Stainless Steel 304/304L Welded Tubes Manufacturer & Supplier in India
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Midland Alloys Inc. is a reliable supplier and manufacturer of stainless steel 304/304L welded tubes. We provide high-quality austenitic tubes consisting of 18% chromium and 8% nickel, which offer corrosion resistance, structural strength, and a long service life in industrial systems. To ensure dimensional correctness and weld integrity, our stainless steel 304 and SS 304L welded tubes are manufactured in compliance with ASTM A358, ASTM A249, ASME standards, and ERW specifications. We provide these tubes in various sizes, wall thicknesses, and surface finishes, including pickled, annealed, and polished alternatives. Controlled welding methods and thorough inspection protocols ensure uniform strength and durability. Midland Alloys Inc., an ISO-certified manufacturer and exporter, maintains inventory in stock and provides complete documentation for global supply.
304 / 304L SS Welded Tubes Overview
Engineers require specific technical data before finalising the material requirements. SS 304 and SS 304L welded tubes are austenitic stainless steel materials extensively used for corrosion-resistant pipes, process systems, and structural applications. The key difference is in carbon content, grade 304 has a slightly higher carbon level, but 304L possesses a lower carbon level, hence reducing the risk of intergranular corrosion after welding and commonly eliminating the need for post-weld heat treatment. We produce stainless steel 304/304L welded tubing by longitudinal welding techniques, followed by solution annealing and non-destructive testing to verify weld integrity and dimensional precision. In comparison to seamless tubes, welded stainless steel tubes offer enhanced dimensional accuracy and cost-effectiveness, especially in larger diameters and thicker profiles. They are often used for industrial, commercial, and hygienic applications that require moderate pressure performance and enduring reliability.
Benefits of Welded 304 & 304L SS Tubes
Welded 304 and 304L tubes offer a practical balance of strength, corrosion resistance, and fabrication ease. For projects that do not require seamless pressure ratings, they provide dependable performance with measurable cost savings.
- Strong resistance to atmospheric and mild chemical corrosion
- Improved weldability, especially in the low-carbon 304L grade
- Stable mechanical strength under moderate pressure systems
- Good formability for fabrication and bending operations
- Smooth surface finish supports hygienic applications
- Available in wide diameter and thickness ranges
- Economical alternative to seamless tubes
- Consistent dimensional accuracy through controlled welding
SS 304/304L tubes are a go-to choice for general-purpose applications, providing excellent corrosion resistance, weldability, and affordability. Compared to SS 316, which contains molybdenum, 304/304L offers less chloride resistance but comes at a lower cost. SS 321 includes titanium for high-temperature stability but is less weld-friendly than 304L. SS 310 offers excellent high-temp performance but is more expensive. Duplex 202 is more difficult to machine, and form but it offers greater strength and superior resistance to harsh environments. The selection of the appropriate grade depends on the environment, mechanical stress, temperature exposure and cost.
Specification of Stainless 304 & 304L Welded Tubes
The specifications table below specifies our stainless steel 304/304L welded tube manufacturing standards, dimensional tolerances, and supply conditions.
Seamless Tube OD : 1/8 -12" NPS
ASTM /ASME SA269/A269
Welded
Round, Square, Rectangular, Hydraulic Etc
Single Random, Double Random, Standard & Cut length
Plain Ends (PE), Threaded Ends (TE), Bevelled Ends (BW), Grooved Mechanical Joints or Grooved Ends, TBE (Treaded Both Ends)
SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
No. 2B - Mill finish/ Matte finish, No.8 - Mirror finish, No. 4 - Brushed finish, Bright, Annealing, Polished, Mirror
Types of SS 304 / 304L Welded Tubes
In corrosion-prone areas, such as marine platforms, offshore pipes and chemical processing lines, SS 304/304L welded tubes provide reliable resistance to oxidation and moisture exposure. We produce these tubes by welded fabrication, ensuring consistent weld seams, regulated wall thickness, and reliable dimensional tolerances.
These pipes integrate corrosion resistance with ease of production, making them appropriate for structural frames, process piping, and architectural applications. We provide them in various forms to meet industrial and commercial needs.
Pipe Forms
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Round TubeFor structural and plumbing systems, standard cylindrical tubes are used.
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Square TubeUsed in load-bearing constructions, frames, and manufacturing.
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Rectangular TubePreferred for structural reinforcement and supports.
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Polished TubeA surface that has been mechanically polished for aesthetic or hygienic purposes.
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Industrial Process TubeDesigned for industrial plant fluid handling.
Contact us today to discuss how Stainless Steel 304/304L Welded Tubes can benefit your application. Whether you need guidance in selecting the right Tubes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | min. | – | – | – | – | – | 18.0 | – | 8.0 | – |
| max. | 0.08 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 | 0.10 | ||
Mechanical strength remains consistent through both grades, supporting structural and moderate-pressure applications.
| Mechanical Properties | |
|---|---|
| Tensile Strength Min | 75 ksi |
| Yield Strength Min | 30 ksi |
| Elongation Min in 2″ | 35% |
Stainless Steel Tubes Grades We Offer
Round Bar
Analytic
Cut to Length
Centering
Heating
Perforation
Inspection of Size
Pickling
Inspection of Surface
Lubricating
Cold Drawing (Cold Rolling)
Degreasing
Annealing
Straightening
Cut
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
Industrial Applications for SS 304 and 304L Welded Tubes
Stainless steel 304 and 304L welded tubes are essential components in various worldwide industries, including food processing and dairy, pharmaceutical plants, and chemical processing facilities. These tubes are highly regarded in oil and gas, water treatment, power generation, and architectural construction due to their high chromium-nickel content, which provides exceptional corrosion resistance in mildly corrosive or atmospheric environments. Their hygienic features make them the preferred choice for process piping and fluid transport in sterile environments, and their structural integrity allows for the production of heavy-duty frameworks, heat exchangers, and railings. Due to its low carbon content, the 304L type improves weldability and effectively prevents sensitisation during high-temperature joining. This welded construction is a less expensive alternative to seamless pipe that maintains durability and the convenience of production. As a result, engineers select these tubes for their reliable performance and long service life in various industrial applications.
Why Choose SS 304 / 304L Welded Tubes
SS 304 and 304L welded tubes are used in industrial and commercial applications, as they provide corrosion resistance, production flexibility, and consistent mechanical strength. The chromium-nickel composition prevents oxidation and chemical exposure, while the low-carbon variant maintains corrosion resistance after welding. These tubes can withstand temperature variations and moderate pressures while maintaining structural integrity. Long service life shortens maintenance cycles, which is essential in plant operations. When evaluating suppliers, B2B customers must ensure consistency in compliance, traceability, and inspection requirements. Midland Alloys Inc., an ISO-certified company, offers export-quality material with complete documentation, dimensional accuracy, and reliable delivery dates. Long-term projects benefit from a consistent supply.
FAQs
The key difference lies in carbon concentration. SS 304 has up to 0.08% carbon, and 304L is limited to 0.03%, which reduces the risk of intergranular corrosion after welding. Both have comparable strength and corrosion resistance; 304L performs better in welded and corrosive conditions.
SS 304 welded tubes may require post-weld heat treatment in critical corrosive applications to prevent carbide precipitation. SS 304L usually does not require heat treatment after welding due to its low carbon content, which minimises sensitisation. This makes 304L more convenient for fabrication-heavy projects.
Yes. SS 304/304L grades are commonly used in food processing and pharmaceutical industries due to their hygienic surface quality and corrosion resistance. As they are resistant to contamination, easy to clean, and meet conventional hygienic standards. Polished finishes improve the suitability for hygienic servicing.
The difference between carbon content in SS 304 and SS 304L is 0.08% and 0.03%.
