400

Alloy 400 is a ductile nickel-copper alloy with resistance to a wide range of corrosive environments. This grade is often chosen to handle sulfuric acid through 80% concentration at room temperature, and about 15% H2SO2 boiling. Alloy 400 possesses useful resistance to aerated hydrochloric acid up to 10% concentration at room temperature. The alloy has excellent resistance to sea or brackish water under high-velocity conditions. Alloy 400 is one of the few materials with good resistance to hydrofluoric acid.

Chemistry

 NiMnCuSiCSFe
MIN 63.0 -- 28.0 -- -- -- --
MAX 70.0 2.0 34.0 0.5 0.3 0.024 2.5

Specifications

ASME SB 366ASME SB 725
ASME SB-127
ASME SB-164
ASME SB-165
ASTM B 127ASTM B 164
ASTM B 165
ASTM B 366ASTM B 725
ISO 15156-3
NACE MR0175UNS N06022

Inventory

400 Pipe, 400 Plate, 400 Sheet, 400 Weld Wire

Common Trade Names

Monel 400, Alloy 400

Features

  • Resistant to a variety of corrosive environments
  • Freedom from chloride stress corrosion cracking
  • Good strength and toughness over a wide temperature range
  • Useful resistance to dry chlorine, fluorine hydrogen chloride and hydrogen fluoride gases

Applications

  • Crude oil distillation towers
  • Marine components
  • Valve and pump components
  • Chemical processing equipment
  • Caustic evaporators
  • Oil and gas applications
  • Hydroflouric acid production
  • Salt production equipment

Physical Properties

Density: 0.294 lb/in3
Melting Range: 2370 - 2460°F

Temperature, °F 70 200 400 600 800 1000 1200
Coefficient* of Thermal Expansion, in/in°F x 10-6 -- 7.7 8.6 8.8 8.9 9.1 9.3
Thermal Conductivity
Btu • ft/ft2 • hr • °F
12.6 13.9 16.1 17.9 19.8 22.0 23.9
Modulus of Elasticity Dynamic,,
psi x 106
26.0 26.0 25.6 24.7 21.0 16.0 13.0

* 70°F to indicated temperature.

Mechanical Properties

Minimum Specified Properties, ASME B 168

Ultimate tensile strength, ksi 70
0.2% yield strength, ksi 28
Elongation, % 35
Hardness MAX, Brinell 110
Temperature, °F 212 392 572 725 932 1112
Ultimate Tensile Strength, ksi 68.2 65.3 64.5 60.2 48.6 37.6
0.2% Yield Strength, ksi 26.1 24.7 24.1 22.0 16.4 15.8