze is a bronze formulated for primary forming into wrought products. Cited properties are appropriate for the H08 (spring) temper. It has the highest base cost among wrought bronzes. In addition, it has the lowest melting temperature and the lowest heat capacity.
The graph bars on the material properties cards below compare C53800 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 15 x 106 psi
Elongation at Break
2.3 %
Poisson's Ratio
0.34
Shear Modulus
40 GPa 5.8 x 106 psi
Shear Strength
470 MPa 69 x 103 psi
Tensile Strength: Ultimate (UTS)
830 MPa 120 x 103 psi
Tensile Strength: Yield (Proof)
660 MPa 95 x 103 psi
Thermal Properties
Latent Heat of Fusion
190 J/g
Maximum Temperature: Mechanical
160 °C 320 °F
Melting Completion (Liquidus)
980 °C 1800 °F
Melting Onset (Solidus)
800 °C 1470 °F
Specific Heat Capacity
360 J/kg-K 0.087 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
9.0 % IACS
Electrical Conductivity: Equal Weight (Specific)
9.3 % IACS
Otherwise Unclassified Properties
Base Metal Price
37 % relative
Density
8.7 g/cm3 550 lb/ft3
Embodied Carbon
3.9 kg CO2/kg material
Embodied Energy
64 MJ/kg 28 x 103 BTU/lb
Embodied Water
420 L/kg 50 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
18 MJ/m3
Resilience: Unit (Modulus of Resilience)
2020 kJ/m3
Stiffness to Weight: Axial
6.8 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
26 points
Strength to Weight: Bending
22 points
Thermal Diffusivity
19 mm2/s
Thermal Shock Resistance
31 points
Alloy Composition
Among wrought copper alloys, the composition of C53800 bronze is notable for including manganese (Mn) and tin (Sn). Manganese is used to improve strength without a proportional reduction in ductility. Tin is used to improve strength, bearing properties, and corrosion resistance against certain types of media.
| Cu | 85.1 to 86.5 | |
| Sn | 13.1 to 13.9 | |
| Pb | 0.4 to 0.6 | |
| Zn | 0 to 0.12 | |
| Mn | 0 to 0.060 | |
| Ni | 0 to 0.030 | |
| Fe | 0 to 0.030 | |
| res. | 0 to 0.2 |
All values are % weight. Ranges represent what is permitted under applicable standards.