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Stainless Steel 321 Welded Pipe
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Neeka Tubes is a trusted manufacturer and supplier of Stainless Steel 321 Welded Pipe. We provide high-quality pipes with excellent strength and durability. Our products serve various industries with reliable performance. Stainless Steel 321 is stabilized austenitic steel, ideal for high temperatures. It offers great corrosion and oxidation resistance for long-lasting use. These pipes are easy to fabricate and maintain, ensuring excellent reliability.
Stainless Steel 321 Welded Pipe has a composition of carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel and titanium, giving it high strength and durability. With at least 17% chromium and 9% nickel, it provides excellent resistance to oxidation. The pipe has a tensile strength of 515 MPa and a yield strength of 205 MPa. It is available in sizes from 1″ NB to 16″ NB, with wall thickness options ranging from Schedule 10 to Schedule 160 and lengths between 1 meter and 12.5 meters.
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Benefits of Stainless Steel 321 Welded Pipe
- High-Temperature Strength – Maintains strength and stability up to 900°C, ensuring long-lasting performance in extreme conditions.
- Good Weldability – It is easy to weld using standard methods. This saves time and lowers manufacturing costs.
- Superior Creep Resistance – Handles long-term heat exposure without bending or breaking, ensuring a longer lifespan.
- Strong and Durable – It has high strength and toughness, ensuring reliability for heavy-duty applications.
- Low Maintenance – Resists rust, scaling and wear, keeping maintenance needs low and cost-effective.
Stainless Steel 321 Welded Pipe is ideal for high-temperature applications due to its excellent resistance to oxidation and corrosion. It is widely used in industries such as chemical, aerospace and petrochemical. The ASTM A312 Stainless Steel Welded Pipes can withstand extreme heat, making it perfect for heat exchangers, reactors and furnace parts. It is also commonly used in exhaust systems. Additionally, its superior resistance to high-temperature corrosion makes it a reliable choice for the food processing and pharmaceutical industries.
Most Common Types of Stainless Steel 321 Welded Pipe
SS 321 Welded Pipe
321 SS Round Pipe
SS 321 Welded Square Pipe
SS 321 Polished Pipe
SS 321 Schedule 40 Seamless Pipe
321 Stainless Steel Thin Wall Pipe
Stainless Steel 321 Custom Pipe
Stainless Steel 321 Cold Drawn Seamless Pipe
Stainless Steel 321 Welded Pipe Specifications
| Specification | Details |
|---|---|
| Grade | SS 321 |
| Standard | ASTM A312, ASME SA312, ASTM A358 |
| Material | Stainless Steel 321 |
| Outside Diameter (OD) | 6.35 mm to 914.4 mm (1/8” NB to 36” NB) |
| Wall Thickness | 0.5 mm to 50 mm |
| Length | Single Random, Double Random, and Custom Cut Lengths |
| Schedules | SCH 5, SCH 10, SCH 20, SCH 30, SCH 40, SCH 80, SCH 160, SCH XXS |
| Type | Welded (ERW, EFW) |
| Form | Round, Square, Rectangular, Coil, Hydraulic |
| Ends | Plain End, Beveled End, Threaded |
| Finish | 2B, BA, No. 1, No. 4, Mirror, Polished, etc. |
| Temper | Annealed or Pickled |
| Application | Chemical processing, Heat exchangers, Petroleum refineries, Food & beverage, Pharmaceutical industries |
| Surface | Smooth, resistant to corrosion and oxidation |
Looking For Fastest Delivery of Stainless Steel 321 Welded Pipe in Mumbai? Find Your Sizes and Thickness of SS 321 Welded Pipes in Our Ready Stock.
Stainless Steel 321 Welded Pipe Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 17.00 – 19.00 |
| Nickel (Ni) | 9.00 – 12.00 |
| Titanium (Ti) | 5 × (C + N) – 0.70 max |
Mechanical Properties of SS 321 Welded Pipe
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa (min) |
| Yield Strength (0.2% Proof) | 205 MPa (min) |
| Elongation | 40% (in 50mm) |
| Hardness | Rockwell B (HR B) max: 95, Brinell (HB) max: 217 |
Equivalent Grades For SS 321 Welded Pipe
| Grade | Equivalent Grades |
|---|---|
| SS 321 | AISI 321, UNS S32100, SAE 321 |
| SS 321H | AISI 321H, UNS S32109 |
| EN 1.4541 | Equivalent to SS 321/321H |
| DIN X6CrNiTi18-10 | Equivalent to SS 321/321H |
| JIS SUS 321 | Equivalent to SS 321 |
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UNS S31000 SS 321 Welded Pipe Dimnension
| Size (NB) | Outside Diameter (OD) mm | Wall Thickness (WT) mm | Schedule | Length |
|---|---|---|---|---|
| 1/8″ NB | 6.35 mm | 0.91 mm | Schedule 10, Schedule 40 | Up to 6 meters |
| 1/4″ NB | 9.52 mm | 1.24 mm | Schedule 10, Schedule 40 | Up to 6 meters |
| 1/2″ NB | 15.88 mm | 1.65 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 3/4″ NB | 19.05 mm | 1.91 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 1″ NB | 25.4 mm | 2.11 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 2″ NB | 50.8 mm | 2.77 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 4″ NB | 101.6 mm | 4.5 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 6″ NB | 152.4 mm | 5.6 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 8″ NB | 203.2 mm | 6.35 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 10″ NB | 254 mm | 7.1 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 12″ NB | 304.8 mm | 7.9 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 14″ NB | 355.6 mm | 8.2 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 16″ NB | 406.4 mm | 9.5 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 18″ NB | 457.2 mm | 10.4 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 20″ NB | 508 mm | 11.1 mm | Schedule 40, Schedule 80 | Up to 6 meters |
| 24″ NB | 609.6 mm | 12.7 mm | Schedule 40, Schedule 80 | Up to 6 meters |
Thickness Chart Of SS 321 in MM
| 321 Stainless Steel Pipe OD mm | Pipe WT mm | in. | Sch | Kg/m |
|---|---|---|---|---|
| 13.72 | 1.65 | 1/4 | 10S | 0.50 |
| 13.72 | 2.24 | 1/4 | 40S | 0.64 |
| 13.72 | 3.02 | 1/4 | 80S | 0.81 |
| 17.15 | 1.65 | 3/8 | 10S | 0.64 |
| 17.15 | 2.31 | 3/8 | 40S | 0.86 |
| 17.15 | 3.20 | 3/8 | 80S | 1.12 |
| 21.34 | 2.11 | 1/2 | 10S | 1.02 |
| 21.34 | 2.77 | 1/2 | 40S | 1.29 |
| 21.34 | 3.73 | 1/2 | 80S | 1.65 |
| 26.67 | 2.11 | 3/4 | 10S | 1.30 |
| 26.67 | 2.87 | 3/4 | 40S | 1.71 |
| 26.67 | 3.91 | 3/4 | 80S | 2.23 |
| 33.40 | 2.77 | 1 | 10S | 2.13 |
| 33.40 | 3.38 | 1 | 40S | 2.54 |
| 33.40 | 4.55 | 1 | 80S | 3.29 |
| 33.40 | 6.352) | 1 | 160 | 4.30 |
| 42.16 | 2.77 | 1¼ | 10S | 2.73 |
| 42.16 | 3.56 | 1¼ | 40S | 3.44 |
| 42.16 | 4.85 | 1¼ | 80S | 4.53 |
| 42.16 | 6.352) | 1¼ | 160 | 5.69 |
| 48.26 | 2.77 | 1½ | 10S | 3.16 |
| 48.26 | 3.68 | 1½ | 40S | 4.11 |
| 48.26 | 5.08 | 1½ | 80S | 5.49 |
| 60.33 | 2.77 | 2 | 10S | 3.99 |
| 60.33 | 3.91 | 2 | 40S | 5.52 |
| 60.33 | 5.54 | 2 | 80S | 7.60 |
| 60.33 | 8.742) | 2 | 160 | 11.29 |
| 73.03 | 3.05 | 2½ | 10S | 5.35 |
| 73.03 | 5.16 | 2½ | 40S | 8.77 |
| 73.03 | 7.01 | 2½ | 80S | 11.59 |
| 88.90 | 3.05 | 3 | 10S | 6.56 |
| 88.90 | 5.49 | 3 | 40S | 11.47 |
| 88.90 | 7.62 | 3 | 80S | 15.51 |
| 88.90 | 11.132) | 3 | 160 | 21.67 |
| 101.60 | 3.05 | 3½ | 10S | 7.53 |
| 101.60 | 5.74 | 3½ | 40S | 13.78 |
| 101.60 | 8.08 | 3½ | 80S | 18.92 |
| 114.30 | 3.05 | 4 | 10S | 8.50 |
| 114.30 | 6.02 | 4 | 40S | 16.32 |
| 114.30 | 8.56 | 4 | 80S | 22.67 |
| 114.30 | 13.492) | 4 | 160 | 34.05 |
| 141.30 | 6.55 | 5 | 40S | 22.10 |
| 141.30 | 9.53 | 5 | 80S | 31.44 |
| 141.30 | 15.882) | 5 | 160 | 49.87 |
| 168.28 | 3.4 | 6 | 10S | 14.04 |
| 168.28 | 7.11 | 6 | 40S | 28.69 |
| 168.28 | 10.97 | 6 | 80S | 43.21 |
| 168.28 | 14.27 | 6 | 120 | 54.75 |
| 168.28 | 18.262) | 6 | 160 | 68.59 |
| 219.08 | 8.18 | 8 | 40S | 43.20 |
| 219.08 | 12.7 | 8 | 80S | 65.63 |
| 219.08 | 18.23 | 8 | 120 | 91.30 |
| 219.08 | 23.012) | 8 | 160 | 112.97 |
SS 321 Welded Pipe Packing & Marking
Packaging and Delivery
Stainless Steel 321 Welded Pipes are packaged in various options, including loose, bundle, wooden pallets, wooden boxes, plastic cloth wraps, plastic end caps and beveled protectors.
The packaging is clearly marked with important details such as product code, material grade, size, weight, quantity, heat number, country of origin, handling instructions and customer information, making it easy to identify, handle and track the pipes throughout the delivery process.
Quality Checks & Certifications
SS 321 Welded Pipes undergoes rigorous quality tests, including product analysis, tension tests and hardness tests. Certificates like Manufacturer Test Certificate (EN10204 3.1, 3.2) and Laboratory Test Certificate from NABL-approved labs ensure compliance. 321 SS Welded Pipes undergo rigorous quality tests, including product analysis, tension tests and hardness tests. Certificates like Manufacturer Test Certificate (EN10204 3.1, 3.2) and Laboratory Test Certificate from NABL-approved labs ensure compliance. The pipes are also inspected under third-party agencies like SGS, TUV and Lloyd’s. Additional tests include NACE 0175, Weld Decay and Intergranular Corrosion tests.
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