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Girgaon, Mumbai - 400004
Stainless Steel 304H Welded Tubes Manufacturer in India
What Are Stainless Steel 304H Welded Tubes?
Stainless Steel 304H Welded Tubes are tubular products manufactured from high-carbon austenitic stainless steel by forming the material into a tubular shape and joining the edges through a controlled welding process. Grade 304H, identified by UNS S30409, offers a combination of good corrosion resistance, strength, durability and improved high-temperature performance.
Stainless Steel 304H Welded Tubes are commonly supplied according to applicable ASTM specifications such as ASTM A312 and ASTM A249, depending on the product form and application requirements. These specifications cover applicable stainless steel pipe and welded tubing requirements for demanding industrial and high-temperature service.
Stainless Steel 304H is valued for its good corrosion resistance, elevated-temperature strength, oxidation resistance and durability. Its higher carbon content provides improved creep and stress-rupture strength at elevated temperatures compared with standard Stainless Steel 304.
These tubes are used in heat exchangers, boilers, chemical processing equipment, petrochemical plants, power generation, process piping and high-temperature industrial systems. They are available in different outside diameters, wall thicknesses, schedules, lengths and finishes according to customer and project requirements.
Kamal Steels is a reliable Stainless Steel 304H Welded Tubes Manufacturer and Stockist in India, supplying welded tubes in different sizes, wall thicknesses, lengths and finishes. We cater to domestic and international requirements with suitable material test certificates, inspection documentation and export packaging.
Table of Contents
- Stainless Steel 304H Welded Tube Specifications
- Stainless Steel 304H Welded Tube Size Chart
- Stainless Steel 304H Welded Tube Standards
- Stainless Steel 304H Welded Tube Features
- Stainless Steel 304H Chemical Composition
- Stainless Steel 304H Mechanical Properties
- Stainless Steel 304H Welded Tube Applications
- Industries Using Stainless Steel 304H Welded Tubes
- Frequently Asked Questions
Stainless Steel 304H Welded Tube Specifications
Stainless Steel 304H Welded Tubes are supplied in different dimensions and product conditions according to applicable ASTM, ASME and customer requirements.
| Specification | Stainless Steel 304H Welded Tubes |
|---|---|
| Material | Stainless Steel |
| Grade | 304H |
| UNS | S30409 |
| Tube Type | Welded |
| ASTM Standard | ASTM A312 / ASTM A249, as applicable |
| ASME Standard | ASME SA312 / SA249, as applicable |
| 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 304H Welded Tube Size Chart
Stainless Steel 304H Welded Tubes are available in different outside diameters and wall thicknesses for industrial, process and high-temperature applications. Custom sizes 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 304H Welded Tube Standards
Stainless Steel 304H Welded Tubes can be supplied according to applicable ASTM and ASME specifications depending on product form, application and customer requirements.
| Standard | Application / Product Requirement |
|---|---|
| ASTM A312 | Seamless, welded and heavily cold-worked austenitic stainless steel pipes |
| ASTM A249 | Welded austenitic stainless steel tubes for heat exchangers, boilers and condensers |
| ASME SA312 | ASME specification for applicable stainless steel pipe requirements |
| ASME SA249 | ASME specification for applicable welded austenitic stainless steel tubing |
Stainless Steel 304H Welded Tube Features
Stainless Steel 304H is selected for applications requiring good corrosion resistance and improved mechanical strength at elevated temperatures.
- Good general corrosion resistance
- Improved strength at elevated temperatures
- Good resistance to oxidation
- Good creep and stress-rupture properties
- Good weldability
- Good formability
- Durable performance in demanding environments
- Suitable for high-temperature applications
- Good surface finish
- Available in various sizes and wall thicknesses
Stainless Steel 304H Chemical Composition
Stainless Steel 304H contains chromium and nickel as its principal alloying elements, with a controlled higher carbon content compared with Stainless Steel 304 and 304L. This composition contributes to its improved high-temperature strength.
| Element | Composition (%) |
|---|---|
| Chromium | 18.0 - 20.0 |
| Nickel | 8.0 - 11.0 |
| Carbon | 0.04 - 0.10 |
| Manganese | 2.00 max. |
| Silicon | 1.00 max. |
| Phosphorus | 0.045 max. |
| Sulfur | 0.030 max. |
| Nitrogen | 0.10 max. |
| Iron | Balance |
Stainless Steel 304H Mechanical Properties
Stainless Steel 304H provides a useful combination of tensile strength and elevated-temperature performance. Actual mechanical properties depend on product form, dimensions, heat treatment and applicable specification.
| Property | Minimum Requirement |
|---|---|
| Tensile Strength | 515 MPa min. |
| Yield Strength | 205 MPa min. |
| Elongation | 35% min. |
| Density | Approx. 8.0 g/cm³ |
Note: Mechanical requirements can vary according to product form, dimensions and applicable specification. Final values should be verified against the relevant material test certificate.
Stainless Steel 304H Welded Tube Applications
Stainless Steel 304H Welded Tubes are used in applications requiring good corrosion resistance, elevated-temperature strength and reliable performance in industrial process systems.
Heat Exchangers
Used in heat-transfer equipment operating under elevated-temperature conditions.
Petrochemical Plants
Used in process equipment and tubular systems exposed to demanding operating temperatures.
Chemical Processing
Used in process equipment requiring corrosion resistance and dependable high-temperature performance.
Power Generation
Used in selected process, heat-transfer and auxiliary systems operating at elevated temperatures.
Boilers & Process Equipment
Used in tubular components and equipment designed for elevated-temperature service.
Industrial Piping
Used in industrial piping and process systems requiring corrosion resistance and durable performance.
Industries Using Stainless Steel 304H Welded Tubes
Kamal Steels supplies Stainless Steel 304H Welded Tubes to industries requiring corrosion-resistant stainless steel tubing with reliable performance at elevated temperatures.
Petrochemical Industry
Used in process equipment and tubular systems operating under demanding temperature conditions.
Chemical Industry
Used in chemical process equipment requiring corrosion resistance and elevated-temperature performance.
Power Industry
Used in selected heat-transfer and process systems operating at elevated temperatures.
Heat Exchanger Industry
Used in heat-transfer equipment and tubular systems requiring reliable high-temperature service.
Engineering Industry
Used in industrial equipment, fabricated components and process systems.
Process Equipment Industry
Used in process equipment and piping systems requiring durable stainless steel tubing.
Frequently Asked Questions
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.