Nickel Alloy 400/ Monel 400

Technical Data Sheet

Chemical Composition Limits
Weight % C S Ni+Co Fe Mn Si Cu
Nickel 400 0.30 max 0.024 max 63.0 max 2.50 max 2.0 max 0.50 max 28-34

Alloy 400 (UNS N04400) is a nickel-copper alloy with high strength (comparable to structural steel) and toughness. Alloy 400 also has excellent corrosion resistance in a range of media including seawater, hydrofluoric acid, sulphuric acid and alkalis. Used for marine engineering, chemical, hydrocarbon processing equipment, and heat exchangers.

Typical Mechanical Properties

Material Form and Condition Tensile Strength MPa Yield Strength (0.2% Offset) MPa Elongation (%) Hardness Rockwell B
Alloy 400 Annealed Rod and Bar 517-620 172-345 60-35 60-80
Alloy 400 Hot Rolled Plate Annealed 482-586 193-345 50-35 60-76
Alloy 400 Sheet Annealed 482-586 207-310 45-35 65-80
Alloy 400 Tube Cold drawn Annealed Seamless 482-586 172-310 50-35 75 max

Alloy 400 (UNS N04400) is available in Bar (Round), Tube, Flat Bar, Wire, Billet, Sheet, Plate, Pipe, Forgings. View Stock List, Plate Stock List or contact Sales for further availability.


Bar ASTM B 164, QQ N 281, DIN 17752, AMS 4675
Sheet ASTM B 127, QQ N 281, BS3072NA13, AMS 4544, DIN 17750
Plate ASTM B 127, QQN 281, BS3072NA13, AMS 4544, DIN 17750
Strip BS3073NA13, ASTM B127, AMS 4544, DIN 17750
Pipe ASTM B 185
Tube ASTM B165, AMS 4574, AMS 4575
Forging ASTM B564, DIN 17752, AMS 4675
Other W.Nr 2.4360, UNS N04400, NACE MR-01-75, Wire AMS 4730 Monel 400 (tradename), ISO 15156

At Aircraft Materials we specialise in the rapid turn-around of orders, with most stock items ready for shipping out the same day to anywhere in the world. For time-critical orders, such as AOGs use our AOG service desk (, the team are dedicated to processing and dispatching orders on the same day, even for cutting orders on bar and sheet products.

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Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.