C63000 / AMS4640


C63000 / AMS4640

C63000 / AMS 4640 is the most popular American grade of nickel aluminum bronze. With a chemical composition of approximately 10% aluminium, 5% nickel and 3% iron, it offers high strength, hardness and a very good corrosion resistance, as well as toughness and an excellent resistance to wear, shock and abrasion.

C63000 / AMS 4640 is readily hot worked and offers a good machinability. The alloy displays good erosion and cavitation resistance in seawater and brackish water, together with a good resistance to dilute sulphuric, hydrochloric and non-oxidising acids. Columbia Metals stocks C63000 in the HR50 condition to meet the requirements of AMS4640.

Related Specifications of C63000 / AMS 4640

  • CA104
  • CA105
  • C63020
  • CW307G
  • ASTM B150
  • EN 12163
  • BS2874
  • BS2875
  • 2.0966
  • NF A51-116
  • NF L14-705
  • CuAl10Ni5Fe4
  • CuAl9Ni5Fe3 (FR)
  • CuAl9Ni5Fe4 (FR)

Nominal Composition of C63000 / AMS 4640

Cu rem, Al 9.5%, Fe 2.5%, Ni 5.5%, Mn 1.5%

Mechanical Properties of C63000 / AMS 4640

Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%) Hardness (HB)
550-690 275-345 5-12

Key Features

  • 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 fabrication and welding properties

Applications of C63000 / AMS 4640

Offshore & marine | Marine fasteners, hardware and fittings

Aerospace | Landing gear components, thrust washers, gears, control bushes, faucet balls, springs and worm wheels

Other | Non-sparking safety tooling, valve stems and seats, wear plates, welding clamps, valve spindles and components, fasteners and bearing bushes

Columbia Metals – a leading supplier of C63000 / AMS 4640

With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of C63000 / AMS 4640 and other high quality specialist engineering alloys.

To buy or learn more about C63000 / AMS 4640 contact us now, or fill in the enquiry form on the right hand side and we will be in touch shortly.

  Related Specifications Mechanical Properties
Alloy Name BS UNS BS EN Others Ultimate Tensile Strength N/mm² Minimum Yield Strength N/mm² Elongation % Hardness HB  
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