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Girgaon, Mumbai - 400004
Stainless Steel 321 Welded Tubes Manufacturer in India
What Are Stainless Steel 321 Welded Tubes?
Stainless Steel 321 Welded Tubes are stabilized austenitic stainless steel tubes containing chromium, nickel and titanium. Grade 321, identified by UNS S32100, is designed to provide good corrosion resistance and improved resistance to intergranular corrosion following exposure to elevated temperatures.
The addition of titanium stabilizes the carbon in the alloy and helps reduce chromium carbide precipitation during heating and welding. This makes Stainless Steel 321 particularly suitable for welded tube applications involving elevated-temperature service and repeated thermal exposure.
Stainless Steel 321 Welded Tubes can be supplied according to applicable ASTM and ASME specifications, depending on the product form, dimensions and service requirements. These tubes are available in different outside diameters, wall thicknesses, lengths and finishes to meet specific industrial requirements.
Stainless Steel 321 Welded Tubes are commonly used in heat exchangers, chemical processing equipment, aerospace components, power generation systems, exhaust systems and high-temperature process equipment. Their combination of corrosion resistance, thermal stability and weldability makes them suitable for demanding applications.
Kamal Steels is a reliable Stainless Steel 321 Welded Tubes Manufacturer and Stockist in India, supplying tubes in different sizes, wall thicknesses, lengths and finishes. We cater to domestic and international requirements with suitable MTC, inspection documentation and export packaging.
Table of Contents
- Stainless Steel 321 Welded Tube Specifications
- Stainless Steel 321 Welded Tube Size Chart
- Stainless Steel 321 Welded Tube Standards
- Stainless Steel 321 Welded Tube Features
- Stainless Steel 321 Chemical Composition
- Stainless Steel 321 Mechanical Properties
- Stainless Steel 321 Welded Tube Applications
- Industries Using Stainless Steel 321 Welded Tubes
- Frequently Asked Questions
Stainless Steel 321 Welded Tube Specifications
Stainless Steel 321 Welded Tubes are supplied in different dimensions and material conditions according to applicable standards and customer requirements.
| Specification | Stainless Steel 321 Welded Tubes |
|---|---|
| Material | Stainless Steel |
| Grade | 321 |
| UNS | S32100 |
| Tube Type | Welded |
| ASTM Standard | ASTM A249 / Applicable ASTM Specification |
| ASME Standard | ASME SA249 / Applicable ASME Specification |
| Outside Diameter | As per requirement |
| Wall Thickness | As per requirement |
| Schedule | As required |
| Length | Random, Fixed or Customized |
| Finish | Annealed, Pickled, Polished or As required |
Stainless Steel 321 Welded Tube Size Chart
Stainless Steel 321 Welded Tubes are available in various outside diameters and wall thicknesses for process, fabrication and high-temperature service applications. Customized dimensions and lengths can also be supplied according to project requirements.
| Tube Size | Outside Diameter (mm) | Wall Thickness | Length |
|---|---|---|---|
| 1/2" | 12.70 | As required | As required |
| 3/4" | 19.05 | As required | As required |
| 1" | 25.40 | As required | As required |
| 1-1/2" | 38.10 | As required | As required |
| 2" | 50.80 | As required | As required |
| 3" | 76.20 | As required | As required |
| 4" | 101.60 | As required | As required |
| 6" | 152.40 | As required | As required |
| 8" | 203.20 | As required | As required |
Stainless Steel 321 Welded Tube Standards
Stainless Steel 321 Welded Tubes can be supplied according to applicable ASTM and ASME requirements based on product form, dimensions and service conditions.
| Standard | Application / Product Requirement |
|---|---|
| ASTM A249 | Welded austenitic stainless steel tubes for heat exchangers, boilers and condensers |
| ASTM A269 | Seamless and welded austenitic stainless steel tubing for general corrosion-resisting service |
| ASME SA249 | Applicable welded austenitic stainless steel tubing requirements |
| ASME SA269 | Applicable austenitic stainless steel tubing requirements for general service |
Stainless Steel 321 Welded Tube Features
Stainless Steel 321 combines titanium stabilization with austenitic stainless steel chemistry, providing reliable performance in welded components exposed to elevated temperatures.
- Excellent resistance to general corrosion
- Good resistance to intergranular corrosion after elevated-temperature exposure
- Titanium-stabilized stainless steel grade
- Good elevated-temperature performance
- Good resistance to oxidation
- Excellent weldability
- Good strength and toughness
- Suitable for repeated thermal exposure
- Good fabrication characteristics
- Available in different sizes, wall thicknesses and finishes
Stainless Steel 321 Chemical Composition
The chemical composition of Stainless Steel 321 includes chromium and nickel with titanium added as a stabilizing element. This composition helps provide corrosion resistance and improved resistance to sensitization during elevated-temperature exposure.
| Element | Composition (%) |
|---|---|
| Chromium | 17.0 - 19.0 |
| Nickel | 9.0 - 12.0 |
| Titanium | 5 × C min. to 0.70 max. |
| Carbon | 0.08 max. |
| Manganese | 2.00 max. |
| Silicon | 1.00 max. |
| Phosphorus | 0.045 max. |
| Sulfur | 0.030 max. |
| Iron | Balance |
Stainless Steel 321 Mechanical Properties
Stainless Steel 321 offers a combination of strength, ductility and corrosion resistance for applications involving elevated-temperature exposure. Mechanical requirements depend on product dimensions, material condition and applicable specification.
| Property | Minimum Requirement |
|---|---|
| Tensile Strength | 515 MPa min. |
| Yield Strength | 205 MPa min. |
| Elongation | 40% min. |
| Density | Approx. 8.0 g/cm³ |
Note: Mechanical properties may vary according to product form, dimensions, heat treatment and applicable specification. Final values should be confirmed from the relevant material test certificate.
Stainless Steel 321 Welded Tube Applications
Stainless Steel 321 Welded Tubes are selected for applications requiring corrosion resistance, welded fabrication and reliable performance under elevated-temperature conditions.
Heat Exchangers
Used in heat-transfer equipment exposed to elevated temperatures and thermal cycling.
Chemical Processing
Used in selected process equipment requiring corrosion-resistant stainless steel tubing.
Aerospace Equipment
Used in selected aerospace components and systems requiring heat-resistant stainless steel materials.
Power Generation
Used in selected high-temperature process and auxiliary equipment.
Exhaust Systems
Used in components exposed to elevated temperatures and repeated thermal cycling.
Industrial Equipment
Used in fabricated tubular components requiring corrosion resistance and thermal stability.
Industries Using Stainless Steel 321 Welded Tubes
Stainless Steel 321 Welded Tubes are supplied to industries requiring corrosion-resistant tubing for elevated-temperature and thermally demanding applications.
Aerospace Industry
Used in selected components and systems exposed to elevated temperatures.
Chemical Industry
Used in process equipment and tubular systems requiring corrosion resistance.
Power Industry
Used in selected high-temperature equipment and auxiliary systems.
Engineering Industry
Used in fabricated equipment exposed to thermal cycling and elevated temperatures.
Automotive Industry
Used in selected exhaust and high-temperature tubular components.
Industrial Equipment Industry
Used in tubular components requiring corrosion resistance and thermal stability.
Frequently Asked Questions
Stainless Steel 321 Welded Tubes are titanium-stabilized austenitic stainless steel tubes manufactured using advanced welding technology. They are designed for elevated-temperature applications requiring excellent oxidation resistance, superior weld stability, and resistance to intergranular corrosion.
Our Stainless Steel 321 Welded Tubes are manufactured according to ASTM A249, ASTM A269, ASTM A270, ASTM A554, ASME SA249, and ASME SA269 standards.
These welded tubes provide excellent oxidation resistance, superior high-temperature strength, outstanding weldability, resistance to sensitization, thermal fatigue resistance, and long service life in elevated-temperature environments.
They are widely used in aerospace industries, petrochemical plants, oil refineries, power generation facilities, boilers, heat exchangers, industrial furnaces, exhaust systems, and pressure vessels.
Titanium stabilizes the stainless steel by preventing carbide precipitation during welding and prolonged heating, significantly improving resistance to intergranular corrosion while maintaining excellent mechanical strength at elevated temperatures.
Each tube undergoes PMI Testing, Chemical Analysis, Mechanical Testing, Hydrostatic Testing, Ultrasonic Testing (UT), Eddy Current Testing (ECT), Dimensional Inspection, Surface Finish Inspection, and Visual Inspection.
Yes. Every shipment includes EN 10204 3.1/3.2 Mill Test Certificates, inspection reports, complete material traceability, and third-party inspection certificates upon request.
Yes. Kamal Steels supplies Stainless Steel 321 Welded Tubes in various diameters, wall thicknesses, surface finishes, standard lengths, and custom-cut lengths according to customer specifications.
Yes. We export Stainless Steel 321 Welded Tubes worldwide with export-standard packaging, complete documentation, and timely international delivery.
Kamal Steels offers ASTM-compliant Stainless Steel 321 Welded Tubes with ready stock, certified quality, competitive pricing, stringent quality control, export-standard packaging, complete documentation, and dependable worldwide delivery for critical high-temperature industrial applications.