Copper Alloys, Aluminium BronzeDEFSTAN 02-834 (NES834) Bar & Forgings

A silicon aluminium bronze alloy with high strength and very high corrosion resistance especially in seawater and marine environments.

DEF STAN 02-834 or NES834, is an aluminium bronze with a 2% silicon addition to enhance strength, corrosion resistance and impact strength compared with other grades of aluminium bronze. The silicon content also improves the machinability rating.

The latest Defence Standard for this material is DEF STAN 02-879 Annex D, a specification recognised for its controlled low magnetic permeability level of <1.005. Impact strength is maintained down to cryogenic temperatures.

Mainly used in naval engineering, nuclear, aerospace and defence applications.

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Related Specifications

  • DEF STAN 02-834
  • NES834
  • NES 834
  • DEF STAN 834
  • DGS1044


Chemical Composition


  • High strength and non-magnetic fasteners and components
  • Fasteners
  • Safety tooling
  • Valve components
  • Non-magnetic parts
  • Marine hardware
  • Gears
  • Bearings and bushes
  • Instrumentation components


  • High strength and toughness
  • Excellent corrosion resistance
  • High impact strength
  • Excellent wear resistance
  • Very low magnetic permeability
  • Good machinability
  • Excellent cryogenic properties

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