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Girgaon, Mumbai - 400004
Stainless Steel 321 Welded Pipes
Stainless Steel 321 Welded Pipe Manufacturer & Stockist in India
Applications involving repeated heating and welding require piping materials that can retain their corrosion resistance even after prolonged exposure to elevated temperatures. Kamal Steels Manufactures and Stocks Stainless Steel 321 Welded Pipes engineered to deliver dependable performance in thermal processing and corrosive industrial environments. Manufactured in accordance with ASTM A312 and ASME SA312 standards using Stainless Steel 321 (UNS S32100 / WNR 1.4541), our welded pipes combine excellent oxidation resistance, high-temperature stability and outstanding fabrication characteristics for critical process applications.
The titanium-stabilized composition of Stainless Steel 321 minimizes carbide precipitation during welding and continuous heat exposure, allowing the material to maintain its corrosion resistance and structural integrity in demanding operating conditions. These characteristics make SS 321 Welded Pipes an excellent choice for heat exchangers, furnace components, petrochemical plants, refineries, power generation facilities, exhaust systems and chemical processing industries where long-term thermal reliability is essential.
Every Stainless Steel 321 Welded Pipe manufactured by Kamal Steels is produced using certified raw materials and undergoes comprehensive quality inspections to verify weld integrity, dimensional accuracy and material compliance. Backed by extensive ready stock, project-specific manufacturing capabilities and prompt delivery, we supply high-quality welded piping solutions that meet the performance expectations of customers across India and international markets.
Stainless Steel 321 Welded Pipe Specifications
| Product | Stainless Steel 321 Welded Pipe |
|---|---|
| Material Grade | 321 (UNS S32100) |
| Manufacturing Standard | ASTM A312 / ASME SA312 |
| Outside Diameter | 1/8" NB to 24" NB (6 mm to 610 mm) |
| Wall Thickness | SCH 5S to SCH XXS |
| Pipe Type | Welded, ERW, EFW & Fabricated |
| Length | Single Random, Double Random & Custom Cut Length |
| End Type | Plain End, Beveled End & Threaded |
| Surface Finish | Annealed & Pickled, Bright Annealed, 2B, No.1 & Polished |
| Inspection | Hydro Test, PMI, Radiography, Eddy Current Test & EN 10204 3.1 MTC |
Features & Benefits of Stainless Steel 321 Welded Pipes
Applications of Stainless Steel 321 Welded Pipes
Stainless Steel 321 Welded Pipes are widely used in industries requiring reliable performance under elevated temperatures and corrosive operating conditions. Their titanium-stabilized composition makes them particularly suitable for welded systems exposed to continuous heat.
Available Size Range
Kamal Steels manufactures and supplies Stainless Steel 321 Welded Pipes in a wide range of dimensions to meet the requirements of power plants, petrochemical facilities, refineries, heat exchangers, and process industries. We also offer customized pipe sizes and lengths as per customer drawings and project specifications.
Available Pipe Schedules
| Pipe Schedule | Availability |
|---|---|
| SCH 5S | Available |
| SCH 10S | Available |
| SCH 20 | Available |
| SCH 40S | Available |
| SCH 60 | Available |
| SCH 80S | Available |
| SCH 120 | Available |
| SCH 160 | Available |
| XS | Available |
| XXS | Available |
Surface Finish of Stainless Steel 321 Welded Pipes
To satisfy different industrial and fabrication requirements, Stainless Steel 321 Welded Pipes are available in various surface finishes that improve corrosion resistance, appearance, and overall performance.
| Surface Finish | Description |
|---|---|
| Annealed & Pickled (AP) | Provides excellent corrosion resistance by removing surface scale after heat treatment. |
| Bright Annealed (BA) | Produces a clean, smooth, and reflective finish suitable for precision applications. |
| 2B Finish | Standard mill finish widely used in industrial processing equipment. |
| No.1 Finish | Hot rolled finish suitable for high-temperature service applications. |
| Polished Finish | Ideal for decorative, pharmaceutical, food processing, and hygienic installations. |
Manufacturing Standards
Every Stainless Steel 321 Welded Pipe manufactured by Kamal Steels complies with internationally recognized standards to ensure excellent dimensional accuracy, mechanical strength, and corrosion resistance.
| Standard | Description |
|---|---|
| ASTM A312 | Standard Specification for Seamless, Welded and Heavily Cold Worked Austenitic Stainless Steel Pipes. |
| ASME SA312 | Pressure piping specification for stainless steel welded pipes. |
| ASTM A358 | Electric Fusion Welded Austenitic Chromium-Nickel Stainless Steel Pipe. |
| ASTM A778 | Specification for welded, unannealed austenitic stainless steel tubular products. |
| ASME B36.19M | Dimensions for stainless steel pipe. |
| ASME B36.10M | Dimensions for welded and seamless steel pipes. |
Stainless Steel 321 Welded Pipe Chemical Composition
The balanced chemical composition of Stainless Steel 321 provides excellent oxidation resistance, improved weldability, and enhanced stability at elevated temperatures. The addition of titanium helps prevent chromium carbide precipitation during welding and prolonged heat exposure.
| Element | Composition (%) |
|---|---|
| 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) Min – 0.70 Max |
| Nitrogen (N) | 0.10 Max |
| Iron (Fe) | Balance |
Mechanical Properties of Stainless Steel 321 Welded Pipe
SS 321 Welded Pipes offer an excellent combination of strength, ductility, and high-temperature performance, making them suitable for pressure piping and thermal processing systems.
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa Minimum |
| Yield Strength (0.2% Offset) | 205 MPa Minimum |
| Elongation | 40% Minimum |
| Hardness | 95 HRB Maximum |
| Density | 7.90 g/cm³ |
| Melting Range | 1398 – 1454°C |
Equivalent Grades of Stainless Steel 321 Welded Pipe
| Standard | Grade |
|---|---|
| ASTM / ASME | 321 |
| UNS | S32100 |
| Werkstoff No. | 1.4541 |
| EN | X6CrNiTi18-10 |
| JIS | SUS 321 |
| ISO | 321 |
Why Choose Kamal Steels?
Kamal Steels is committed to delivering Stainless Steel 321 Welded Pipes that meet the highest standards of quality, reliability, and performance. Our products are manufactured from certified raw materials, inspected using advanced testing methods, and supplied with complete quality documentation. With a large inventory, customized manufacturing capabilities, competitive pricing, and timely worldwide delivery, we provide dependable piping solutions for industries requiring durable and high-performance stainless steel products.
Frequently Asked Questions
Stainless Steel 321 Welded Pipe is a titanium-stabilized austenitic stainless steel pipe designed for high-temperature service. It offers excellent resistance to intergranular corrosion and oxidation after welding.
Titanium stabilizes the material by preventing chromium carbide formation during welding, which improves resistance to intergranular corrosion and enhances long-term performance at elevated temperatures.
Our Stainless Steel 321 Welded Pipes are manufactured in accordance with ASTM A312, ASME SA312, ASTM A358, ASTM A778, ASME B36.19M, and related international standards.
Kamal Steels supplies SS 321 Welded Pipes from 1/8" NB to 24" NB in multiple schedules, wall thicknesses, and customized lengths according to project requirements.
They are widely used in petrochemical plants, refineries, power generation, aerospace, heat exchangers, exhaust systems, furnace equipment, and high-temperature process piping.
Yes. Stainless Steel 321 is specifically developed for continuous service at elevated temperatures while maintaining excellent oxidation resistance and mechanical strength.
Every pipe undergoes hydrostatic testing, Positive Material Identification (PMI), dimensional inspection, visual examination, radiographic testing, and other quality checks before delivery.
Yes. Kamal Steels supplies Stainless Steel 321 Welded Pipes with EN 10204 3.1 Mill Test Certificates, and third-party inspection can be arranged upon request.
Yes. We manufacture customized welded pipes in different diameters, wall thicknesses, lengths, end preparations, and surface finishes to meet specific project requirements.
Kamal Steels is a trusted manufacturer, supplier, stockist, and exporter offering premium-quality Stainless Steel 321 Welded Pipes, competitive pricing, certified materials, strict quality control, prompt delivery, and dependable customer support for projects across India and worldwide.