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- Kolkata, Kolkata
Home > Stainless Steel >Stainless Steel 321 and 321H EFW Pipes
Ojas Pipes and Tubes, a reliable manufacturer and exporter from Kolkata, India, deals in High-Quality Stainless Steel 321 and 321H EFW (Electric Fusion Welded) Pipes. Famous for their accurate engineering and long-lasting performance, Ojas serves different industries with a promise of quality, timely supply, and customer satisfaction. The company ensures that every product is up to the international standards and specifications. With a team of experts and state–of-the-art infrastructure, Ojas Pipes and Tubes has acquired a strong position in the stainless steel pipe and tube market in India and overseas.
Stainless Steel 321 and 321H EFW Pipes are titanium-stabilized austenitic stainless steels. Their general composition is 17–19% Chromium, 9–12% Nickel, and Titanium in quantities equal to or more than five times the content of carbon and nitrogen. Type 321H has a higher carbon content to provide greater high-temperature strength. These pipes provide a tensile strength of about 515 MPa, yield strength of 205 MPa, and elongation of about 35%. They have a good resistance against intergranular corrosion and work well under high-temperature and high-pressure conditions.
| Specification | ASTM A358 / ASME SA358 |
| Specification | A / SA358 CLASS 1, A / SA358 CLASS 2, A / SA358 CLASS 3, A / SA358 CLASS 4, A / SA358 CLASS 5 |
| Grades | 304, 304L, 304H, 309S, 310S, 316, 316L, 316H, 317L, 321, 321H, 347, 347H, 904L ETC. |
| Type | EFW, ELECTRIC FUSION WELDED |
| Outer Diameter Size | Electric Fusion Welded / ERW- 8″ NB To 110″ NB (Nominal Bore Size) |
| Wall Thickness | Schedule 10 To Schedule 160 (3 mm to 100 mm Thickness) |
| Length | 01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size. |
| Ends | Plain Ends / Beveled Ends |
| Delivery Conditions | As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered |
| Coating | Electropolish, Mechanical Polish, Satin Finish, Passivated |
| Dimension | All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM and ASME |
| Value Added Services | Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment |
| Packaging | Loose / Bundle / Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
| Material Test Certificate | Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC |
| STANDARD | UNS | WERKSTOFF NR. | EN | JIS |
| SS 321 | S32100 | 1.4541 | X6CrNiTi18-10 | SUS 321 |
| SS 321H | S32109 | 1.4878 | X12CrNiTi18-9 | SUS 321H |
| 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 |
| Tensile Strength | Yield Strength (0.2%Offset) | Elongation | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | |||
| Psi – 75000, MPa – 515 | Psi – 30000, MPa – 205 | 35 % | 95 | 217 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Stainless Steel 321 and 321H EFW Pipes from Ojas Pipes and Tubes guarantees excellent corrosion resistance, high strength, and durability. Designed for diverse industrial applications, it delivers reliable performance in tough environments while maintaining competitive pricing for cost-effective solutions.
| NPS Designator | Outside Diameter | Nominal Wall Thickness | ||||||||
| in. | mm | Schedule 5SA | Schedule 10SA | Schedule 40SA | Schedule 80SA | |||||
| in. | mm | in. | mm | in. | mm | in. | mm | |||
| 8 | 8.625 | 219.08 | 0.109 | 2.77 | 0.148 | 3.76 | 0.322 | 8.18 | 0.500 | 12.70 |
| 10 | 10.750 | 273.05 | 0.134 | 3.40 | 0.165 | 4.19 | 0.365 | 9.27 | 0.500B | 12.70B |
| 12 | 12.750 | 323.85 | 0.156 | 3.96 | 0.180 | 4.57 | 0.375B | 9.52B | 0.500B | 12.70B |
| 14 | 14.000 | 355.60 | 0.156 | 3.96 | 0.188B | 4.78B | … | … | … | … |
| 16 | 16.000 | 406.40 | 0.165 | 4.19 | 0.188B | 4.78B | … | … | … | … |
| 18 | 18.000 | 457.20 | 0.165 | 4.19 | 0.188B | 4.78B | … | … | … | … |
| 20 | 20.000 | 508.00 | 0.188 | 4.78 | 0.188B | 4.78B | … | … | … | … |
| 22 | 22.000 | 558.80 | 0.188 | 4.78 | 0.218B | 5.54B | … | … | … | … |
| 24 | 24.000 | 609.60 | 0.218 | 5.54 | 0.250 | 6.35 | … | … | … | … |
| 30 | 30.000 | 762.00 | 0.250 | 6.35 | 0.312 | 7.92 | … | … | … | … |
We offer custom sizes for Stainless Steel 321 and 321H EFW Pipes to meet your specific needs. Our dedicated team at Ojas Pipes and Tubes provides tailored solutions for all your piping and tubing requirements. For more information, contact us at sales@ojaspipesandtubes.co.in.
Stainless Steel 321 and 321H EFW Pipes are used extensively in high–corrosion–resistance and heat-stability demanding industries. Typical uses involve exhaust manifolds, heat exchangers, boilers, pressure vessels, and petrochemical equipment. Their thermal resistance up to 900°C makes them well suited for thermal processing equipment, aerospace application, and refinery systems. The pipes are also used in chemical processing plants because of their resistance to inorganic and organic chemicals. Their weldability and formability enable simple fabrication, establishing them as a suitable option for both commercial and industrial high-temperature usage.
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