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Monel 400 UNS N04400

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Chemical Composition:

%NiCuFeCMnSiS
min63.028.0




max
34.02.50.302.000.500.024

Production Type and Standard:

FormASTM
Rod, bar and wireB 164
Plate, sheet and stripB 127, B906
Seamless pipe and tubeB165, B829
Welded pipeB 725, B 775
Welded tubeB 730, B 751
Welding fittingB 366
ForgingB 564

Physical Properties:

Density8.80 g/cm3
Melting range1300-1350 ℃

Features: Monel 400 has excellent resistance to corrosion by many reducing media such as sulfuric and hydrochloric acids. It is generally more resistant to corrosion by oxidizing media than higher copper alloys. Monel 400 resists pitting and stress corrosion cracking in most fresh and industrial waters. It has good resistance in flowing seawater, but under stagnant conditions, pitting and crevice corrosion is induced. Monel 400 is probably the most resistant to hydrofluoric acid in all concentrations up to the boiling point, of all engineering alloys. Monel 400 is notable for its toughness, it does not show embrittlement tendency at cryogenic temperatures. It is work hardenable.

Applications: Chemical process equipment, crude oil stills, gasoline and fresh water tanks, marine engineering equipment, valves, pumps and fasteners.

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