Nickel 201 (UNS N02201)
Introduction of Nickel 201
Nickel 201 (UNS N02201) is a low-carbon version of commercially pure nickel (Nickel 200). It contains a maximum carbon content of 0.02%, which significantly improves resistance to graphitization and embrittlement at elevated temperatures above 315°C.
It offers excellent resistance to caustic alkalis, neutral and reducing environments, and is widely used in chemical processing, food handling, synthetic fiber production, and electrical industries where high purity nickel and thermal stability are required.
Chemical Composition (%)
| Nickel (Ni) | ≥ 99.0 |
| Carbon (C) | ≤ 0.02 |
| Manganese (Mn) | ≤ 0.35 |
| Silicon (Si) | ≤ 0.35 |
| Iron (Fe) | ≤ 0.40 |
| Copper (Cu) | ≤ 0.25 |
| Sulfur (S) | ≤ 0.01 |
Mechanical Properties
| Tensile Strength | ≥ 462 MPa |
| Yield Strength | ≥ 148 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 100 HRB |
| Condition | Annealed |
Physical Properties
| Density | 8.89 g/cm³ |
| Melting Range | 1440–1450°C |
| Thermal Conductivity | 70 W/m·K |
| Electrical Resistivity | 0.096 μΩ·m |
| Elastic Modulus | 200 GPa |
Product Forms & Standards
| Seamless Pipe | ASTM B161 / B829 |
| Seamless Tube | ASTM B161 / B829 |
| Welded Pipe | From ASTM B162 Plate (Fabricated) |
| Welded Tube | From ASTM B162 Plate (Fabricated) |
| Plate / Sheet | ASTM B162 |
| Bar / Rod | ASTM B160 |
| Forgings | ASTM B564 |
| Fittings | ASTM B366 |
| Flanges | ASTM B564 (Forgings) |
Key Features of Nickel 201
Low Carbon Content
Excellent resistance to embrittlement and graphite formation at elevated temperatures.
Excellent Caustic Resistance
Outstanding performance in alkaline and caustic soda environments.
High Thermal Stability
Suitable for elevated temperature applications with stable mechanical properties.
Good Corrosion Resistance
Performs well in neutral and reducing environments.
Excellent Ductility
Easily formed and fabricated under various processing conditions.
Good Weldability
Compatible with conventional welding techniques and processes.
Typical Applications of Alloy 201
Chemical Processing
Caustic handling systems, evaporators, and reactors.
Food Industry
Equipment requiring high purity and corrosion resistance.
Electronic Components
High conductivity nickel parts and connectors.
Heat Exchangers
Low and medium temperature heat transfer equipment.
Alkali Processing
Caustic soda storage and processing systems.
Fiber Production
Synthetic fiber manufacturing equipment exposed to alkaline media.
Available Nickel 201 Products
Nickel 201 Pipe
Seamless and welded pipe for chemical and alkali service.
Nickel 201 Tube
Heat exchanger and condenser tubing.
Nickel 201 Bar
Round bar, forged bar and machining stock.
Nickel 201 Plate
Sheet and plate for fabrication applications.
Nickel 201 Flanges
Standard and custom flange components.
Nickel 201 Fittings
Elbows, tees, reducers and fabricated parts.
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