Nickel Alloy Sterlite 21 Casting

What is Nickel Alloy Sterlite 21 Casting?

Nickel Alloy Sterlite 21 is a high-performance nickel-based alloy casting material designed for corrosion resistance and wear resistance in harsh environments. It is widely used in applications where components are exposed to chemicals, high temperatures, and abrasive conditions.

Castings are produced by pouring molten alloy into molds to create complex shapes required in industrial applications.

Key Functions:

• Provide excellent corrosion resistance
• Offer high strength at elevated temperatures
• Resist wear and abrasion
• Ensure long service life in harsh environments

Chemical Composition of Nickel Alloy Sterlite 21

Typical Composition:

• Nickel (Ni): Balance
• Chromium (Cr): 25% – 29%
• Molybdenum (Mo): 4% – 6%
• Iron (Fe): ≤ 5%
• Carbon (C): ≤ 0.1%

This composition provides excellent resistance to oxidation, corrosion, and chemical attack.

Key Features of Nickel Alloy Sterlite 21 Castings

• Outstanding corrosion and oxidation resistance
• High strength at elevated temperatures
• Excellent wear and abrasion resistance
• Good mechanical stability
• Long service life in aggressive environments
• Suitable for complex casting shapes
• Reliable performance in industrial applications

Mechanical Properties

• Tensile Strength: ~550 – 750 MPa
• Yield Strength: ~240 – 400 MPa
• Elongation: ~20 – 35%
• Hardness: Moderate to high

Physical Properties

• Density: ~8.2 – 8.6 g/cm³
• Melting Range: ~1300 – 1400°C
• Modulus of Elasticity: ~200 GPa
• Thermal Conductivity: Moderate
• Electrical Conductivity: Low

Corrosion Resistance

Nickel Alloy Sterlite 21 offers excellent resistance to:

• Chemical environments (acids and alkalis)
• Oxidation at high temperatures
• Industrial and process fluids
• Corrosive gases

Suitable for highly aggressive environments, including chemical processing industries.

Heat Treatment

Sterlite 21 can be heat treated to enhance properties.

Typical Process:

• Solution annealing
• Controlled cooling

This improves strength, toughness, and corrosion resistance.

Weldability

Good weldability compared to many nickel alloys.

Suitable methods include:

• TIG Welding
• MIG Welding
• Shielded Metal Arc Welding

Proper filler materials are recommended for best results.

Machinability

• Moderate machinability
• Requires proper tooling due to alloy hardness
• Suitable for precision machining with controlled speeds

Standards & Specifications

• ASTM A494
• ASTM A351
• Equivalent international casting standards

Available Types of Castings

• Pump Components
• Valve Bodies
• Impellers
• Industrial Fittings
• Custom Precision Castings

Sizes & Specifications

• Custom sizes as per drawings and requirements
• Complex shapes and geometries available

Surface Finish Options:

• As-cast finish
• Machined finish
• Polished finish

Applications of Nickel Alloy Sterlite 21 Castings

• Chemical Processing Industry: Used in handling chemicals and process fluids.
• Oil & Gas Industry: Used in offshore and demanding industrial environments.
• Marine and Offshore Applications: Ideal for corrosive marine conditions.
• Power Generation: Used in high-temperature components.
• Pump and Valve Manufacturing: Used for bodies, impellers, and internal components.

Quality Testing & Inspection

• Chemical composition testing
• Mechanical testing
• Non-destructive testing (NDT)
• Dimensional inspection
• Surface quality checks

Mill Test Certificates (MTC) and third-party inspection reports are provided.

Packaging & Delivery

• Export-grade packaging
• Protective wrapping
• Secure handling and labeling
• Timely global delivery

Why Choose Virami Steel Hub?

• Trusted nickel alloy casting supplier in Mumbai
• High-quality precision castings
• Competitive pricing
• Custom manufacturing capabilities
• International quality compliance
• Strong export network
• Dedicated customer support

Conclusion

Nickel Alloy Sterlite 21 Castings are an excellent choice for industries requiring high corrosion resistance, strength, and durability in extreme conditions. Their superior performance makes them ideal for critical industrial applications.

Virami Steel Hub ensures premium-quality castings that deliver reliability, efficiency, and long-term value.