Alloy 200 (UNS N02200)


Nickel 200 is a wrought commercially pure nickel product.  The alloy provides highly ductile mechanical properties across a wide temperature range and good corrosion resistance in neutral to moderately reducing environments. In the annealed condition, the alloy possesses the approximate strength of mild steel.

The nickel alloys are readily fabricated by standard fabrication practices. The materials are covered by a variety of specifications and are assigned maximum allowable stresses in the ASME Boiler and Pressure Vessel Code.  Nickel 200 is ferromagnetic and provides high thermal and electrical conductivity in comparison to nickel base alloys, stainless and low alloy steels.

Because long term exposures of Nickel 200 in the 800 to 1200°F range can result in precipitation of a carbon containing phase and loss of ductility, the alloy is not recommended for service above 600°F.

Chemical Composition

Chemical Composition (wt%) limits as specified in ASTM B160*

Carbon 0.10 Manganese 0.50
Nickel 20.00-23.00 Silicon 0.015
Iron 58.00 min Sulfur 0.015

*Maximum, unless range is indicated

Physical Properties

Physical properties for Nickel 200

Density, lb/in3 0.322
Modulus of Elasticity, psi 30.0 x 106
Coefficient of Thermal Expansion, 68-212˚F, /˚F 7.4 x 10-6
Thermal Conductivity, Btu/ft hr ˚F 38.8
Specific Heat, Btu/lb ˚F 0.106
Electrical Resistivity, Microhm-in 21.6

Mechanical Properties

Mechanical property requirements for annealed bar product as specified in ASTM B160

Yield Strength, min. (ksi) 15
Tensile Strength, min. (ksi) 55
Elongation, min. (%) 40


Typical standards for Nickel 200