Stainless Steel 321 Flanges are utilized as a part of combinations of various modern purposes and are extensively used to interface channels. We Piyush steel is the leading manufacturer, supplier, and exporter of these flanges which is made with the best quality of alloy. We offer these flanges in various specifications like length, standard, surface finish, dimensions, wall thickness, and end finish. Moreover, we are working to deliver the urgent orders of the client. As specified by our clients the product is being manufactured. These flanges are used in many applications in industries such as power generation, petrochemicals, sea water equipment, chemical equipment, etc.
Table Of Content
Alloy description-
Alloy 321 is austenitic titanium stabilized chromium-nickel stainless steel which is developed to provide Intergranular corrosion resistance ability. This is considered for the applications requiring welding under high temperatures. The alloy contains carbon 0.08%, 0.75% of silicon, 0.10% of nitrogen, and 2% manganese. This stabilizes the material against chromium carbide formation in addition to titanium.
Features of the flanges-
The Stainless Steel 321 flanges have different properties that make it the most reliable product among the industries. The characteristics it possesses are-
• Corrosion resistance ability
• High weldability property
• Durability
• Pitting corrosion cracking
• Resistance to oxidation
• Preventing from getting rust
• Corrode free
• Toughness
Production of the flanges-
Stainless Steel 321 flanges are manufactured by collecting the best alloy. The alloy before use is tested by the experts so that no poor quality is taken in the manufacturing process. We have all modern equipment, machineries and latest technologies to manufacture the flanges. The professional experts are hired to check the quality of the flanges that have good knowledge about the manufacturing norms that must be taken care of. Furthermore, we have a quality check at every stage of the manufacturing process to avoid any kind of delays at the last stages of the production. The national and international quality standards are kept for deciding the ranges of the flanges.
Inspection-
The inspection is conducted on a regular basis in our organization. The third party inspection team conducts the inspection to keep a check on the quality of the product. So, that no poor quality of flanges is delivered to our clients.
Testing of the flanges-
We are adhering to providing the best quality of flanges to our esteemed clients. Thus for this, the flanges go through various tests such as pitting resistance test, Intergranular corrosion test, flaring test, macro test, micro test, chemical test, mechanical test, radiography test, and hydrostatic test.
Material test certification-
Many test certifications are offered to the clients for their doubt clearance about the product. The documents are-
• Mill certification according to EN 10204/3.1b
• Raw material certificate
• 100% radiography test report
• Third party inspection report
Documents-
We attach several documents along with the delivered material before dispatching. They are-
• Commercial invoice
• Radiography test report
• Fumigation certificate
• Raw material test report
• Material traceability report
• Packaging list
• Laboratory test report
• Guarantee letter of the company
Packaging of the flanges-
The Stainless Steel 321 Flanges are packed with utmost care to avoid damages at the time of delivery of the product. The flanges are packed in bundles and are wrapped with the environmental friendly poly bags to keep the flanges free from the extreme weather conditions. Forms avoiding the flanges from getting rust during the time of shipment, the bundles of flanges are packed in the wooden boxes, wooden crates, etc. All the shipment documents are attached to the wooden boxes along with the product description like heat number, product number, size, and quality. We ensure secure, safe and timely delivery of the product.
SS 321 stainless steel flanges are ideal for high-temperature applications as they are more corrosion-resistant than SS 304 stainless steel flanges. This property is attributed to the nickel alloy's titanium, which helps stabilize the material and increases its tolerance to heat. The production process involves pre-shaped pieces of stainless steel forming into their final shape with a die, thus ensuring superior quality and strength. In addition, heat treating further hardens the fittings by annealing them at temperatures between 1050-1150°C, making them more susceptible to corrosion due to their increased hardness. SS 304 stainless steel flanges are better suited for low-temperature conditions, & while they may not be as strong or corrosion-resistant as SS 321, they can still offer good durability.
SS 321 stainless steel is an alloy that combines iron, chromium, nickel, and titanium. It is one of the austenitic grades of stainless steel & has a high resistance to intergranular corrosion and high levels of strength and durability. The equivalent materials to SS 321 include 310S stainless steel, ASTM A312TP347H stainless steel, and SUS 347H stainless steel. These materials are all austenitic grades with similar properties to SS 321 but may be better suited for certain applications than others.
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
Pipe Specification : ASTM A182 / ASME SA182
Dimension Standard : 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" (15 NB) to 48" (1200NB)
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)
DIN Flanges : DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673
JIS Flanges : JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K
BS Flanges : BS4504 PN 6, BS 4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS 4504 PN 64, BS 4504 PN 100, BS 4504 PN 160, BS 4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | - | 9.00 - 12.00 | 5(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
The full identification of the flanges should be continuously marked down its whole length, including :

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ASME Flanges, DIN Flanges, ANSI Flanges With Mill And Third Party Test Certificate.
Stainless Steel 321 Flanges Price List
Request the latest Stainless Steel 321 Flanges Price List. Please Call +91 22 23867540 or Send an Email to [email protected] for Stainless Steel UNS S32100, 1.4541, SUS 321 Pipe Flanges Ready stock information and updated price list.