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Product Details

Monel 400 ®

Monel 400 is a nickel-copper alloy (about 23% Cu–67% Ni ) that is resistant to sea water and steam at high temperatures as well as to salt and caustic solutions. Alloy 400 is a solid solution alloy that can only be hardened by cold working.

Monel Alloy exhibits characteristics like good weldability, good corrosion resistance and high strength. A low corrosion rate in rapidly flowing brackish or seawater combined with excellent resistance to stress-corrosion cracking in most freshwaters, and its resistance to a variety of corrosive conditions led to its wide use in marine applications and other non-oxidizing chloride solutions. Monel alloy is particularly resistant to hydrofluoric and hydrochloric acids when they are de-aerated. As would be expected from its high copper content, alloy 400 is rapidly attacked by nitric acid and ammonia systems.

Monel 400® is a nickel-copper alloy that is hardened by cold working only. Monel 400® has low corrosion rate in flowing seawater, therefore it is widely used in marine applications. Monel 400® also has excellent resistance to stress corrosion cracking in most freshwaters. Monel 400® can be used in temperatures up to 1000 º F. The alloy has great mechanical properties at subzero temperatures.

M.B.Metal India specializes in available forms are Monel-400 Seamless Pipe, Monel-400 Welded Pipe,Monel-400 Seamless Tube,Monel-400 Welded Tube,Monel-400 Round Bars,Monel-400 Wire,Monel-400 Sheet,Monel-400 Plate, Monel-400 Forgings,Monel-400 Pipe Fittings and Monel-400 Flanges

Chemical Analysis of ALLOY 400 (UNS N04400)

C MN P S Si Ni Cu Fe other
0.3 max 2.0 max 0.02 max 0.024 max 0.5 max 63.0 max 28-34 max 2.5 max


Sheet / Plate ASME SB-127 / AMS 4544
Round Bar ASME SB-164 / QQ-N-281
Pipe ASME SB-165 / ASME SB-829 / ASME SB-775 / ASME SB-725
Tube ASME SB-165 / ASME SB-163 / ASME SB-730 / ASME SB-751
Fittings ASME SB-366
Forgings ASME SB-564

Mechanical Properties – Typical room temperature Tensile Properties of Annealed Material

Product Form Condition Tensile (ksi) .2% Yield (ksi) Elongation (%) Hardness (HRB)
Rod & Bar Annealed 75-90 25-50 60-35 60-80
Rod & Bar Cold-Drawn Stress Relieved 84-120 55-100 40-22 85-20 HRC
Plate Annealed 70-85 28-50 50-35 60-76
Sheet Annealed 70-85 30-45 45-35 65-80
Tube & Pipe Seamless Annealed 70-85 25-45 50-35 75 max *