Copper Alloys, Aluminium BronzeDEFSTAN 02-833 NES833 Bar

A nickel aluminium bronze manufactured to MOD standards primarily used in the marine & offshore industries.

Aluminium Bronze DEFSTAN 02-833 (NES833) is a nickel aluminium bronze similar to CA104 but manufactured to the requirements of the Ministry of Defence.

The MOD stipulate a nickel content that exceeds the iron content to improve the general corrosion performance. Other requirements include a minimum impact value on sizes above 15mm diameter and a full ultrasonic inspection to conform to Grade 1 material.

This grade has been developed primarily for offshore and marine applications but can also be used in the oil & petrochemical industries (non sparking environments) and features high strength, good ductility, excellent corrosion resistance in seawater and many other aggressive media and a high wear and abrasion resistance. The particular characteristics of DEF STAN 02-833 that enable its impressive physical properties include a nickel content exceeding the iron content in order to achieve good corrosion resistance.

We hold this material already 3.2 certified and ultrasonically tested to ensure that it meets the requirements of DEF STAN 02-729 Part 5 Issue 3 and to NDE02-05 latest revision.

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Product FormSize Range
Round Bar38" - 12"
Hexagon Bar Imperial0.92" - 2.22"
Hexagon Bar Metric13.0mm - 46.0mm
If you do not see what you are looking for, please contact your local service centre with your specific requirements.

Related Specifications

DEFSTAN (NES) 833 corresponds to the following designations:

  • DEF STAN 833
  • NES 833
  • DGS 1043
  • DGS 8452


Chemical Composition


  • Marine valves
  • Pumps
  • Weapons handling systems
  • Couplings
  • Fasteners
  • Gears
  • Marine propeller shafts
  • Valve components
  • Heat exchangers
  • Pipe fittings
  • Bearings & bushes
  • Safety tools
  • Worm wheels
  • Thrust washers


  • High strength and toughness
  • Outstanding resistance to erosion and corrosion
  • High wear and galling resistance
  • Excellent mechanical properties at sub-zero temperatures
  • Ultrasonically tested
  • Non sparking

Additional Information


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