Copper Alloys, Aluminium BronzeC63000 (B150) Bar & Forgings

A high strength nickel aluminum bronze with good corrosion resistance in sea water.

ASTM B150: C63000 (AMS4640) is one of the most commonly used American grades of nickel aluminium bronze and contains around 10% aluminium, 5% nickel and 3% iron.

B150 C63000 offers an array of properties including high strength and hardness, excellent resistance to wear, shock and abrasion. Another major benefit of this alloy is its ability to offer a high retention of its mechanical properties at elevated temperatures. C63000 / AMS 4640 is readily hot worked and offers a good machinability.

The C63000 (AMS4640) can also offer additional properties including good erosion, corrosion and cavitation resistance in seawater, as well as resistance to dilute sulphuric, hydrochloric and non-oxidising acids.

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Related Specifications

  • AMS 4640
  • UNS C63000
  • ASTM B150
  • BSEN12163: CW307G
  • CA104
  • CA105
  • C63020
  • BS2874
  • BS2875
  • 2.0966
  • NF A51-116
  • NF L14-705
  • CuAl10Ni5Fe4
  • CuAl9Ni5Fe3 (FR)
  • CuAl9Ni5Fe4 (FR)


Chemical Composition


  • Aerospace landing gear components
  • Marine fasteners, hardware and fittings
  • Thrust washers
  • Gears
  • Control bushes, valve spindles and components
  • Faucet balls, springs & worm wheels
  • Non-sparking safety tooling
  • Wear plates
  • Valve stems and seats
  • Welding clamps
  • Fasteners
  • Bearing bushes


  • Very good strength and toughness
  • High resistance to corrosion and erosion
  • Retention of properties at cryogenic temperatures
  • Excellent resistance to shock, wear and abrasion
  • Spark resistance
  • Good machinability
  • Readily hot worked
  • Good resistance to dilute sulphuric, hydrochloric and non-oxidising acids

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