Alloy Steel A182 F11 / F22 / F91 Angles & Flats

What are Alloy Steel A182 F11 / F22 / F91 Angles & Flats?

Alloy Steel A182 grades are chromium-molybdenum steels designed for high-temperature and high-pressure applications.

• F11: Chromium-molybdenum alloy with good strength and heat resistance
• F22: Higher chromium content for improved corrosion and oxidation resistance
• F91: Advanced alloy with superior high-temperature strength and creep resistance

Angles and flats are structural components used in heavy-duty industrial and engineering applications.

Key Functions:

• Provide high strength at elevated temperatures
• Resist pressure and thermal stress
• Ensure durability in power and petrochemical industries
• Support critical structural applications

Chemical Composition of Alloy Steel A182 F11 / F22 / F91

Typical Composition:

F11:

• Chromium (Cr): 1.0% – 1.5%
• Molybdenum (Mo): 0.44% – 0.65%

F22:

• Chromium (Cr): 2.0% – 2.5%
• Molybdenum (Mo): 0.87% – 1.13%

F91:

• Chromium (Cr): 8.0% – 9.5%
• Molybdenum (Mo): 0.85% – 1.05%
• Vanadium (V): 0.18% – 0.25%

Key Features of Alloy Steel A182 F11 / F22 / F91 Angles & Flats

• Excellent high-temperature strength
• Superior resistance to creep and thermal fatigue
• Good corrosion and oxidation resistance
• High pressure-handling capability
• Durable in extreme environments
• Long service life

Mechanical Properties

• Tensile Strength: ~415–620 MPa (varies by grade)
• Yield Strength: ~205–415 MPa
• Elongation: ~20%
• Hardness: Moderate to high

Physical Properties

• Density: ~7.8 g/cm³
• Melting Range: ~1400–1500°C
• Modulus of Elasticity: ~200 GPa
• Thermal Conductivity: Moderate
• Thermal Expansion: Moderate

Corrosion Resistance

Alloy Steel A182 F11 / F22 / F91 provides good resistance to:

• Oxidation at elevated temperatures
• High-pressure steam environments
• Chemical and petrochemical exposure
• Thermal fatigue and creep

F91 offers the highest resistance among these grades.

Heat Treatment

These alloys are heat-treated to achieve optimal properties.

Typical Process:

• Normalizing
• Tempering
• Stress relieving

Weldability

Good weldability with proper procedures.

Welding Methods:

• SMAW
• TIG (GTAW)
• MIG (GMAW)

Best Practices:

• Preheating required
• Post-weld heat treatment (PWHT) recommended
• Controlled heat input

Machinability

• Moderate machinability
• Requires rigid tooling
• Use appropriate cutting speeds and lubrication

Standards & Specifications

• ASTM A182 F11 / F22 / F91
• ASME SA182
• ASTM A336 (reference)

Available Types of Angles & Flats

We offer:

• Equal Angles
• Unequal Angles
• Flat Bars
• Forged Sections
• Custom Fabricated Profiles

Sizes & Specifications

• Thickness: 5 mm to 150 mm
• Width: Up to 300 mm (flats)
• Length: Up to 6000 mm or as required

Surface Finish Options:

• Black Finish
• Machined Finish
• Coated / Painted

Applications of Alloy Steel A182 F11 / F22 / F91 Angles & Flats

• Power Plants : Boilers and high-temperature systems
• Oil & Gas Industry : Pressure systems
• Petrochemical Industry : Processing units
• Thermal Power Plants : Steam pipelines
• Heavy Engineering : Structural applications

Quality Testing & Inspection

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

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

Packaging & Delivery

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

Why Choose Virami Steel Hub?

• Trusted Alloy Steel supplier in Mumbai
• Ready stock and fast delivery
• Competitive pricing
• Custom sizes available
• International quality standards
• Strong export network
• Dedicated customer support

Conclusion

Alloy Steel A182 F11 / F22 / F91 Angles & Flats are ideal for applications requiring high strength, heat resistance, and reliability under extreme conditions. Their superior performance makes them essential in power, petrochemical, and heavy engineering industries.

Virami Steel Hub delivers premium-quality alloy steel products that ensure durability, efficiency, and long-term value.