Copper and Copper Alloys - NES 879 DEFSTAN 02-879 (70/30)

NES 879 DEFSTAN 02-879 (70/30)

Copper Nickel 70/30 is stronger than the more common copper nickel 90/10 and is able to withstand corrosion at higher velocities in marine applications, making it the favourable choice in submarine systems. Righton carry the UK's largest range of product in this alloy.

Chemical Composition



Chemical Element % Present
Iron (Fe) 0.60 - 1.00
Manganese (Mn) 0.50 - 1.50
Nickel (Ni) 29.00 - 32.00
Copper (Cu) Balance


Physical PropertyValue
Density 895 g/cm³
Thermal Conductivity 29.0 W/m.K
Melting Point 1170-1240 °C



Mechanical PropertyValue
Elongation A50 mm 34 %
Proof Stress 120 MPa
Tensile Strength 330 MPa

Alloy Designations

70/30- NES 780/ Def Stan 02‐780




Def Stan 02‐879 Pt 2

Supplied Forms

  • Sheet
  • Bar
  • Plate
  • Rod
  • Forgings
  • Pipe
  • Castings
  • Fittings & Flanges
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Last Datasheet Revision

22 July 2016


This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.

Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed & online) and manufacturers’ data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.

Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied.

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