Back To Alloys
UNS - N02201

Alloy 201 is a wrought economically pure nickel with a maximum carbon level of 0.02%. This gives exceedingly ductile mechanical properties over a wide temperature range. It gives corrosion resistance in neutral to moderately decreasing situations.

Nickel 201 is ferromagnetic. It gives high thermal and electrical conductivity in contrast with nickel-base alloys, stainless steels and low alloy. As a result of its low carbon content (.02% max.) Nickel 201 might be considered for process above 600°F (316°C), where alloy 200 with higher carbon content is not recommended.

  • Good resistance to corrosion in acids and alkalis and is most useful under reducing conditions.
  • Outstanding resistance to caustic alkalis up to and including the molten state.
  • In acid, alkaline and neutral salt solutions the material shows good resistance, but in oxidising salt solutions severe attack will occur.
  • Resistant to all dry gases at room temperature and in dry chlorine and hydrogen chloride may be used in temperatures up to 550C.
  • Resistance to mineral acids varies according to temperature and concentration and whether the solution is aerated or not. Corrosion resistance is better in de-aerated acid.
  • Virtually immune to inter granular attack above 315C, chlorates must be kept to a minimum.

  • Food Processing
  • Synthetic Fibre Processing
  • Heat Exchangers
  • Chemical Industries
  • Electrical Industries


Economically pure nickel is soft and "gummy" to machine yet it can be promptly machined by standard mean. In any case it can be machined with standard tooling same as Nickel 200. High speed steel tools are recommended.


Nickel 201 is promptly shaped by the majority of the standard means. It is specifically suited for forming parts by spinning.


Weldable by standard means as was additionally the case with Nickel 200. However oxyacetylene welding ought not to be utilized with Nickel 201.

Heat Treatment

Anneal at 1650 F to 1300 F relying upon the degree of cold working and time at temperature.


Forging should be done within the scope of 2100 F to 1200 F.

Hot Working

Hot working may be done within the scope of 2100 F to 1200 F.

Cold Working

Cold working is promptly accomplished with standard tooling.


Anneal at 1650 F to 1300 F depending upon time at temperature and amount of cold working that has been done.


Hardens are just done by cold working.

Chemical Composition %

0.02 max0.35 max0.01 max0.35 max0.4 max99.0 min0.25 max

Mechanical Properties

Tensile Strength (ksi)0.2% Yield Strength (ksi)Elongation% in 2 inches

Physical Properties

UnitsTemperature in °C
Density8.9 g/cm³Room
Specific Heat0.105 Kcal/kg.CRoom
Melting Range1435-1445 °C-
Modulus of Elasticity 207 KN/mm²Room
Electrical Resistivity8.5 µΩ.cm20°
Coefficient of Expansion13.3 µm/m °C20 - 100°
Thermal Conductivity67.1 W/m -°K20°

ASTM Specifications

Pipe / Tube (SMLS)Tube Welded Pipe Welded Sheet / PlateBar Fitting
B 161B 622B 622B 162B 160B 163


Custom Machining
Custom Fabrication
Piping / Spools
Stamped Parts
B/W Fittings
S/W Fittings
Compression Fittings
Raw Materials
Pipes & Tubes
Sheets / Plates
Get To Quote
Please Contact Us