Alloy Steel Welded Flanges
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Flange Materials
Alloy Steel Welded Flanges
Built for high-temperature, high-pressure flange connections
Alloy Steel Flanges are made by adding chromium and molybdenum to carbon steel, giving them improved strength, hardness and resistance to heat and creep. This makes them the preferred choice for flange connections in boiler lines, refinery units and power plant piping operating at elevated temperature and pressure.
Royal Steel India manufactures Alloy Steel Flanges in F5, F9, F11, F22 and F91 grades, tested and certified for critical high-temperature service.
Key Features
- Excellent strength at elevated temperatures
- High resistance to creep and thermal fatigue
- Good weldability with matching alloy filler
- Withstands high-pressure steam and hydrocarbon service
- Available in forged construction to ASME B16.5
- Suitable for cyclic loading conditions
Standards Followed
- ASME B16.5
- ASME B16.47
- ANSI
- DIN
- EN 1092-1
- BS
- JIS
Applications
Industries and sectors that rely on our Alloy Steel Welded Flanges.
- Oil & Gas Industry
- Petrochemical Plants
- Chemical Processing
- Power Plants
- Marine & Offshore
- Water Treatment Plants
- Food & Beverage Industry
- Pharmaceutical Industry
- Paper & Pulp Industry
- Construction Projects
Why Choose Royal Steel India?
Royal Steel India manufactures and supplies Alloy Steel Welded Flanges that are precision-engineered, rigorously tested, and backed by mill test certificates for full traceability. Every batch is manufactured to meet international quality standards and the specific requirements of your project.
Whether you need standard sizes or custom specifications, we offer competitive pricing, reliable stock availability, and timely delivery for domestic and export orders.
Frequently Asked Questions
Where are Alloy Steel Flanges used?
They are used in high-temperature and high-pressure piping such as boiler feed lines, refinery process units, power generation plants and petrochemical piping.
Which grades of Alloy Steel Flanges do you supply?
We supply ASTM A182 F5, F9, F11, F22 and F91 grade alloy steel flanges in all standard types and pressure classes.
Why choose alloy steel over carbon steel for high-temperature flanges?
Alloy steel retains its strength and resists creep at temperatures where plain carbon steel would soften and fail, making it safer for critical high-temperature service.
Need a Quote on Alloy Steel Welded Flanges?
Share your size, grade and quantity requirement and our team will get back to you with pricing and availability.