Home > Alloy Steel > Alloy Steel F91 Flanges
Alloy steel F91 flangesare top-tier components built to deliver high performance in tough industrial settings. Combined with chromium, molybdenum, and additional alloys, these flanges offer outstanding strength, longevity, and resistance to elevated temperatures and pressures. They see extensive use in vital applications like oil and gas, petrochemicals and power generation. Beyond its mechanical qualities, alloy steel guarantees a secure, leak-free connection to F91 flange piping systems. This makes them a perfect option for settings that require robust and lasting solutions over an extended period.
Specifications :ASTM A182 / ASME SA182
Dimensions :ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Standard :ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size :1/2″ to 36″
Class / Pressure :150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flange Face Type :Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
| Grade | C | Mn | Si | S | P | Cr | Mo |
| A182 F91 | 0.08 – 0.12 | 0.3 – 0.6 | 0.5 | 0.01 | 0.02 | 8.5 – 9.5 | 0.85 – 1.05 |
| Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % |
| A182 F91 | 415 | 585 | 20 |
At Koasteel, we take pride in being the largest supplier and manufacturer in the New Zealand, delivering advanced solutions for every one of your piping requirements. With cutting-edge manufacturing facilities strategically situated in the New Zealand, we maintain an extensive stock of more than 25,000 tons of top-quality materials on hand and ready to ship.
Reach out to us for a fast quote tailored to your needs.
We provide these Alloy Steel F91 Flanges conforming to DIN, ISO, JIS or ANSI Standard.
Because Alloy Steel F91 Flanges offer outstanding mechanical properties along with resistance to wear, corrosion, and high temperatures, they see broad use across many industries. You will commonly find these flanges in the oil and gas, petrochemical, power generation, and aerospace sectors. They serve a key role in connecting equipment, valves, and piping systems. Thanks to their remarkable strength, toughness, and wear resistance, they are ideally suited for applications subjected to harsh operating conditions, including high temperatures, elevated pressures, and corrosive surroundings.
Yes, Alloy Steel F91 Flanges can be welded. They demonstrate good weldability, permitting effective joining and fabrication with standard welding methods. To preserve the material’s mechanical properties and safeguard the integrity of the welds, it is crucial to adhere to correct welding procedures, such as preheating, controlled heat input, and post-weld heat treatment. This guarantees the flanges operate dependably in demanding industrial applications.
Mail: sales@koasteel.nz
