# Nickel 201 UNS N02201: Properties and Applications
## Introduction to Nickel 201
Nickel 201, also known by its UNS designation N02201, is a commercially pure wrought nickel alloy with excellent mechanical properties and corrosion resistance. This material belongs to the family of nickel alloys that offer superior performance in various industrial applications.
## Chemical Composition
The chemical composition of Nickel 201 is carefully controlled to ensure optimal performance:
– Nickel (Ni): ≥ 99.0%
– Iron (Fe): ≤ 0.40%
– Manganese (Mn): ≤ 0.35%
– Silicon (Si): ≤ 0.35%
– Copper (Cu): ≤ 0.25%
– Carbon (C): ≤ 0.02%
– Sulfur (S): ≤ 0.01%
## Physical Properties
Nickel 201 exhibits several notable physical properties:
– Density: 8.89 g/cm³ (0.321 lb/in³)
– Melting Range: 1435-1446°C (2615-2635°F)
– Electrical Resistivity: 9.50 μΩ·cm at 20°C (68°F)
– Thermal Conductivity: 70 W/m·K at 20°C (68°F)
Keyword: Nickel 201 UNS N02201
## Mechanical Properties
The mechanical properties of Nickel 201 make it suitable for demanding applications:
– Tensile Strength: 380-550 MPa (55-80 ksi)
– Yield Strength (0.2% offset): 100-350 MPa (15-51 ksi)
– Elongation: 40-50% in 50 mm (2 in)
– Hardness: 45-90 HRB
## Corrosion Resistance
One of the most significant advantages of Nickel 201 is its excellent corrosion resistance:
– Resistant to reducing chemicals
– Excellent performance in caustic environments
– Good resistance to neutral and alkaline salt solutions
– Maintains integrity in distilled and natural waters
## Applications of Nickel 201
Nickel 201 finds applications in various industries due to its unique combination of properties:
### Chemical Processing
– Equipment for handling caustic soda
– Reactor vessels
– Heat exchangers
– Piping systems
### Electronics Industry
– Lead frames
– Battery components
– Electronic housings
### Food Processing
– Equipment for food production
– Handling and processing machinery
– Storage containers
### Aerospace Industry
– Rocket engine components
– Turbine blades
– High-temperature fasteners
## Fabrication and Welding
Nickel 201 can be readily fabricated using standard techniques:
– Welding: Can be welded using most conventional methods
– Machining: Requires sharp tools and slow speeds
– Forming: Can be cold worked and hot formed
– Heat Treatment: Typically used in annealed condition
## Advantages Over Nickel 200
While similar to Nickel 200, Nickel 201 offers distinct advantages:
– Lower carbon content (≤0.02% vs ≤0.15%)
– Reduced risk of graphitization at elevated temperatures
– Better performance in high-temperature applications
– Improved resistance to intergranular corrosion
## Conclusion
Nickel 201 UNS N02201 is a versatile material that combines excellent corrosion resistance with good mechanical properties. Its purity and performance characteristics make it suitable for demanding applications across multiple industries, particularly where resistance to caustic environments is required. The alloy’s fabricability and weldability further enhance its usefulness in industrial applications.
