# Nickel Alloy UNS N02200: Properties and Applications
## Introduction to UNS N02200
Nickel Alloy UNS N02200, also known as commercially pure nickel, is a high-purity wrought alloy 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 is characterized by its high nickel content:
– Nickel (Ni): ≥ 99.0%
– Carbon (C): ≤ 0.15%
– Manganese (Mn): ≤ 0.35%
– Iron (Fe): ≤ 0.40%
– Silicon (Si): ≤ 0.35%
– Copper (Cu): ≤ 0.25%
– Sulfur (S): ≤ 0.01%
## Physical Properties
UNS N02200 exhibits several notable physical properties:
– Density: 8.89 g/cm³ (0.321 lb/in³)
– Melting Point: 1435-1446°C (2615-2635°F)
– Electrical Resistivity: 0.096 µΩ·m
– Thermal Conductivity: 70 W/m·K
– Coefficient of Thermal Expansion: 13.3 µm/m·K (20-100°C)
## Mechanical Properties
The mechanical properties of UNS N02200 make it suitable for demanding 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
– Maintains integrity in dry halogen gases at room temperature
– Shows good resistance to caustic alkalis at all concentrations and temperatures
## Applications of UNS N02200
Due to its unique properties, UNS N02200 finds applications in various industries:
### Chemical Processing
Keyword: uns n02200
– Equipment for handling caustic alkalis
– Reactor vessels
– Heat exchangers
– Piping systems
### Food Processing
– Equipment for fatty acid production
– Food handling machinery
– Storage tanks
### Electrical and Electronic
– Battery components
– Electronic tube components
– Spark plug electrodes
### Aerospace
– Rocket engine components
– Turbine blades
– High-temperature fasteners
## Fabrication and Welding
UNS N02200 can be readily fabricated using standard techniques:
– Hot working should be performed between 650-1230°C (1200-2250°F)
– Cold working requires intermediate annealing
– Welding can be performed using gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW)
– Post-weld heat treatment is generally not required
## Conclusion
Nickel Alloy UNS N02200 offers an exceptional combination of corrosion resistance, mechanical properties, and fabricability. Its high purity and versatility make it a preferred material for applications where reliability in harsh environments is critical. From chemical processing to aerospace components, UNS N02200 continues to be a valuable material across multiple industries.
