# Nickel Alloy N02200 Properties and Applications

## Introduction to Nickel Alloy N02200

Nickel Alloy N02200, also known as UNS N02200 or commercially pure nickel, 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 of N02200

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

– 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 of N02200

Nickel Alloy N02200 exhibits several notable physical properties:

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– Density: 8.89 g/cm³ (0.321 lb/in³)
– Melting Point: 1435-1446°C (2615-2635°F)
– Electrical Resistivity: 6.84 μΩ·cm at 20°C
– Thermal Conductivity: 70 W/m·K at 20°C
– Coefficient of Thermal Expansion: 13.3 μm/m·K (20-100°C)

## Mechanical Properties

The mechanical properties of N02200 make it suitable for demanding applications:

– Tensile Strength: 317-379 MPa (46-55 ksi)
– Yield Strength (0.2% offset): 59-103 MPa (8.5-15 ksi)
– Elongation: 40-50% in 2 inches
– Hardness: 45-70 HRB
– Modulus of Elasticity: 180 GPa (26 x 10⁶ psi)

## Corrosion Resistance

One of the most valuable characteristics of N02200 is its excellent corrosion resistance:

– Resistant to reducing environments
– Performs well in neutral and alkaline salt solutions
– Maintains integrity in dry gases at room temperature
– Excellent resistance to caustic alkalis
– Good performance in food processing 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
– Can be welded using most common methods (TIG, MIG, resistance)
– Post-weld heat treatment is generally not required
– Machining requires sharp tools and positive rake angles

## Heat Treatment

Heat treatment of N02200 is relatively straightforward:

– Annealing is performed at 705-925°C (1300-1700°F)
– Rapid cooling is recommended after annealing
– Stress relieving can be done at 260-425°C (500-800°F)
– No hardening response to heat treatment

## Applications of Nickel Alloy N02200

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

### Chemical Processing

– Caustic handling equipment
– Chlorine production components
– Hydrogen fluoride processing

### Electronics

– Lead frames
– Battery components
– Electronic housings

### Food Processing

– Food handling equipment
– Processing vessels
– Transfer piping

### Other Applications

– Marine engineering components
– Aerospace applications
– Nuclear engineering
– Coinage
– Plating anodes

## Advantages of Using N02200

The primary advantages of Nickel Alloy N02200 include:

– Excellent corrosion resistance in many environments
– Good mechanical properties over a wide temperature range
– High thermal and electrical conductivity
– Good ductility and formability
– Non-magnetic

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