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Nickel 201 Alloy (UNS N02201) Introduction

Nickel 201 alloy is a commercially pure wrought alloy having properties similar to that of nickel 200 alloy, but with a lower carbon content to avoid embrittlement by inter-granular carbon at high temperatures.

It is resistant to acids and alkalis, and dry gases at room temperature. It is also resistant to mineral acids depending on the temperature and concentration of the solution.

Chemical Composition

The chemical composition nickel 201 alloy is outlined in the following table.


Content (%)

Nickel, Ni

≥ 99

Iron, Fe

≤ 0.4

Manganese, Mn

≤ 0.35

Silicon, Si

≤ 0.35

Copper, Cu

≤ 0.25

Carbon, C

≤ 0.020

Sulfur, S

≤ 0.010

Physical Properties

The following table shows the physical properties of nickel 201 alloy.





8.89 g/cm3

0.321 lb/in3

Melting point

1435 - 1446°C

2615 - 2635°F

Mechanical Properties

The mechanical properties of nickel 201 alloy are displayed in the following table.




Tensile strength (annealed)

403 MPa

58500 psi

Yield strength (annealed)

103 MPa

14900 psi

Elongation at break (annealed prior to test)



  • Manufacture and handling of sodium hydroxide, particularly at temperature above 300C.
  • Production of viscose rayon. Manufacture of soap.
  • Analine hydrochloride production and in the chlorination of aliphatic hydrocarbons such as benzene, methane and ethane.
  • Manufacture of vinyl chloride monomer.
  • Reactors and vessels in which fluorine is generated and reacted with hydrocarbons.
  • Standard:ASTMA161, DIN17751

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