Alloy Steel Flanges are high-strength forged components designed for high-temperature, high-pressure, and corrosive service conditions. These flanges are alloyed with elements such as chromium, molybdenum, and manganese to enhance mechanical strength, oxidation resistance, and creep resistance.
Alloy Steel Flanges are extensively used in power plants, refineries, petrochemical units, and critical industrial piping systems where leak-proof joints, durability, and long service life are essential.
Alloy Steel Flanges are manufactured in accordance with ASTM A182, ASTM A694, and related international standards. Commonly supplied grades include F1, F5, F9, F11, F12, F22, F65, and F91, offering excellent performance under high pressure and elevated temperature conditions.
Alloy Steel Flange Manufacturer in India | ASTM A182 F1, F5, F9, F11, F22, F91 & A694 F65 Flanges Supplier
Applications of Alloy Steel Flanges
| ● Power Generation & Thermal Power Plants |
| ● Oil & Gas Refineries and Pipelines |
| ● Petrochemical & Chemical Processing Plants |
| ● Boilers, Heat Exchangers & Pressure Vessels |
| ● High-Pressure & High-Temperature Piping Systems |
| ● Fertilizer, Process & Offshore Industries |
Specification Table of Alloy Steel Flanges
| Standard | ASTM A182, ASTM A694, ASME SA182 |
|---|---|
| Grades | F1, F5, F9, F11, F12, F22, F91, A694 F65 |
| Size | 1/2″ NB to 48″ NB |
| Pressure Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Types | Weld Neck, Slip On, Blind, Socket Weld, Threaded, RTJ, Lap Joint |
| Surface Finish | Annealed, Pickled, Machined, Black, Coated |
Alloy Steel Flange Grades (Sub-Products)
| ● Alloy Steel F1 Flanges – Low alloy steel for moderate temperature applications |
| ● Alloy Steel F5 Flanges – Chromium-molybdenum steel for high-temperature service |
| ● Alloy Steel F9 Flanges – Improved oxidation and corrosion resistance |
| ● Alloy Steel F11 Flanges – Widely used in boilers and pressure vessels |
| ● Alloy Steel F12 Flanges – Enhanced creep resistance at elevated temperatures |
| ● Alloy Steel F22 Flanges – Excellent strength and corrosion resistance |
| ● ASTM A694 F65 Flanges – High-strength flanges for pipeline and offshore service |
| ● Alloy Steel F91 Flanges – Advanced creep-resistant alloy for power plants |
Mechanical Properties (Typical)
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation % |
|---|---|---|---|
| ASTM A182 F11 | 205 | 415 | 20 |
| ASTM A182 F22 | 205 | 415 | 20 |
| ASTM A182 F91 | 415 | 585 | 20 |
| ASTM A694 F65 | 450 | 535 | 22 |