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ASTM A213, A249 TP321/321H Seamless, Welded, ERW Tubes ASTM A249 TP 321/321H ERW Tubing Supplier in Mumbai India.
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Stainless Steel 321 and 321H tubes are titanium-stabilized austenitic stainless steel products with outstanding resistance to intergranular corrosion. They maintain strength and toughness at temperatures up to 900°C. The main difference between 321 and 321H is that 321H has more carbon, which makes it stronger at high temperatures and against creep. These tubes include elements such as chromium, nickel, carbon, silicon, manganese, phosphorus, sulfur, nitrogen, titanium, and iron. Preston Pipes & Alloys is a leading stainless steel 321/321H tube supplier, delivering high-quality products that meet global standards. Both grades feature strong mechanical qualities, such as high tensile and yield strength, exceptional elongation, and regulated hardness, making them ideal for demanding industrial applications.
We offer Stainless steel 321 tubing in a wide range of sizes and specifications to suit different needs. Tube range covers 6.35 mm OD to 101.6 mm OD with gauges from 20 SWG to 10 SWG. It has an outer diameter that varies from 3.00 mm to 219.10 mm, with wall thicknesses from 0.40 mm to 12.70 mm. They are manufactured in schedules like 5, 10S, 10, 30, 40S, 40, 80, 80S, XS, 160, and XXH. Lengths can reach up to 30 meters, with custom cut lengths available. These tubes are manufactured with modern seamless and welded processes to ensure precise dimensions, consistent structure, and a superior polish.
Stainless Steel 321 tube offers excellent resistance to oxidation and scaling even in continuous service at high temperatures. They show strong toughness, good weldability, and long service life in harsh environments. They show strong toughness, good weldability, and long service life in harsh environments. These properties make them a preferred choice in industries like chemical processing, oil and gas, power generation, pharmaceuticals, food processing, and aerospace. Stainless Steel 321H tubes are utilized in heat exchangers, furnace components, exhaust systems, and high-temperature chemical equipment where durability and stability are critical.
Every 321 stainless steel tube undergoes strict quality checks before dispatch. To assure performance and safety, we conduct a variety of tests, such as chemical analysis, mechanical testing, hardness checks, hydrostatic testing and non-destructive exams. It is packed in accordance with international standards, including protective end caps, waterproof wrapping and wooden cases or crates to avoid damage during transportation. These tubes are equipped to meet the most stringent industrial requirements, due to their consistent quality, precise dimensions, and timely delivery. Choose our durable stainless steel 321/321H tubing for consistent performance and long-term value.
| Specifications | ASTM A213, A249, A270 / ASME SA213, SA249, SA270 |
| Standard | ASTM, ASME and API |
| Seamless Tubes Range | 1/2" OD - 12" OD |
| Welded Tubes Range | 1/2" OD - 12" OD, Gauge: 25 SWG - 10 SWG |
| Outside Diameter | 3.00 mm - 219.10 mm, 6.35 mm O.D to 114.3 mm O.D |
| Length | Single Random, Double Random & Required Length |
| Thickness | 0.40 mm - 12.70 mm, 0.8 mm to 12.7 mm |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH120, SCH140, SCH160, XXS |
| Type | Seamless, Welded, ERW |
| Form | Round Tubes, Square Tubes, Rectangular Tube |
| End | Plain End, Beveled End, Treaded |
SS 321/321H Seamless Tube
SS 321/321H Welded Tube
SS 321/321H ERW Tube
SS 321/321H EFW Tube
SS 321/321H Round Tube
SS 321/321H Square Tube
SS 321/321H Rectangular Tube
SS 321/321H Polished Tube
Contact Preston Pipes and Alloys for best offer & competitive
quotation of Stainless Steel 321/321H Tube
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 - 12.00 | 5(C+N) – 0.70 max |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 – 12.00 | 4(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 % |
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
