Nickel 200 (UNS N02200)
Introduction of Nickel 200
Nickel 200 (UNS N02200) is commercially pure nickel (99.6% Ni minimum) with excellent corrosion resistance in neutral to mildly reducing environments. It is widely used in chemical processing, food handling, and caustic alkali service due to its excellent resistance to caustic soda and good thermal and electrical conductivity.
Compared with nickel alloys containing chromium or molybdenum, Alloy 200 provides outstanding resistance to caustic alkalis while maintaining good ductility, weldability, and fabrication characteristics. It is not recommended for strongly oxidizing environments.
Chemical Composition (%)
| Nickel (Ni) | ≥ 99.0 |
| Carbon (C) | ≤ 0.15 |
| 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 | ≥ 45% |
| Hardness | ≤ 100 HRB |
| Condition | Annealed |
Physical Properties
| Density | 8.89 g/cm³ |
| Melting Range | 1440–1500°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 200
Excellent Caustic Resistance
Outstanding performance in caustic soda and alkaline environments.
High Thermal Conductivity
Efficient heat transfer performance in thermal applications.
Good Corrosion Resistance
Strong resistance in neutral and reducing environments.
Excellent Ductility
Easy forming and fabrication under cold and hot working conditions.
Good Weldability
Can be welded using conventional processes with proper precautions.
High Purity Nickel Base
Provides stable performance with minimal alloying additions.
Typical Applications of Nickel 200
Chemical Processing
Caustic soda handling, reactors, and evaporators.
Food Industry
Food processing equipment requiring high purity materials.
Salt Production
Evaporation and crystallization equipment.
Electronics Industry
Components requiring high electrical conductivity nickel.
Heat Exchangers
Low to moderate temperature heat transfer systems.
Alkali Processing
Caustic storage tanks and process piping systems.
Available Alloy 200 Products
Alloy 200 Pipe
Seamless and welded pipe for chemical and alkali service.
Alloy 200 Tube
Heat exchanger and condenser tubing.
Alloy 200 Bar
Round bar, forged bar and machining stock.
Alloy 200 Plate
Sheet and plate for fabrication applications.
Alloy 200 Flanges
Standard and custom flange solutions.
Alloy 200 Fittings
Elbows, tees, reducers and custom components.
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