Copper and Copper Alloys - Copper-Nickel (Cupro-Nickel) - DEF STAN 02-780 ~ NES780

DEF STAN 02-780 ~ NES780

A 70/30 Copper/Nickel Alloy with high strength and very high corrosion resistance especially in seawater and marine enviroments. Mainly used in Naval Engineering, Aerospace and Defence Applications.

A wide range of metric and imperial tubes to this standard is available.

Chemical Composition


Chemical Element % Present
Nickel (Ni) 30.50 - 32.00
Iron (Fe) 0.60 - 1.00
Manganese (Mn) 0.50 - 1.50
Copper (Cu) Balance




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

Alloy Designations

DEF STAN 02-780


NES 780


Temper Types


    Supplied Forms

    Bar Grades 1 and 2
    Forgings Class 1, 2, 3, 4

    • Bar
    • Rod
    • Forgings
    • Tube
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    Last Datasheet Revision

    18 July 2019


    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.

    Advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. All transactions are subject to the Company’s current Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.