Copper Alloys, Copper-Nickel (Cupro-Nickel)DEFSTAN 02-879 (NES879)

A 70% copper, 30% nickel alloy with additions of iron and manganese.

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.

In particular, its corrosion resistance is notably improved in high-velocity waters (up to 4.5m/s) and polluted seawater.

Righton Blackburns carries the UK's largest range of product in this alloy.

Range

Product Form	Size Range
Round Bar DEFSTAN 02-⁷⁸⁰⁄₈₇₉	25mm - 230mm

If you do not see what you are looking for, please contact your local service centre with your specific requirements.

Related Specifications

70/30- NES 780/DEFSTAN 02‐780

C71500
CN107
CuNi30
DEFSTAN 02‐879 Pt 2

Properties

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

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

Physical Property	Value
Density	8.95 g/cm³
Thermal Conductivity	29.0 W/m.K
Melting Point	1170-1240 °C

Applications

Salt water flanges, salt water piping and pipe fittings, valve bodies, sea water intakes, pipe
fittings, water boxes, propeller sleeves, pump bodies and parts
Marine hardware
Heat exchangers
Condensers
Desalination units
Evaporator tubes, distiller tubes, refrigerator and condenser components
Flexible metal hose
Boiler parts
Pipework
Submarine components

Characteristics

Excellent corrosion and pitting resistance in marine environments
Good strength and toughness
Resistance to biofouling
Readily weldable and fabricated

Find your local Service Centre

Experienced multi-product specialists
In-house state of the art processing facilities
Large fleet of bespoke delivery vehicles

Disclaimer

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 S 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.