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United Kingdom

Nickel alloy tubes

Alloy 400 • UNS N04400 • WNR 2.436


Alloy 400 (UNS N04400) is a solid-solution alloy that can be hardened only by cold working. It has high strength and toughness over a wide temperature range and excellent resistance to many corrosive environments. Alloy 400 is widely used in many fields, especially marine and chemical processing. Typical applications are valves and pumps; pump and propeller shafts; marine fixtures and fasteners; electrical and electronic components; springs; chemical processing equipment; gasoline and fresh water tanks; crude petroleum stills, process vessels and piping; boiler feedwater heaters and other heat exchangers; and deaerating heaters. Available tube product forms Straight Coiled Seamless Seam welded, cold redrawn and annealed Typical Applications H eat exchangers Steam Generators Reboiler tubes Nuclear core cooling tubes Brine heaters and evaporator bodies in salt plant Sulphuric and hydrofluric acid alkylation plant acids Control lines Typical manufacturing specifications ASTM...

Product features

Tensile Rm 480 MPa (min)
R.p. 0.2% Yield 28 ksi (min)
R.p. 0.2% Yield 195 MPa (min)
Elongation (2" or 4D gl) 40 % (min)
Thermal Conductivity 21.8 W.m -1.°K-1
Thermal Expansion 13.9 mm/m/°C
Modulus Elasticity 173 GPa
Electrical Resistivity 5.47 μohm/cm
Density 8.83 g/cm3

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