Zibo Zhaotai Stainless Steel Co., Ltd.
| Payment Terms | L/C,T/T |
| Delivery Time | 3 working days, based on order specifications. |
| Packaging Details | Tie the reinforcement, or upon negotiation |
| Steel Grade | 201, 430, 304, 304L, 316, 316L, 310S, 317, 317L, 321, 904L, 2205, 2507, Etc |
| Trade Term | Ex-Work, FOB, CNF, CFR, CIF, Etc |
| Surface Finish | Bright; Available surface finishes: polishing, sandblasting, brushed, embossing, painting, etc. Please contact us for inquiries. |
| Side Length | 20 mm × 20 mm to 80 mm × 80 mm |
| Wall Thickness | 1.5 mm to 6.0 mm |
| Length | Standard length 6m (20 ft), custom lengths available |
| Model Number | Side Length: 20mm × 20mm to 80mm × 80mm; Wall Thickness: 1.5mm to 6.0mm |
| Certification | AISI, ASTM, GB, DIN, BS, JIS |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,T/T | Delivery Time | 3 working days, based on order specifications. |
| Packaging Details | Tie the reinforcement, or upon negotiation | Steel Grade | 201, 430, 304, 304L, 316, 316L, 310S, 317, 317L, 321, 904L, 2205, 2507, Etc |
| Trade Term | Ex-Work, FOB, CNF, CFR, CIF, Etc | Surface Finish | Bright; Available surface finishes: polishing, sandblasting, brushed, embossing, painting, etc. Please contact us for inquiries. |
| Side Length | 20 mm × 20 mm to 80 mm × 80 mm | Wall Thickness | 1.5 mm to 6.0 mm |
| Length | Standard length 6m (20 ft), custom lengths available | Model Number | Side Length: 20mm × 20mm to 80mm × 80mm; Wall Thickness: 1.5mm to 6.0mm |
| Certification | AISI, ASTM, GB, DIN, BS, JIS | Place of Origin | China |
| High Light | Hollow Structural stainless steel square tube ，HSS stainless steel square pipe ，Cross Section ss square pipe | ||
Stainless Steel Square Tube, hollow structural section (HSS) with a square cross-section
What is Stainless Steel Square Tube?
A stainless steel square tube is a hollow structural section (HSS) with a square cross-section. It is manufactured by forming a flat stainless steel coil or strip into a square shape and welding the longitudinal seam. Square tubes are available in a wide range of sizes, from small 20 mm * 20 mm sections to large 80 mm * 80 mm sections, with wall thicknesses typically ranging from 1.5 mm to 6 mm. They are commonly used for structural, architectural, and mechanical applications.
Why Choose Stainless Steel Square Tubes?
Stainless steel square tubes offer a high strength-to-weight ratio, excellent corrosion resistance, and a clean, modern appearance. The square shape provides superior structural rigidity and is ideal for frames, supports, and visible architectural applications. Compared to round tubes, square tubes are easier to join, mount, and fabricate into assemblies. They are cost-effective compared to seamless tubes and are easy to cut, weld, drill, and machine.
Process Overview
Stainless steel square tubes are produced through a roll-forming and welding process. First, a stainless steel coil is unwound, leveled, and trimmed to the required width. The flat strip is then progressively formed into a square shape through a series of forming rollers. The longitudinal seam is welded using TIG, laser, or high-frequency (HF) 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 annealed to relieve stress, cut to length, and surface finished (2B, BA, No.4, HL, or mirror) as required. Finally, a protective PVC film is applied to prevent scratches during handling.
201, 430, 304, 304L, 316, 316L, 310S, 317, 317L, 321, 904L, 2205, 2507, etc.
Application
| Industry | Applications |
|---|---|
| Construction & Architecture | Building frames, handrails, balustrades, curtain wall supports, staircases |
| Furniture | Table legs, chair frames, shelving systems, display racks, bed frames |
| Automotive & Transportation | Trailer frames, truck racks, bus handrails, roll cages, cargo barriers |
| Industrial Equipment | Machinery frames, conveyor supports, workbenches, equipment enclosures |
| Food Processing | Hygienic equipment frames, conveyor rails, food-grade support structures |
| 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 |
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.
Company Details
Business Type:
Manufacturer
Year Established:
2006
Total Annual:
30,000,000-40,000,000
Employee Number:
60~100
Ecer Certification：
Verified Supplier
Our Company: Zhaotai is a China-based international factory specializing in stainless steel products from 2006. With annual domestic distribution exceeding 30,000 tons, the company has established a reliable supply capacity and a stable sourcing network. Building on this strong domestic foundation, ... Our Company: Zhaotai is a China-based international factory specializing in stainless steel products from 2006. With annual domestic distribution exceeding 30,000 tons, the company has established a reliable supply capacity and a stable sourcing network. Building on this strong domestic foundation, ...
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