Phosphor Bronze Flat Products (UNS C50500) – Mechanical Properties

UNS C50500 phosphor bronze alloy has a copper content of not less than 98.7%.

The following table shows the mechanical properties of UNS C50500 flat products as a function of heat treatment and thickness.

Temper Thickness Tensile Str. Yield Str. Elong. Rockwell
B C F 30T
H02 1mm (0.04 in) 379 MPa (55 ksi) - 16% 64 - - 60
H04 1mm (0.04 in) 448 MPa (65 ksi) 345 MPa (50 ksi) 8% 75 - - 67
H08 1mm (0.04 in) 517 MPa (75 ksi) - 4% 79 - - 70
OS025 1mm (0.04 in) 276 MPa (40 ksi) 97 MPa (14 ksi) 48% 82 - 68 -

The chemical composition of UNS C50500 copper alloy is outlined in the following table.

Element Content (%)
Tin, Sn 1.0-1.7
Zinc 0.3
Iron, Fe 0.1
Lead, Pb 0.05
Phosphorous, P 0.03-.035
Copper, Cu Remainder

Equivalent materials to UNS C50500 copper alloy are:

  • ASTM B105
  • ASTM B508
  • ASTM B9

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