Alloy 400

UNS N04400 : BS 3076 NA13 : ASTM B164 (VO2.04)
Trade Name Monel 400 (1)

General scope

Alloy 400 a Nickel-Copper alloy with moderate strength and good corrosion resistance in marine environments, hydrofluoric and sulphuric acid and alkalies. Unlike Alloy 500 the alloy is not age hardenable.

Alloy 400 is often used in marine environments for fasteners, piping, propeller shafts and valve & pump components.

Until 2003, this alloy was approved for "general use". However, it is now restricted to special components and restricted well environments.

Chemical composition

C Si Mn P S Cr Ni Mo Cu Fe
Min 63.00 28.00 0.00
Max 0.30 0.50 2.00 0.024 34.00 2.50

Mechanical properties

Condition: Annealed

NACE MR0175 limits the supply hardness to 35 HRC max.
U.T.S 70 KSI Min (480 N/mm2)
0.2% Proof Stress 25 KSI Min (170 N/mm2)
Elongation 35 %
Size range: 1”∅ - 10”∅

Primarily manufactured in:

  • Dubai, UAE
  • Edmonton, Canada
  • Houston, Texas
  • Sheffield, England
  • Singapore