# Nickel Alloy N02200: Properties and Applications

## Introduction to Nickel Alloy N02200

Nickel Alloy N02200, also known as UNS N02200, is a commercially pure wrought nickel that offers excellent mechanical properties and corrosion resistance. This alloy is part of the 200 series of nickel alloys and is widely used in various industries due to its unique combination of characteristics.

## Chemical Composition

The chemical composition of Nickel Alloy N02200 is primarily nickel, with small amounts of other elements:

– Nickel (Ni): 99.0% min
– Carbon (C): 0.15% max
– Manganese (Mn): 0.35% max
– Iron (Fe): 0.40% max
– Silicon (Si): 0.35% max
– Copper (Cu): 0.25% max
– Sulfur (S): 0.01% max

## Physical Properties

Nickel Alloy 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 N02200 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: 80-120 HB

## Corrosion Resistance

One of the most significant advantages of Nickel Alloy N02200 is its excellent corrosion resistance:

– Resistant to corrosion by neutral and alkaline salts
– Performs well in reducing environments
– Maintains resistance to corrosion at high temperatures
– Resistant to caustic alkalis and various organic compounds

## Applications of Nickel Alloy N02200

Due to its unique properties, N02200 finds applications in numerous industries:

### Chemical Processing

– Equipment for handling caustic alkalis
– Reactors and vessels for organic chemical production
– Piping systems for corrosive media

### Food Processing

– Equipment for food handling and processing
– Components exposed to fatty acids
– Brewery and dairy processing equipment

### Electrical and Electronic

– Battery components
– Electronic tube components
– Resistance wires

### Other Applications

– Marine engineering components
– Aerospace applications
– Heat exchangers in corrosive environments

## Fabrication and Welding

Nickel Alloy 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

## Advantages Over Other Materials

Compared to other nickel alloys and stainless steels, N02200 offers several advantages:

– Higher thermal and electrical conductivity than most nickel alloys
– Better corrosion resistance in certain environments than stainless steels
– Excellent ductility and formability
– Good high-temperature strength

## Conclusion

Nickel Alloy N02200 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 various industries. When selecting materials for corrosive environments or specialized applications, N02200 should be considered as a reliable and high-performance option.