Hastelloy C276 / C22 Sheets & Plates

What are Hastelloy C276 / C22 Sheets & Plates?

Hastelloy C276 (UNS N10276) and Hastelloy C22 (UNS N06022) are nickel-molybdenum-chromium alloys known for their outstanding resistance to a wide range of corrosive environments.

• Hastelloy C276 offers excellent resistance to strong oxidizing and reducing environments.
• Hastelloy C22 provides even higher resistance to pitting, crevice corrosion, and oxidizing media.

Key Functions:

• Provide superior corrosion resistance in harsh environments
• Resist chemical attack in acidic and oxidizing conditions
• Ensure long-term durability and performance
• Operate effectively in extreme industrial processes

Chemical Composition of Hastelloy C276 / C22

Hastelloy C276 (UNS N10276):

• Nickel (Ni): Balance
• Chromium (Cr): 14.5% – 16.5%
• Molybdenum (Mo): 15% – 17%
• Iron (Fe): 4% – 7%
• Tungsten (W): 3% – 4.5%

Hastelloy C22 (UNS N06022):

• Nickel (Ni): Balance
• Chromium (Cr): 20% – 22.5%
• Molybdenum (Mo): 12.5% – 14.5%
• Iron (Fe): 2% – 6%
• Tungsten (W): 2.5% – 3.5%

The higher chromium content in C22 improves resistance to oxidizing environments.

Key Features of Hastelloy C276 / C22 Sheets & Plates

• Exceptional resistance to a wide range of corrosive environments
• Excellent resistance to pitting and crevice corrosion
• Superior resistance to stress corrosion cracking
• High resistance to oxidizing and reducing chemicals
• Excellent weldability and fabrication
• High durability and long service life
• Suitable for extreme chemical processing environments

Mechanical Properties

Hastelloy C276:

• Tensile Strength: ~690–790 MPa
• Yield Strength: ~283 MPa
• Elongation: ~40%

Hastelloy C22:

• Tensile Strength: ~690–800 MPa
• Yield Strength: ~310 MPa
• Elongation: ~45%

Physical Properties

• Density: ~8.6–8.7 g/cm³
• Melting Range: ~1325–1370°C
• Modulus of Elasticity: ~205 GPa
• Thermal Conductivity: ~10–12 W/m•K
• Thermal Expansion: Moderate

Corrosion Resistance

Hastelloy C276 / C22 sheets and plates provide excellent resistance to:

• Strong acids (sulfuric, hydrochloric, nitric)
• Chloride-induced pitting and crevice corrosion
• Oxidizing and reducing environments
• Wet chlorine gas and hypochlorite solutions
• Industrial chemical processes

C22 offers superior resistance in oxidizing environments compared to C276.

Heat Treatment

Supplied in solution-annealed condition.

Process:

• Solution Annealing: ~1120–1175°C
• Rapid cooling

This ensures maximum corrosion resistance and ductility.

Weldability

Both C276 and C22 offer excellent weldability.

Welding Methods:

• TIG (GTAW)
• MIG (GMAW)
• SMAW

Best Practices:

• Use matching filler materials
• Maintain clean surfaces
• Control heat input
• Avoid contamination

Machinability

Both C276 and C22 offer excellent weldability.

Welding Methods:

• Moderate machining difficulty
• Requires rigid tooling and setup
• Use sharp carbide tools
• Maintain low cutting speeds and proper coolant

Standards & Specifications

• ASTM B575 / ASTM B574
• ASTM B622
• UNS N10276 / N06022
• ASTM B906

Available Types of Sheets & Plates

• Hot Rolled Plates
• Cold Rolled Sheets
• Polished Sheets
• Perforated Sheets
• Custom Cut Sizes

Sizes & Specifications

• Thickness: 0.5 mm to 100 mm
• Width: Up to 2000 mm
• Length: Up to 6000 mm or as required

Surface Finish Options:

• 2B Finish
• No.1 Finish
• Mirror Finish
• Matte Finish

Applications of Hastelloy C276 / C22 Sheets & Plates

• Chemical Processing Industry – Reactors, heat exchangers
• Pharmaceutical Industry – Corrosion-resistant equipment
• Pollution Control – Scrubbers and gas cleaning systems
• Oil & Gas Industry – Corrosive environments
• Pulp & Paper Industry – Bleaching plants
• Marine Industry – Seawater and harsh conditions

Quality Testing & Inspection

• Chemical composition testing
• Mechanical testing
• Ultrasonic testing
• Surface inspection
• Positive Material Identification (PMI)

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

Packaging & Delivery

• Export-grade wooden packaging
• PVC protective coating
• Proper labeling and traceability
• Safe and timely global delivery

Why Choose Virami Steel Hub?

• Trusted Hastelloy supplier in Mumbai
• Extensive stock availability
• Competitive pricing
• Custom sizes and specifications
• Compliance with international standards
• Strong export network
• Dedicated customer support

Conclusion

Hastelloy C276 / C22 Sheets & Plates are the ideal choice for applications requiring exceptional corrosion resistance in highly aggressive environments. While C276 performs well in both oxidizing and reducing conditions, C22 offers enhanced resistance in oxidizing media.

Virami Steel Hub delivers premium-quality Hastelloy products that ensure durability, reliability, and long-term performance.