Alloy 400 (UNS N04400) is a nickel-copper alloy with excellent resistance to a wide range of corrosive environments. It is resistant to chloride stress corrosion cracking and has high strength and toughness over a wide range of temperatures.
The alloy is used extensively in many corrosive applications especially in the marine and chemical processing industries. Alloy 400 is readily fabricated by conventional processing operations.
Alloy 400AR is produced in the as-rolled condition to meet higher strength requirements.
Applications
1, Chemical Processing Equipment – in fluorine, hydrofluoric acid, hydrogen fluoride, hydrochloric acid, sulfuric acid, neutral and alkaline salt solutions, caustic alkalies, non-oxidizing halides and dry chlorine service.
2, Marine Components – shipbuilding, valves, pumps, shafts and in sea and brackish water
3, Oil and Gas Production – splash-zones for offshore structures and sour gas applications
4, Ore Processing – uranium refining and separation in the production of nuclear fuels
5, Petroleum Refining – alkylation units, crude petroleum stills, piping and storage tanks
6, Power Generation – feed-water heaters and steam generators
7, Water Treatment – brine heaters and evaporators in seawater desalination plants
Nickel (plus Cobalt) | 63.0 min.-70.0 max. | Iron | 2.50 |
Copper | 28.0 min.-34.0 max. | Sulfur | 0.024 |
Carbon | 0.3 | Silicon | 0.5 |
Manganese | 2.0 |
FORM AND CONDITION | Yield Strength | Tensile Strength | Elongation, % | Hardness | |||
ksi | MPa | ksi | MPa | Brinell | Rockwell | ||
Plate | |||||||
Hot-Rolled, As-Rolled | 40-75 | 276-517 | 75-95 | 517-655 | 45-30 | 125-215 | 70-96 |
Hot-Rolled, Annealed | 28-50 | 193-345 | 70-85 | 482-586 | 50-35 | 110-140 | 60-76 |
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