Hastelloy C276 / C22 Pipe Fittings

What are Hastelloy C276 / C22 Pipe Fittings?

Hastelloy C276 and C22 Pipe Fittings are corrosion-resistant piping components used to:

• Connect pipelines
• Change flow direction
• Branch piping systems
• Control fluid flow

These fittings are made from Hastelloy alloys, which are nickel-molybdenum-chromium-based materials known for their outstanding resistance to chemical corrosion and oxidizing environments.

Composition Highlights (Typical):

Hastelloy C276:

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

Hastelloy C22:

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

Key Features of Hastelloy C276 / C22 Pipe Fittings

• Exceptional resistance to corrosion and oxidation
• Superior resistance to pitting and crevice corrosion
• Excellent performance in acidic and chloride environments
• High strength and durability
• Resistance to stress corrosion cracking
• Good weldability and fabrication properties
• Long service life in harsh chemical conditions
• Excellent performance at elevated temperatures

Mechanical Properties

Hastelloy C276:

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

Hastelloy C22:

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

Physical Properties

• Density: ~8.69 g/cm³ (C276), ~8.69 g/cm³ (C22)
• Melting Range: 1325 – 1370°C
• Modulus of Elasticity: ~205 GPa
• Thermal Conductivity: ~10 W/m·K
• Coefficient of Expansion: ~12.4 µm/m°C

Corrosion Resistance

Hastelloy C276 and C22 pipe fittings offer outstanding resistance to:

• Strong acids (sulfuric, hydrochloric, nitric)
• Chloride-induced corrosion
• Pitting and crevice corrosion
• Oxidizing and reducing environments
• Industrial chemicals and solvents

These alloys are among the most corrosion-resistant materials available, making them ideal for critical applications.

Heat Treatment

• Solution Annealing:1040 – 1150°C
• Rapid cooling (water quenching)

This process enhances corrosion resistance and maintains ductility.

Weldability

Hastelloy alloys are highly weldable using:

• TIG (GTAW)
• MIG (GMAW)
• SMAW

Recommendations:

• Use matching filler metals
• Maintain low heat input
• Ensure clean welding environment

Machinability

Hastelloy alloys have moderate machinability:

• Use carbide or coated tools
• Maintain low cutting speeds
• Apply adequate coolant
• Avoid work hardening

Standards & Specifications

• ASTM B366
• ASME SB366
• ANSI B16.9
• ASTM B574
• ASTM B575

Available Types of Hastelloy Pipe Fittings

• Elbows (45° and 90°)
• Tees (Equal and Reducing)
• Reducers (Concentric and Eccentric)
• Pipe Caps
• Stub Ends
• Cross Fittings
• Couplings

Sizes & Specifications

• Size Range: ½ inch to 48 inches
• Thickness: SCH 10, SCH 20, SCH 40, SCH 80, SCH 160
• Types: Seamless and Welded

Surface Finish:

• Pickled
• Polished
• Matte

(Custom sizes available as per requirement)

Applications of Hastelloy C276 / C22 Pipe Fittings

Chemical Processing Industry

• Acid handling systems
• Chemical reactors

Oil & Gas Industry

• Offshore pipelines
• Sour gas applications

Pharmaceutical Industry

• Clean and corrosion-resistant piping

Power Generation

• Flue gas desulfurization systems

Marine Industry

• Seawater handling systems

Quality Testing & Inspection

All fittings undergo strict quality checks:

• Chemical composition analysis
• Mechanical testing
• Dimensional inspection
• Surface examination
• PMI testing

We provide Mill Test Certificates (MTC) and third-party inspection.

Packaging & Delivery

• Export-quality wooden packaging
• Protective wrapping
• Proper labeling and traceability
• Safe global shipping

Why Choose Virami Steel Hub?

• Trusted Hastelloy pipe fittings manufacturer in Mumbai
• Large stock availability
• Competitive pricing
• Custom manufacturing solutions
• Compliance with international standards
• Global export expertise
• Dedicated customer support

Conclusion

Hastelloy C276 / C22 Pipe Fittings are widely used in industries requiring exceptional resistance to corrosion, chemicals, and extreme environments. Their superior performance makes them ideal for chemical processing, oil & gas, marine, and power generation sectors.

Virami Steel Hub offers high-quality Hastelloy pipe fittings that meet global standards, ensuring durability, reliability, and long-term performance.