# Nickel Alloy UNS N02200: Properties and Applications
## Introduction to UNS N02200
Nickel Alloy UNS N02200, also known as commercially pure nickel or Nickel 200, is a wrought material with excellent mechanical properties and corrosion resistance. This alloy is widely used in various industries due to its unique combination of characteristics.
## Chemical Composition
The chemical composition of UNS N02200 includes:
– Nickel (Ni): 99.0% minimum
– Carbon (C): 0.15% maximum
– Manganese (Mn): 0.35% maximum
– Iron (Fe): 0.40% maximum
– Silicon (Si): 0.35% maximum
– Copper (Cu): 0.25% maximum
– Sulfur (S): 0.01% maximum
## Physical Properties
UNS N02200 exhibits several notable physical properties:
– Density: 8.89 g/cm³
– Melting Point: 1435-1446°C (2615-2635°F)
– Electrical Resistivity: 0.086 μΩ·m
– Thermal Conductivity: 70 W/m·K
– Coefficient of Thermal Expansion: 13.3 μm/m·°C (20-100°C)
## Mechanical Properties
The mechanical properties of Nickel 200 make it suitable for various applications:
– Tensile Strength: 380-550 MPa (55-80 ksi)
– Yield Strength: 100-350 MPa (15-51 ksi)
– Elongation: 40-50%
– Hardness: 45-90 HRB
## Corrosion Resistance
One of the most significant advantages of UNS N02200 is its excellent corrosion resistance:
– Resistant to reducing environments
– Performs well in neutral and alkaline salt solutions
– Excellent resistance to caustic alkalis
– Good resistance to mineral and organic acids
– Performs poorly in oxidizing environments
## Applications of UNS N02200
Nickel Alloy 200 finds applications in numerous industries:
### Chemical Processing
– Equipment for handling caustic soda
– Reaction vessels
– Heat exchangers
– Piping systems
### Food Processing
– Equipment for fatty acid production
– Food handling machinery
– Storage tanks
### Electronics
– Electronic components
– Battery components
– Lead frames
### Other Applications
– Marine engineering
– Aerospace components
– Nuclear reactors
– Desalination plants
## Fabrication and Welding
UNS N02200 can be easily fabricated using standard techniques:
– Hot working should be performed between 650-1230°C (1200-2250°F)
– Cold working can be done with standard equipment
– Annealing is recommended at 705-925°C (1300-1700°F)
– Welding can be performed using GTAW, GMAW, and SMAW methods
## Heat Treatment
Nickel 200 can be heat treated to achieve specific properties:
– Stress relieving: 425-650°C (800-1200°F)
– Annealing: 705-925°C (1300-1700°F)
– Rapid cooling from annealing temperature is recommended
## Conclusion
Keyword: uns n02200
Nickel Alloy UNS N02200 offers an excellent combination of corrosion resistance, mechanical properties, and fabricability. Its purity and performance in various environments make it a valuable material for critical applications across multiple industries. When selecting materials for corrosive environments, especially those involving caustic solutions, UNS N02200 should be strongly considered.