Girgaon, Mumbai - 400004
Kamal Steels is a leading Manufacturer and Stockist of Stainless Steel 304H Welded Tubes, supplying premium-quality welded tubing solutions for boilers, superheaters, heat exchangers, condensers, petrochemical plants, refineries, and high-temperature industrial applications. Manufactured from Stainless Steel 304H (UNS S30409 / WNR 1.4948), our welded tubes are produced in accordance with ASTM A249, ASTM A269, ASTM A270, ASTM A554 and ASME SA249 standards, ensuring excellent dimensional accuracy, superior weld quality, outstanding oxidation resistance and dependable mechanical performance. Stainless Steel 304H is the high-carbon version of SS 304, specifically developed for elevated-temperature service where improved creep strength and high-temperature durability are essential. ASTM recognizes TP304H as a high-temperature modification of TP304 for applications such as boilers, superheaters, and reheaters. :contentReference[oaicite:0]{index=0}
Our Stainless Steel 304H Welded Tubes are manufactured using premium-quality stainless steel strips that are precision roll-formed and automatically welded using advanced TIG/ERW welding technology. The tubes are subsequently solution annealed, pickled, straightened, polished and thoroughly inspected to achieve smooth surface finishes, excellent dimensional tolerances and long service life. These welded tubes provide excellent resistance to oxidation, thermal fatigue and elevated temperatures, making them suitable for heat exchangers, condensers, boiler tubing, furnace equipment, pressure vessels, process piping, instrumentation systems and other demanding industrial applications.
At Kamal Steels, we maintain a comprehensive inventory of ASTM A249 Stainless Steel 304H Welded Tubes in various outside diameters, wall thicknesses, schedules, surface finishes and custom lengths to meet urgent domestic and international project requirements. Every tube undergoes rigorous quality inspections, including Positive Material Identification (PMI), Chemical Analysis, Mechanical Testing, Hydrostatic Testing, Eddy Current Testing, Dimensional Inspection, Surface Finish Inspection, and Visual Inspection before dispatch. With certified quality, competitive pricing, export-standard packaging, and prompt worldwide delivery, Kamal Steels has established itself as a trusted manufacturer and supplier of Stainless Steel 304H Welded Tubes for critical high-temperature industrial applications across global markets.

Stainless Steel 304H Welded Tubes are specially engineered for elevated-temperature applications requiring excellent oxidation resistance, superior creep strength, and dependable long-term mechanical performance. As the high-carbon version of Stainless Steel 304, Grade 304H offers enhanced strength at high temperatures while maintaining excellent corrosion resistance and weldability. Manufactured using premium-quality stainless steel strips and advanced TIG/ERW welding technology, these tubes deliver exceptional dimensional accuracy, smooth surface finishes, and outstanding durability under severe operating conditions.
One of the key advantages of Stainless Steel 304H Welded Tubes is their ability to retain strength and structural stability at elevated temperatures. Their excellent resistance to oxidation, scaling, and thermal fatigue makes them an ideal choice for continuous service in boilers, superheaters, heat exchangers, pressure vessels, furnaces, refineries, petrochemical plants, and power generation facilities. These welded tubes also offer excellent fabrication characteristics, allowing easy forming, machining, and welding for a variety of industrial applications.
At Kamal Steels, we manufacture and supply premium-quality ASTM A249 Stainless Steel 304H Welded Tubes produced according to international quality standards. Every welded tube undergoes comprehensive quality inspections, including Mechanical Testing, Chemical Analysis, Positive Material Identification (PMI), Hydrostatic Testing, Eddy Current Testing, Dimensional Inspection, Surface Finish Inspection, and Visual Inspection to ensure exceptional product quality, reliability, and complete customer satisfaction.
Kamal Steels supplies Stainless Steel 304H Welded Tubes in a wide range of dimensions, schedules, surface finishes, and international specifications to meet the requirements of boilers, heat exchangers, condensers, petrochemical plants, refineries, power generation, and other high-temperature industrial applications. Our welded tubes are manufactured with stringent quality control to ensure superior weld integrity, excellent dimensional accuracy, and dependable performance under elevated operating temperatures.
| Specifications | ASTM A249, ASTM A269, ASTM A270, ASTM A554, ASME SA249, ASME SA269 |
|---|---|
| Standard | ASTM, ASME, DIN, EN, ISO, JIS |
| Material Grade | Stainless Steel 304H (UNS S30409 / WNR 1.4948) |
| Outside Diameter | 6.35 mm to 219.10 mm (1/4" NB to 8" NB) |
| Wall Thickness | 0.5 mm to 12.7 mm (SCH 5S to SCH XXS) |
| Length | Single Random, Double Random, 6 Meter, 12 Meter & Custom Cut Lengths |
| Tube Form | Round, Square, Rectangular, Hydraulic, Instrumentation |
| Surface Finish | Annealed, Pickled, Bright Annealed (BA), Polished, Mirror Polish, Satin Finish |
| End Finish | Plain End, Beveled End, Threaded End |
| Manufacturing Process | TIG Welded, ERW Welded, Cold Drawn & Annealed |
| Testing | PMI, Hydrostatic Test, Eddy Current Test, Ultrasonic Test, Mechanical Test, Chemical Analysis |
| Certification | EN 10204 3.1 / 3.2 Mill Test Certificate (MTC) |
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 18.00 – 20.00 |
| Nickel (Ni) | 8.00 – 10.50 |
| Carbon (C) | 0.04 – 0.10 |
| Manganese (Mn) | 2.00 Max |
| Silicon (Si) | 1.00 Max |
| Phosphorus (P) | 0.045 Max |
| Sulfur (S) | 0.030 Max |
| Iron (Fe) | Balance |
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa Minimum |
| Yield Strength | 205 MPa Minimum |
| Elongation | 40% Minimum |
| Hardness | 201 HB Max |
| Density | 8.00 g/cm³ |
| Standard | Equivalent Grade |
|---|---|
| UNS | S30409 |
| Werkstoff No. | 1.4948 |
| EN | X6CrNi18-10 |
| DIN | 1.4948 |
| JIS | SUS 304H |
Stainless Steel 304H Welded Tubes are extensively used in industries operating under elevated temperatures where excellent oxidation resistance, superior creep strength, and long-term mechanical stability are essential. Their high carbon content enhances strength at elevated temperatures, making them an ideal choice for high-temperature pressure equipment and continuous service applications. These welded tubes provide outstanding durability, reliable performance, and extended service life while minimizing maintenance requirements in demanding industrial environments.
At Kamal Steels, every Stainless Steel 304H Welded Tube undergoes comprehensive inspection and testing to ensure compliance with ASTM, ASME, and customer specifications. Each welded tube is carefully inspected for chemical composition, weld integrity, dimensional accuracy, mechanical properties, surface quality, and overall product performance before dispatch.
Kamal Steels follows international export packaging standards to ensure that Stainless Steel 304H Welded Tubes reach customers safely without damage during transportation and storage. Tubes are protected with plastic end caps, securely bundled, wrapped with protective materials, and packed in fumigated wooden boxes, export-quality wooden crates, or pallets to prevent moisture, scratches, dents, and transit damage.
Each welded tube is permanently marked with the material grade, specification, size, schedule, heat number, manufacturer's identification, and batch details for complete material traceability. Every shipment is supplied with EN 10204 3.1/3.2 Mill Test Certificates, inspection reports, packing lists, commercial invoices, certificates of compliance, and third-party inspection certificates whenever requested, ensuring complete documentation for domestic and international industrial projects.
Kamal Steels is a trusted manufacturer, supplier, stockist, and exporter of Stainless Steel 304H Welded Tubes, supplying premium-quality stainless steel tubing solutions for boilers, superheaters, heat exchangers, condensers, petrochemical plants, refineries, power generation facilities, and other high-temperature industrial applications. Manufactured according to ASTM and ASME standards, our welded tubes provide outstanding oxidation resistance, superior creep strength, excellent weld quality, and dependable long-term performance under elevated operating temperatures.
We maintain a comprehensive inventory of ASTM A249 Stainless Steel 304H Welded Tubes in various outside diameters, wall thicknesses, schedules, surface finishes, and custom lengths to meet urgent domestic and international project requirements. Every welded tube undergoes comprehensive quality inspections, including Positive Material Identification (PMI), Chemical Analysis, Mechanical Testing, Hydrostatic Testing, Ultrasonic Testing, Eddy Current Testing, Dimensional Inspection, Surface Finish Inspection, and Visual Inspection to ensure complete compliance with international quality standards and customer specifications.
With decades of manufacturing expertise, ready stock availability, competitive pricing, certified quality, export-standard packaging, and a strong global supply network, Kamal Steels has become the preferred manufacturer and supplier of Stainless Steel 304H Welded Tubes across international markets. Our commitment to quality, technical support, prompt delivery, and complete documentation enables us to provide dependable stainless steel tubing solutions for the most demanding high-temperature industrial applications worldwide.
Stainless Steel 304H Welded Tubes are high-carbon austenitic stainless steel tubes manufactured using advanced welding technology. They are specifically designed for elevated-temperature applications requiring improved creep strength and oxidation resistance.
Our Stainless Steel 304H 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, improved creep strength, superior high-temperature performance, excellent weldability, and outstanding corrosion resistance in oxidizing environments.
They are widely used in boilers, superheaters, heat exchangers, condensers, petrochemical plants, oil refineries, pressure vessels, furnaces, power generation facilities, and chemical processing industries.
Stainless Steel 304H contains a higher carbon content than standard 304, providing improved creep strength and better mechanical performance at elevated temperatures, making it suitable for high-temperature pressure applications.
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 304H Welded Tubes in various diameters, wall thicknesses, surface finishes, standard lengths, and custom-cut lengths according to customer specifications.
Yes. We export Stainless Steel 304H Welded Tubes worldwide with export-standard packaging, complete documentation, and timely international delivery.
Kamal Steels offers ASTM-compliant Stainless Steel 304H 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.