Alloy 400 (UNS: N04400)

Bellows Materials Alloy 400
Trade Name Monel 400
Description A nickel copper alloy which has high strength over a wide temperature range up to 1000 F. It has resistance to a wide variety of corrosive conditions.
Application Notes Monel 400 is most frequently applied in a range of environments going from mildly oxidizing through neutral and to moderately reducing conditions. Additional application area of this material is in marine environments and other non-oxidizing chloride solutions. Like with commercially pure Nickel, Monel® 400 is low in strength in the annealed condition, for this reason a variety of tempers are used to achieve higher strength levels. Monel 400 is one of the few alloys that maintains its strength in sub-zero or cryogenic temperatures, so it is often used in those applications.
Industry Uses /Products Marine Components
chemical equipment
hydrocarbon processing
heat exchangers
flexible metal hose
UNS N04400
Specifications Sheet – ASTM B127, ASME SB127, AMS 4544

Material Properties

Density, ρ, lbs/in^3 0.319
Yield Strength, Sy, Psi 28000
Tensile Strength, Su, Psi 70000
Elongation % 35
Youngs Modulus, E psi 28000000

Post Weld Heat Treatement (PWHT)

Hardening Cannot be hardened by heat treating