About Smiths Advanced

We are a leading stockholder and global supplier of metals and plastics into Aerospace & Space, Chemical, Defence, Medical, MRO, Naval, Nuclear, Oil & Gas and Power industries.

We make high quality materials available in a fast, cost-effective and convenient package and provide a consistent supply path for all our customers.

Supply Packages

DEF STAN 02-879 (Annex C) Grade 1

Hydrogen embrittlement resistance

DEF STAN 02-879 (Annex C) Grade 1 provides excellent resistance to hydrogen embrittlement.

Our product is a copper-nickel alloy released to the British Defence Standard and a direct equivalent of copper-nickel 90/10.

In this case, the standard defines the UK Ministry of Defence (MOD) requirement for using engineering raw materials in applications, including for the Royal Navy. Releases of DEF STAN material are usually to the most stringent standards.

About the Alloy

DEF STAN 02-879 (Annex C) Grade 1 is a direct equivalent to 90/10 copper-nickel alloy, replacing DEF STAN 02-779 and NES 779. As the name suggests, the alloy represents a mix of 90% copper and 10% nickel with trace additions of other elements to improve strength and corrosion resistance.

The material offers a combination of high toughness and ductility, which is highly suitable for use in the marine sector. The alloy provides excellent resistance to saltwater corrosion and high hydrogen embrittlement resistance. DEF STAN 02-879 also operates well in biological fouling environments and retains its mechanic properties at cryogenic temperatures. Both welding and fabricability are excellent.

DEF STAN 02-879 (Annex C) Grade 1 Copper Nickel Datasheet

Use in Commercial Engineering

The alloy is highly suitable for seawater applications above and below the water line.

An additional benefit is the alloy's anti-microbial characteristics, as it destroys most pathogens within a few hours of exposure. The copper-nickel grade has become increasingly popular in hygienic environments such as clean rooms.

Product Features:

    DEF STAN 02-879 Annex C
    DEF STAN 02-779

    Pressure vessels
    Heat exchangers
    Valve and pump components
    Sanitary environments

    Resists hydrogen embrittlement
    High toughness and ductility
    Anti-microbial characteristics
    Excellent corrosion resistance in saltwater and brackish water

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