ISO/TR 15608 Material Group 34:
Copper-nickel alloys
CUPRONICKEL
90-10 copper-nickel (CW352H), an alloy with 90% copper and 10% nickel, is the most commonly used alloy. It can be found in naval and commercial shipping, offshore oil and gas production as well as desalination and power generation. Alloys with 30% nickel content (CW353H and CW354H) and those which are more highly alloyed with aluminum, chromium or tin are used where greater resistance to seawater flow, sand abrasion, wear and galling, as well as higher mechanical properties, are required.
This material has a very high corrosion-resistance and has thermal stability. This material also exhibits a very high tolerance to corrosion cracking under stress and oxidation in a steam or moist air environment. Higher nickel content in this material will have improved corrosion resistance in seawater, and resistance to marine biological fouling.
Application for CUPRONICKEL
This material is typically found in marine equipment like sea water piping, valves, pumps and heat exchanger end plates and tubes. They materials are very well suited for applications in cryogenics as well as for other low-temperature applications in marine and off-shore technology or in liquefied natural gas (LNG) technology and plants.
Weldability of CUPRONICKEL
Copper nickel alloys are the most commonly used in welded fabrication projects. Phosphorus and sulphur levels in these alloys is less than 0.02% to ensure good welds. Most copper nickel alloys do not contain a deoxidizer. Therefore, fusion welding requires the addition of a deoxidized filler metal. This lowers the risk of porosity in the weld.
No preheating or post heating normally necessary. Interpass temperatures should be maintained below 65°C (150°F). Stress relieving temperature for welds 538 °C (1000 °F).
Typical CUPRONICKEL materials ISO/TR 15608 material group 34
| Name / Grade | Number | Standard | Product | Remarks |
|---|---|---|---|---|
| – – | C70400 C70400 | ASTM B-111 ASTM B-543 | Smls. tube Welded tube | ASME BPVC ASME BPVC |
| CuNi25 | CW350H C71300 | EN 1652 – | Plate, sheet, stripe – | – – |
| CuNi9Sn2 | CW351H C72500 | EN 1652 – | Plate, sheet, stripe – | – – |
| CuNi10Fe1Mn CuNi10Fe1Mn CuNi10Fe1Mn CuNi10Fe1Mn CuNi10Fe1Mn CuNi10Fe1Mn – – – – – – – – – | CW352H CW352H CW352H CW352H CW352H CW352H C70600 C70600 C70600 C70600 C70600 C70600 C70600 C70600 C70600 | EN 1652 EN 1653 EN 12420 EN 12449 EN 12451 EN 12452 ASTM B-111 ASTM B-151 ASTM B-171 ASTM B-359 ASME B-395 ASTM B-466 ASTM B-467 ASTM B-543 ASTM B-956 | Plate, sheet, stripe Plate for pressure vessels & boilers Forging Smls. tubes Smls. tube for heat exchangers Finned, smls. tubes for heat exchangers Smls. tubes Rod & Bar Plate & Sheet Smls. tube Smls. tube Smls. pipe & tube Welded pipe Welded tube Finned welded tube | – – – – – – ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| – – – – – – – – – – | C70620 C70620 C70620 C70620 C70620 C70620 C70620 C70620 C70620 C70620 | ASTM B-111 ASTM B-151 ASTM B-171 ASTM A-283 ASTM B-359 ASME B-395 ASTM B-466 ASTM B-467 ASTM B-543 ASTM B-956 | Smls. tubes Rod & Bar Plate & Sheet Forgings Smls. tube Smls. tube Smls. pipe & tube Welded pipe Welded tube Finned welded tube | ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| CuNi30Fe2Mn2 – – | CW353H C71640 C71640 | EN 12451 ASTM B-111 ASTM B-543 | Seamless tube for heat exchangers Seamless condenser tubes Welded tube | – – – |
| CuNi30Mn1Fe | CW354H CW354H CW354H CW354H CW354H C71500 C71500 C71500 C71500 C71500 C71500 C71500 | EN 1653 EN 12420 EN 12449 EN 12451 EN 12452 ASTM B-111 ASTM B-171 ASTM B-359 ASME B-395 ASTM B-466 ASTM B-543 ASTM B-956 | Plate for pressure vessels & boilers Forging Smls. tubes Seamless tube for heat exchangers Finned, smls. tubes for heat exchangers Smls. tubes Plate & Sheet Smls. tube Smls. tube Smls. pipe & tube Welded tube Finned welded tube | – – – – – ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| – – – – – – – – – | C71520 C71520 C71520 C71520 C71520 C71520 C71520 C71520 C71520 | ASTM B-111 ASTM B-171 ASTM A-283 ASTM B-359 ASME B-395 ASTM B-466 ASTM B-467 ASTM B-543 ASTM B-956 | Smls. tubes Plate & Sheet Forgings Smls. tube Smls. tube Smls. pipe & tube Welded pipe Welded tube Finned welded tube | ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| – | C72200 | ASTM B-111 | Smls. tubes | SME BPVC |
| – – – – | C71000 C71000 C71000 C71000 | ASTM B-111 ASTM B-359 ASTM B-395 ASTM B-466 | Smls. tubes Smls. tube Smls. tube Smls. pipe & tube | ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| CuNi10Fe1Mn1-C – | CC380H C96200 | EN 1982 ASTM B-369 | Casting Casting | – ASME BPVC |
| CuNi10Fe1Mn1-B – | CB380H C96200 | EN 1982 ASTM B-30 | Casting Casting | – – |
| CuNi30Fe1Mn1-C | CC381H | EN 1982 | Casting | – – |
| CuNi30Fe1Mn1-B | CB381H | EN 1982 | Casting | – – |
| CuNi30Cr2FeMnSi-C – | CC382H C91900 | EN 1982 ASTM B-30 | Casting Casting | – – |
| CuNi30Fe1Mn1NbSi-C – | CC383H C96400 | EN 1982 ASTM B-30 | Casting Casting | – – |