Nickel 201 Alloy (UNS N02201)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designation


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.

The following section will discuss in detail about nickel 201 alloy.

Chemical Composition

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

Element 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.

Properties Metric Imperial
Density 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.

Properties Metric Imperial
Tensile strength (annealed) 403 MPa 58500 psi
Yield strength (annealed) 103 MPa 14900 psi
Elongation at break (annealed prior to test) 50% 50%

Thermal Properties

The thermal properties of nickel 201 alloy are given in the following table

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 13.1 µm/m°C 7.28 µin/in°F
Thermal conductivity 79.3 W/mK 550².°F

Other Designation

Other designations that are equivalent to nickel 201 alloy include the following:

  • ASME SB-160 – SB 163
  • SAE AMS 5553
  • DIN 17740
  • DIN 17750 - 17754
  • BS 3072-3076
  • ASTM B 160 - B 163
  • ASTM B 725
  • ASTM B730


The following are the list of applications of nickel 201 alloy:

  • Caustic evaporators
  • Combustion boats
  • Electronic components
  • Plater bars.

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