Trademark Alloys


ZAMALLOY (CW704R) is an alloy of copper, zinc, aluminium, iron and manganese. It is a high tensile brass with much higher alloying levels than conventional high tensile brasses, especially aluminium. The alloying additions give this grade strength.

ZAMALLOY (CW704R) is selected for its excellent resistance to corrosion, erosion, wear, abrasion and fatigue, together with high strength and anti-friction and galling resistance properties.

Related Specifications of ZAMALLOY (CW704R)

  • C67000
  • CW704R
  • UZ19A6
  • UZ19Al6
  • NFL 14-707
  • CuZn23Al6Mn4Fe3 (EU)
  • CuZn19Al6 (FR)
  • CuZn23Al6Mn4Fe3Pb (DE)

Nominal Composition of ZAMALLOY (CW704R)

Cu rem, Zn 18.5%, Al 6.5%, Mn 5.5%, Fe 3.0%

Mechanical Properties of ZAMALLOY (CW704R)

Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%) Hardness (HB)
780-830 540-590 7-10

Key Features of ZAMALLOY (CW704R)

  • Excellent strength and hardness levels
  • High resistance to corrosion and erosion
  • Excellent resistance to abrasion and wear
  • Machinability and good hot formability
  • Good anti-friction and galling resistance

Applications of ZAMALLOY (CW704R)

Aerospace | Landing gear

Other | Heat exchange, evaporator, condenser and desalination plant and equipment, high strength fasteners, pump and valve trim, landing gear, heavy duty bearing bushes; general engineering applications such as shafts, axles, pins and other fasteners

Columbia Metals – a leading supplier of ZAMALLOY (CW704R)

With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of ZAMALLOY (CW704R) and other high quality specialist engineering alloys.

To buy or learn more about ZAMALLOY (CW704R) 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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