About Smiths

We are a world-class supplier of engineering raw materials. Our objective is to provide all our customers, from the small machine shop to the large multi-national corporation, a supply path that continuously delivers the highest levels of service, quality and value.

DEF STAN 02 779 (NES 779)

Copper Nickel Alloy

NES 779 Copper Nickel Alloy

DEF STAN 02-779 (NES779) is a cupronickel alloy (copper-nickel) which contains 90% copper and 10% nickel; the alloy was formally known as CN102.

For Marine Environments

The chemical structure of the alloy is further enhanced by the introduction of iron and manganese to improve overall strength and corrosion resistance. The corrosion resistance of the alloy is outstanding, and DEF STAN 02-779 (NES779) finds traditional use in marine environments due to the low rates of corrosion in seawater. The alloy also offers excellent resistance from crevice and stress corrosion. With enhanced durability, DEF STAN 02-779 (NES779) is easily joined, formed and fabricated.


DEF STAN 02-779 (NES779) Copper Nickel Alloy offers outstanding corrosion resistance. The alloy has a pleasing aesthetic appearance and is oxidation resistant. It is easily joined and has high ductility and durability. We offer this material in Grade 1, which is ultrasonically tested to DEF STAN 02-729 Part 5 Issue 3, supplied with 3.2 certification as standard and to NDE02-05 latest revision.

Typical Applications

Commercial applications for this engineering material include:

  • Architectural panelling & fascias
  • Marine hardware
  • Heat exchangers
  • Cooling plants
  • Valves & pumps
  • Crankshafts
  • Flanges
  • Hot water tanks

We stock NES 779 in round bar.

Technical Assistance

Our knowledgeable staff and resident metallurgists will be pleased to assist you further on any technical topic. Smiths Metal Centres Limited also boasts an in-house UKAS Accredited Testing Laboratory which is unique within the multi-metal and plastic stockholding sector. We believe this underlines our total commitment to quality and our ethos of being the complete service provider.

Additional Info

A technical datasheet for NES 779 is available in PDF file format. To view and download, please click here.

We offer in-house processing options - for more information, please refer to our processing services.

Read our corporate brochure by clicking here.

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