90/10 cupronickel is a 90% copper, 10% nickel alloy that also contains small but important additions of iron and manganese to enhance overall strength corrosion resistance. This, combined with high ductility and toughness, makes it a popular grade for marine, architectural and industrial applications.
90/10 alloy offers designers and specifiers excellent resistance to stress corrosion, erosion, and biofouling in seawater and brackish water, excellent fabrication and welding properties, a high resistance to hydrogen embrittlement and the retention of mechanical properties down to cryogenic temperatures.
The material is released to the Defence Standard DEF STAN 02-879 Annex C, which supersedes both DEF STAN 02-779 and NES 779.
The most popular specifications in Europe and America are C70600, CN102 and CW352. These grades are most commonly specified within the marine, offshore, chemical, petrochemical and shipbuilding industries and are also widely used for handling seawater in all types of heat exchanger and cooling plant.
90/10 has undergone tests that indicate it has excellent antimicrobial properties. It is capable of killing 99.9% of a wide range of organisms within two hours, including MRSA, E.coli, influenza A (H1N1) and clostridium difficile. This has created a higher demand for the alloy in application areas such as hygienic and sanitary environments in hospitals, kitchens, nursing homes and other healthcare environments.
Related Specifications of 90/10
- DEF STAN 02-879 Annex C
- DEF STAN 02-779
- NES 779
- ASTM B151
- EN 12163
- NF A51-115
Nominal Composition of 90/10
Cu rem, Ni 10.0%, Fe 1.5%, Mn 0.7%
Mechanical Properties of 90/10
|Ultimate Tensile Strength (N/mm²)||Proof Stress (N/mm²)||Elongation (%)||Hardness (HB)|
Key Features of 90/10
- High ductility and toughness
- Excellent resistance to erosion and corrosion in seawater
- Inherent resistance to biofouling
- Excellent fabrication and welding properties
- Retention of mechanical properties down to cryogenic temperatures
Applications of 90/10
Offshore & marine | Salt water pipes and fittings, hot water tanks, salt water baffles, propeller sleeves, valve and pump components, flanges, boat hulls, marine fittings and marine hardware
Chemical processing | Heat exchanger and cooling plant, evaporator tubes, pump and valve trim
Other | Power steering tube, brake lines, condenser plates, pressure vessels and distiller tubes
Columbia Metals – a leading supplier of 90/10
With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of 90/10 and other high quality specialist engineering alloys.
To buy or learn more about 90/10 contact us now, or fill in the enquiry form on the right hand side and we will be in touch shortly.