Welded Stainless Steel Square Tube Large Diameter Hollow Structural Section HSS
Large Diameter stainless steel square tube
,hollow structural welded square tube
,hollow structural Stainless Steel Square Tube
[Welded] Stainless Steel Large Diameter Welded Square Tube, hollow structural section (HSS)
Stainless steel welded square tube is a hollow structural section (HSS) manufactured by forming a flat stainless steel strip or coil into a square shape and welding the longitudinal seam. The result is a lightweight yet strong tubular product with a clean, uniform appearance. Welded square tubes are available in a wide range of sizes, from small 80 mm × 80 mm sections to large 1,000 mm × 1,000 mm sections, with wall thicknesses typically ranging from 3 mm to 20 mm.
Stainless steel welded square tubes offer a combination of strength, aesthetics, and cost-effectiveness that makes them a popular choice across many industries.
- Cost-Effective — Welded tubes are significantly more economical than seamless tubes, especially for large production volumes
- Wide Size Range — Available in square and rectangular shapes with side lengths from 80 mm to 1,000 mm and wall thicknesses from 3 mm to 20 mm
- Good Strength-to-Weight Ratio — The square shape provides excellent structural rigidity with relatively low weight
- Aesthetic Appeal — Clean, modern appearance with smooth surface finishes such as 2B, BA, No.4, HL, or mirror
The production of stainless steel welded square tube begins with a stainless steel coil that is unwound, leveled, and trimmed to the required width. The flat strip is progressively formed into a square shape through a series of forming rollers. Zhaotai offers multiple welding processes to meet customer needs, including submerged arc welding, laser welding, plasma welding, and manual welding. After welding, the tube passes through sizing rollers to achieve precise outer dimensions and straightness. The weld seam may be smoothed or left as is, depending on the finish requirement. The tube is then cut to length, and surface finishing (such as polishing or brushing) is applied as needed. Finally, the tube undergoes quality inspection before packaging and shipment.
201, 430, 304, 304L, 316, 316L, 310S, 317, 317L, 321, 904L, 2205, 2507, etc.
Mill Finish, Not Polished
Available surface finishes: polishing, sandblasting, brushed, embossing, painting, etc. Please contact us for inquiries.
- Side Length: 80 mm × 80 mm to 1000 mm × 1000 mm
- Wall Thickness: 3 mm to 20 mm
- Standard Length: 6m (20 ft), custom lengths available up to 12m (40 ft)
| Industry | Specific Applications |
|---|---|
| Construction & Architecture | Building frames, handrails, balustrades, staircases, curtain wall supports, canopies |
| Furniture | Table legs, chair frames, shelving systems, display racks, bed frames |
| Automotive & Transportation | Trailer frames, truck racks, bus handrails, vehicle roll cages, cargo barriers |
| Industrial Equipment | Machinery frames, conveyor supports, workbenches, equipment enclosures, safety guards |
| Food Processing | Hygienic equipment frames, conveyor rails, food-grade support structures, work tables |
| Agricultural | Greenhouse frames, animal enclosure panels, irrigation equipment supports, fencing |
| Medical | Hospital bed frames, medical cart structures, equipment stands, wheelchair components |
| Marine | Boat railings, dock structures, marine equipment frames, ladder rungs |
| Retail & Display | Store fixtures, display stands, shelving units, clothing racks, signage frames |
| General Fabrication | Gates, fences, frames for custom projects, structural supports, brackets, enclosures |
Stainless steel can be magnetic depending on its internal structure. Austenitic grades like 304 and 316 are normally non-magnetic, but ferritic (430) and martensitic (410) grades are magnetic due to their different crystal structure. Even 304 or 316 may become slightly magnetic after cold working such as bending or stamping, which transforms some austenite into martensite. Therefore, magnetism does not indicate quality — it simply reflects the steel's microstructure and processing history.
For standard materials and sizes held in stock, delivery is guaranteed within 3 days of payment receipt. For products requiring custom dimensions or surface finishes, the lead time is 7 to 15 working days after payment confirmation. Specific delivery schedules should be confirmed with customer service at the time of order placement.
A substantial inventory is maintained to ensure prompt delivery. Stock availability varies by material grade and dimensions. To avoid potential delays, please confirm current stock levels with your sales representative prior to placing an order.
Applicable product standards must be specified at the time of order. For projects with specific technical requirements, please provide detailed parameters, tolerance ranges, and other relevant specifications. A dedicated quality inspection department oversees all stages of production to ensure full compliance. Upon completion, accurate measurements, inspection images, video documentation, and material test reports are provided for customer confirmation.
Complimentary samples are available in any size; however, international shipping fees apply. These charges are deductible from future order payments following formal cooperation. Customized samples are also available for a fee. For further details, please consult your sales representative.
Custom markings on outer packaging are available upon request at no additional cost. Once the marking design is approved, it will be affixed using waterproof tape. If no specific marking is requested, packaging will be shipped without markings by default.
Material grade, dimensions, and other identifying information may be spray-marked directly onto the steel plate surface upon request. For applicable charges, please consult your sales representative.
Standard wooden pallet packaging is provided at no extra cost, with a loading capacity of 1 to 3 tons per pallet. Alternative packaging options, such as iron pallets, are available upon request. Please contact your sales representative for details — bulk orders qualify for preferential pricing.
We maintain partnerships with multiple freight forwarders to offer competitive land, air, and sea freight options. If you have a preferred freight forwarder, we can arrange delivery to your agent's warehouse or to the designated port of shipment.
Factory inspections and product inspections are fully supported. Customers are welcome to visit our facility for in-person inspections. Alternatively, third-party inspection agencies, including SGS, may be arranged to conduct on‑site inspections.
