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.

Finishing Options

Copper Nickel 70/30 Copper Bar

Cupronickel alloy.


Smiths Advanced Metals stocks Copper Nickel 70/30 bars in the annealed condition.

Copper Nickel 70/30 cupronickel bars are suitable for the most demanding applications.


Copper Nickel 70/30 is a cupronickel alloy that offers slightly better strength than 90/10. The added strength is due to further additions of iron and manganese during the alloying process, resulting in a more suitable product for demanding applications. The alloying process also increases the erosion and corrosion resistance of the material. The overall corrosion resistance of 70/30 shows a marked improvement, particularly in high velocity or polluted waters. Offering a combination of excellent corrosion and pitting resistance in marine environments, the alloy is commonly used in the petrochemical, oil and gas industry, and marine applications.


Stock Availability

Smiths Advanced Metals stocks Copper Nickel 70/30 bars in the annealed condition with bars available in a variety of sizes.



Copper Nickel 70 30 Datasheet

Commercial Applications

Copper-nickel 70/30 finds use in boiler parts, heat exchangers, saltwater flanges, pump components and evaporator tubes.



Product Features:


    ASTM B151
    BS 2874
    DEF STAN 02-780
    DEF STAN 02-879
    CN107
    CuNi30Mn1Fe
    CW354H
    NES780
    UNS C71500

    Heat exchangers
    Saltwater flanges
    Pump components
    Evaporator tubes

    Excellent corrosion resistance
    Excellent pitting resistance
    Readily cold worked, fabricated and welded
    Ideal for demanding applications

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