UNS C51000 Phosphor Bronze Flat Products - Mechanical Properties

Sep 27 2012

Phosphor Bronze UNS C51000 has a copper content of not less than 94%.

The following table shows the mechanical properties of UNS C51000 flat products as a function of heat treatment and thickness.

Temper Thickness Tensile Str. Yield Str. Elong. Rockwell Fatigue Str.
B C F 30T
H01 - 340MPa (49ksi) - 24% - - - - -
H02 - 455MPa (66ksi) - 24% 78 - - 69 -
H04 1mm (0.04in) 579MPa (84ksi) - 7% 87 - - 75 172MPa (25ksi)
H06 1mm (0.04in) 662MPa (96ksi) - 3% 93 - - 78 -
H08 1mm (0.04in) 710MPa (103ksi) - 3% 95 - - 79 152MPa (22ksi)
H10 1mm (0.04in) 738MPa (107ksi) - 2% 97 80 -
HR02 - 455MPa (66ksi) - 28% - - - - -
HR04 - 579MPa (84ksi) - 14% - - - - -
HR06 - 662MPa (96ksi) - 11% - - - - -
HR08 - 710MPa (103ksi) - 9% - - - - -
M20 - 345MPa (50ksi) - - - - - - -
O60 - 345MPa (50ksi) - - 40 - - - -
O61 - 315MPa (46ksi) - - 47 - - - -
OS015 1mm (0.04in) 365MPa (53ksi) 152MPa (22ksi) 50% 34 - 79 - -
OS025 1mm (0.04in) 345MPa (50ksi) 145MPa (21ksi) 52% 30 - 77 - -
OS035 1mm (0.04in) 338MPa (49ksi) 138MPa (20ksi) 58% 28 - 75 - -
OS050 1mm (0.04in) 324MPa (47ksi) 131MPa (19ksi) 64% 26 - 73 - -

Equivalent materials to UNS C51000 copper alloy are the following:

  • AMS 4720
  • ASTM B100
  • ASTM B103
  • ASTM B139
  • ASTM B159
  • ASTM F467
  • ASTM F468
  • MIL B-13501
  • MIL W-6712
  • QQ W321
  • SAE J461
  • SAE J463

The chemical composition of UNS C51000 copper alloy is outlined in the following table.

Element Content (%)
Tin, Sn 4.2-5.8
Zinc, Zn 0.3
Iron, Fe 0.1
Lead, Pb 0.05
Phosphorous, P 0.03-0.35
Copper, Cu Balance

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