UNS C50100 Phosphor Bronze
C50100 bronze is a bronze formulated for primary forming into wrought products. Cited properties are appropriate for the O61 (annealed) temper.
It has the highest melting temperature among wrought bronzes. In addition, it has a moderately high electrical conductivity and a fairly low tensile strength.
The graph bars on the material properties cards below compare C50100 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
120 GPa 17 x 106 psi
Elongation at Break
40 %
Poisson's Ratio
0.34
Rockwell Superficial 30T Hardness
35
Shear Modulus
43 GPa 6.2 x 106 psi
Shear Strength
180 MPa 26 x 103 psi
Tensile Strength: Ultimate (UTS)
270 MPa 39 x 103 psi
Tensile Strength: Yield (Proof)
82 MPa 12 x 103 psi
Thermal Properties
Latent Heat of Fusion
210 J/g
Maximum Temperature: Mechanical
200 °C 390 °F
Melting Completion (Liquidus)
1080 °C 1980 °F
Melting Onset (Solidus)
1070 °C 1950 °F
Specific Heat Capacity
380 J/kg-K 0.092 BTU/lb-°F
Thermal Conductivity
230 W/m-K 130 BTU/h-ft-°F
Thermal Expansion
17 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
55 % IACS
Electrical Conductivity: Equal Weight (Specific)
55 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
8.9 g/cm3 560 lb/ft3
Embodied Carbon
2.6 kg CO2/kg material
Embodied Energy
42 MJ/kg 18 x 103 BTU/lb
Embodied Water
310 L/kg 37 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
82 MJ/m3
Resilience: Unit (Modulus of Resilience)
29 kJ/m3
Stiffness to Weight: Axial
7.2 points
Stiffness to Weight: Bending
18 points
Strength to Weight: Axial
8.3 points
Strength to Weight: Bending
10 points
Thermal Diffusivity
66 mm2/s
Thermal Shock Resistance
9.5 points
Alloy Composition
Among wrought copper alloys, the composition of C50100 bronze is notable for including phosphorus (P) and tin (Sn). Phosphorus is used as an alloy deoxidizer, and to reduce vulnerability to dezincification. Tin is used to improve strength, bearing properties, and corrosion resistance against certain types of media.
| Cu | 98.6 to 99.49 | |
| Sn | 0.5 to 0.8 | |
| P | 0.010 to 0.050 | |
| Fe | 0 to 0.050 | |
| Pb | 0 to 0.050 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.