Monel 400* Specification
*Trade name of Special Metals Group of Companies

  • W.NR 2.4360
  • W.NR 2.4361
  • UNS N04400
  • AWS 040

Applicable Standards:

  • BS 3075 NA 13
  • BS 3076 NA 13
  • DTD 204B
  • ASTM B164
  • QQ-N-281-D
  • NACE MR0175 / ISO 15156-3

A Nickel-Copper alloy with high strength and excellent corrosion resistance in a range of acidic and alkaline environments and especially suitable for reducing conditions. It also has good ductility and thermal conductivity.

Good Mechanical Properties at Elevated Temperatures No
Corrosion Resistant at Ambient Temperatures Yes
Corrosion Resistant & Good Mechanical Properties at Elevated Temperatures No
Oxidation Resistant No
Precipitation Hardenable No

Applications include:

  • Marine Engineering
  • Chemical Processing
  • Hydro-carbon Processing
  • Heat Exchangers
  • Valves
  • Pumps

Approximate Chemical Composition
Ni 63% min
Cu 28 - 34%
Fe 2.5% max
Mn 2% max
Properties
DENSITY 8.8 g/cm3 0.318 lb/in3
MELTING POINT 1350oC 2460oF
COEFFICIENT OF EXPANSION 13.9 µm/m °C
(20 - 100°C)
7.7 x 10-6 in/in °F
(70 - 212°F)
MODULUS OF RIGIDITY 65.3 kN/mm2 9471 ksi
MODULUS OF ELASTICITY 173 kN/mm2 25092 ksi
CONDITION OF SUPPLY HEAT TREATMENT (AFTER FORMING)
Annealed/Spring Temper Stress relieve at 300 - 320oC (570 - 610oF) for 30 - 60 minutes and air cool.
CONDITION APPROX TENSILE STRENGTH APPROX SERVICE TEMPERATURE
Annealed 400 - 600 N/mm2 58 - 87 ksi -200 to +230oC -330 to +445oF
Spring Temper 850 - 1050 N/mm2 123 - 152 ksi -200 to +230oC -330 to +445oF
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