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.

 Click here to download a C63000 / AMS 4640 data sheet.

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