Copper-nickel alloys (often referred to as cupro-nickels) offer moderate to high strength and excellent resistance to various waters, including seawater and form a protective surface film in such conditions. In addition they provide good anti-fouling properties and weldability.

The precipitation hardenable copper nickels (DEF STAN 02-835 and ULTIBRON™-NB) possess high strength and are used as an alternative to the 90/10 and 70/30 alloys and other copper alloys such as nickel aluminium bronze in marine applications. Other useful attributes include low magnetic permeability, imperviousness to hydrogen embrittlement, no loss of impact strength down to minus 196°C and good jet impingement resistance.

Applications for 90/10 and 70/30 alloys mainly involve tubes and tube plates in heat exchangers, including desalination and seawater piping systems. 70/30 alloy is also used for hose couplings, mechanical seals and pump shafts. Applications for the high strength cupro-nickels are varied and cover subsea bolting in Oil & Gas to hydraulic connectors and valve stems.

Usage in Naval vessels is widespread, for example, for bolting, propeller shafts, sonar components and weapons handling equipment. Copper-nickel alloys are also finding new applications replacing beryllium-copper alloys due to environmental difficulties in their manufacture.

Reliable Pipes & Tubes Limited maintains a broad inventory of Copper Nickel, also known as cupro nickel, C70600 (90/10) and C71500 (70/30) in pipe form. Our inventory of ASTM B466/ASME SB466 is composed of C706 in SCH 40 & 80, along with Class 200, Cupro Nickel Tubes 95/5, 90/10 & 70/30

The addition of nickel to copper improves strength and corrosion resistance but good ductility is retained. Copper-nickel alloys have excellent resistance to marine corrosion and biofouling.

The two main alloys are 90/10 and 70/30. The 70/30 is stronger and has greater resistance to sea water flow; but the 90/10 will provide good service for most applications and being less expensive tends to be more widely used. Both alloys contain small but important additions of iron and manganese which have been chosen to provide the best combination of resistance to flowing sea water and to overall corrosion.

Copper-nickel alloys are widely used for marine applications due to their excellent resistance to seawater corrosion, high inherent resistance to biofouling and good fabricability. They have provided reliable service for several decades whilst offering effective solutions to todays technological challenges.

• Sea water pipework
• Offshore fire water systems
• Heat exchangers and condensers
• Sheathing of legs and risers on offshore platforms and boat hulls
• Hydraulic lines
• Fish cages for aquaculture
• Desalination units.

Copper-nickel alloys (often referred to as cupro-nickels) offer moderate to high strength and excellent resistance to various waters, including seawater and form a protective surface film in such conditions. In addition they provide good anti-fouling properties and weldability.

The precipitation hardenable copper nickels (DEF STAN 02-835 and ULTIBRON™-NB) possess high strength and are used as an alternative to the 90/10 and 70/30 alloys and other copper alloys such as nickel aluminium bronze in marine applications. Other useful attributes include low magnetic permeability, imperviousness to hydrogen embrittlement, no loss of impact strength down to minus 196°C and good jet impingement resistance.

Applications for 90/10 and 70/30 alloys mainly involve tubes and tube plates in heat exchangers, including desalination and seawater piping systems. 70/30 alloy is also used for hose couplings, mechanical seals and pump shafts. Applications for the high strength cupro-nickels are varied and cover subsea bolting in Oil & Gas to hydraulic connectors and valve stems.

Usage in Naval vessels is widespread, for example, for bolting, propeller shafts, sonar components and weapons handling equipment. Copper-nickel alloys are also finding new applications replacing beryllium-copper alloys due to environmental difficulties in their manufacture.

Reliable Pipes & Tubes Limited maintains a broad inventory of Copper Nickel, also known as cupro nickel, C70600 (90/10) and C71500 (70/30) in pipe form. Our inventory of ASTM B466/ASME SB466 is composed of C706 in SCH 40 & 80, along with Class 200, Cupro Nickel Tubes 95/5, 90/10 & 70/30

The addition of nickel to copper improves strength and corrosion resistance but good ductility is retained. Copper-nickel alloys have excellent resistance to marine corrosion and biofouling.

The two main alloys are 90/10 and 70/30. The 70/30 is stronger and has greater resistance to sea water flow; but the 90/10 will provide good service for most applications and being less expensive tends to be more widely used. Both alloys contain small but important additions of iron and manganese which have been chosen to provide the best combination of resistance to flowing sea water and to overall corrosion.

Copper-nickel alloys are widely used for marine applications due to their excellent resistance to seawater corrosion, high inherent resistance to biofouling and good fabricability. They have provided reliable service for several decades whilst offering effective solutions to todays technological challenges.

• Sea water pipework
• Offshore fire water systems
• Heat exchangers and condensers
• Sheathing of legs and risers on offshore platforms and boat hulls
• Hydraulic lines
• Fish cages for aquaculture
• Desalination units.