C63000 / AMS4640

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ASTM B150: C63000 / AMS4640 is one of the most commonly used American grades of nickel aluminium bronze. Containing around 10% aluminium, 5% nickel and 3% iron the alloy offers an inherent high strength and hardness combined with a very good toughness and an excellent resistance to wear, shock and abrasion.

The C63000 / AMS4640 also offers a very good corrosion, erosion and cavitation resistance in seawater and brackish water together with a good resistance to dilute sulphuric, hydrochloric and non-oxidising acids. It also has a very good galling resistance and also offers a high retention of mechanical properties at elevated temperatures.

The C63000 is generally sourced by Holme Dodsworth to the high strength HR50 condition to meet the requirements of AMS4640 grade.

Related Specifications

ASTM B150: C63000

ASTM B171: C63000

AMS4640

BSEN12163: CW307G

Chemical Composition

Copper

Rem

Aluminium                                         

9.0 - 11.0%

Nickel                                                   

4.0 - 5.5%

Iron                                                       

2.0 - 4.0%

Manganese                                       

1.50% max

Silicon                  

0.25% max

Tin

0.20% max

Zinc

0.30% max

Minimum Mechanical Properties for ASTM B150: C63000 HR50 (high strength) / AMS4640

Diameter

25mm and under

25-50mm incl.

50-80mm

UTS

760 N/mm2

760 N/mm2

725 N/mm2

0.2% Proof Strength

470 N/mm2

415 N/mm2

380 N/mm2

Elongation

10%

10%

10%

Hardness

Up to 50.8mm 201-248 HB

50.8mm – 127mm 187-241 HB

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

Typical Physical Properties

Density

7.58 gm/cm3

Melting Point

1035-1054?C

Annealing Temperature

600-700?C

Thermal Conductivity

38-46 W/m?C

Coefficient of Thermal Expansion 20-300?C

16.2 x 10-6

Electrical Conductivity 20?C

7-9% IACS

Fabrication Properties

Stress Relieving temperature

300-400?C

Hot working temperature 

850 - 975°C

Hot formability

Good

Cold Formability

Limited

Machinability Rating

20%

Joining Methods

Soldering

Not recommended

Brazing

Fair

MIG Welding

Good

TIG Welding

Good

Resistance Welding

Good

Typical Applications: 

Typical applications for the C63000 material includes marine fasteners, hardware and fittings, aerospace landing gear components, thrust washers, gears, control bushes, faucet balls, springs & worm wheels, Non-sparking safety tooling, valve stems and seats, wear plates, welding clamps, valve spindles and components, fasteners and bearing bushes.

This technical information is given by Holme Dodsworth Metals without charge and the user shall employ such information at their own discretion and risk. For more detailed technical advice on temper selection, fabrication, joining, machining, physical and mechanical data please contact us as space does not permit the listing of every feature of the material.

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Holme Dodsworth Metals Limited.
59/69 Heaton Park Road.
Newcastle Upon Tyne NE6 1SQ
Registered in England. Company No. 00842702