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Girgaon, Mumbai - 400004
Stainless Steel 321H Welded Tubes Manufacturer in India
What Are Stainless Steel 321H Welded Tubes?
Stainless Steel 321H Welded Tubes are high-carbon, titanium-stabilized austenitic stainless steel tubes designed for improved strength at elevated temperatures. Grade 321H, identified by UNS S32109, combines the corrosion resistance of the 321 family with higher carbon content to provide enhanced high-temperature strength.
The titanium addition helps stabilize the alloy and reduces the tendency for chromium carbide precipitation during elevated-temperature exposure. The controlled higher carbon content of 321H provides improved creep and stress-rupture properties compared with standard Stainless Steel 321, making it suitable for demanding high-temperature service.
Stainless Steel 321H Welded Tubes can be supplied according to applicable ASTM and ASME specifications, depending on product form, dimensions and service requirements. These tubes are available in different outside diameters, wall thicknesses, lengths and finishes to meet industrial and project requirements.
Stainless Steel 321H Welded Tubes are commonly used in heat exchangers, power generation equipment, chemical processing systems, aerospace components, thermal processing equipment and high-temperature process piping. Their combination of titanium stabilization, corrosion resistance and elevated-temperature strength makes them suitable for demanding service conditions.
Kamal Steels is a reliable Stainless Steel 321H 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 321H Welded Tube Specifications
- Stainless Steel 321H Welded Tube Size Chart
- Stainless Steel 321H Welded Tube Standards
- Stainless Steel 321H Welded Tube Features
- Stainless Steel 321H Chemical Composition
- Stainless Steel 321H Mechanical Properties
- Stainless Steel 321H Welded Tube Applications
- Industries Using Stainless Steel 321H Welded Tubes
- Frequently Asked Questions
Stainless Steel 321H Welded Tube Specifications
Stainless Steel 321H Welded Tubes are supplied in different dimensions and material conditions according to applicable standards and customer requirements.
| Specification | Stainless Steel 321H Welded Tubes |
|---|---|
| Material | Stainless Steel |
| Grade | 321H |
| UNS | S32109 |
| 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 321H Welded Tube Size Chart
Stainless Steel 321H Welded Tubes are available in various outside diameters and wall thicknesses for high-temperature process and industrial 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 321H Welded Tube Standards
Stainless Steel 321H 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 321H Welded Tube Features
Stainless Steel 321H combines titanium stabilization with controlled higher carbon content, providing enhanced strength and reliable performance during elevated-temperature service.
- Excellent resistance to general corrosion
- Good resistance to intergranular corrosion
- Titanium-stabilized stainless steel grade
- Enhanced high-temperature strength
- Improved creep resistance
- Good stress-rupture properties
- Good resistance to oxidation
- Suitable for elevated-temperature applications
- Good weldability and fabrication characteristics
- Available in different sizes, wall thicknesses and finishes
Stainless Steel 321H Chemical Composition
The chemical composition of Stainless Steel 321H includes chromium and nickel with titanium added for stabilization. Its higher controlled carbon content contributes to improved strength during elevated-temperature service.
| Element | Composition (%) |
|---|---|
| Chromium | 17.0 - 19.0 |
| Nickel | 9.0 - 12.0 |
| Titanium | 4 × C min. to 0.70 max. |
| Carbon | 0.04 - 0.10 |
| Manganese | 2.00 max. |
| Silicon | 1.00 max. |
| Phosphorus | 0.045 max. |
| Sulfur | 0.030 max. |
| Iron | Balance |
Stainless Steel 321H Mechanical Properties
Stainless Steel 321H provides good mechanical strength with improved high-temperature performance compared with standard 321. 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 321H Welded Tube Applications
Stainless Steel 321H Welded Tubes are selected for applications requiring corrosion resistance and improved mechanical performance during prolonged exposure to elevated temperatures.
Heat Exchangers
Used in heat-transfer equipment operating under elevated-temperature conditions.
Chemical Processing
Used in selected process equipment requiring corrosion-resistant tubing for thermal service.
Power Generation
Used in high-temperature process and auxiliary equipment requiring enhanced strength.
Aerospace Equipment
Used in selected components exposed to elevated temperatures and thermal cycling.
Thermal Processing
Used in equipment exposed to prolonged elevated-temperature conditions.
Industrial Equipment
Used in fabricated tubular components requiring thermal stability and corrosion resistance.
Industries Using Stainless Steel 321H Welded Tubes
Stainless Steel 321H Welded Tubes are supplied to industries requiring corrosion-resistant tubing with improved strength for elevated-temperature applications.
Chemical Industry
Used in selected process equipment exposed to corrosive and elevated-temperature conditions.
Power Industry
Used in high-temperature equipment and auxiliary systems requiring enhanced material strength.
Aerospace Industry
Used in selected aerospace components and systems exposed to elevated temperatures.
Engineering Industry
Used in fabricated equipment and tubular systems designed for demanding thermal service.
Thermal Processing Industry
Used in equipment operating under prolonged elevated-temperature conditions.
Industrial Equipment Industry
Used in tubular components requiring corrosion resistance and improved high-temperature performance.
Frequently Asked Questions
Stainless Steel 321H Welded Tubes are high-carbon, titanium-stabilized austenitic stainless steel tubes manufactured using advanced welding technology. They are specifically designed for elevated-temperature applications requiring enhanced creep strength, oxidation resistance, and long-term mechanical stability.
Our Stainless Steel 321H Welded Tubes are manufactured according to ASTM A249, ASTM A269, ASTM A270, ASTM A554, ASME SA249, and ASME SA269 standards.
These welded tubes offer enhanced creep strength, excellent oxidation resistance, superior resistance to thermal fatigue, outstanding weldability, and long service life in continuous high-temperature environments.
They are widely used in power plants, petrochemical facilities, oil refineries, industrial boilers, heat exchangers, superheaters, pressure vessels, industrial furnaces, and high-temperature processing equipment.
Stainless Steel 321H has a higher carbon content than SS 321, providing improved creep resistance and higher mechanical strength during prolonged exposure to elevated temperatures while maintaining excellent resistance to intergranular corrosion.
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 321H Welded Tubes in various diameters, wall thicknesses, surface finishes, standard lengths, and custom-cut lengths according to customer specifications.
Yes. We export Stainless Steel 321H Welded Tubes worldwide with export-standard packaging, complete documentation, and timely international delivery.
Kamal Steels offers ASTM-compliant Stainless Steel 321H 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.