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DEF STAN 02-780 (NES780) Copper Nickel AlloyDEF STAN 02-780 (NES780) Copper Nickel Alloy

Cupronickel - Copper Nickel Alloy

DEF STAN 02-780 (NES780) is a cupronickel alloy (copper nickel) which contains 70% copper and 30% nickel, this alloy was formally known as CN107.

The alloy includes small additions of iron and manganese to improve resistance to high velocity seawater. DEF STAN 02-780 (NES780) can be used in more demanding applications than DEF STAN 02-779 (NES779) as it has higher strength once annealed. The alloy naturally produces a protective oxide film (or patina) which prevents marine growth in subsea service. DEF STAN 02-780 (NES780) is easily formed, easily welded and easy to fabricate with good hot and cold working properties.

Key Features:

DEF STAN 02-780 (NES780) Copper Nickel Alloy is a 70/30 copper nickel with small additions of iron and manganese to improve resistance to high velocity seawater. It has higher strength and better corrosion resistance when compared with 90/10 alloy but has slightly reduced anti-fouling properties. We offer this material in Grade 1 and it 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.

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.

Download DEF STAN 02-780 (NES780) Copper Nickel Alloy Datasheet

Typical Applications:

  • Seawater service applications
  • Marine hardware
  • Above sea and subsea fittings
  • Heat exchangers
  • Condensers
  • Desalination units
  • Pipework
  • Submarine components


We offer DEF STAN 02-780 (NES780) Copper Nickel Alloy in bar, hexagon, sheet and tube. Smiths Metal Centres has processing operations at all our UK service centre locations. We have a fully automated magazine feed CNC rod blanking line and with more than 30 power saws across the Group, we can cut your material to your size requirements.

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To find out more about Smiths Metal Centres extensive range of high quality copper nickel alloys, click on one of our products on the side menu of this web page.

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