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Help CenterSquare Steel & Square Pipe，JIS G3466 SS400, STKR400, ASTM A500, ASTM A36, ASTM A618
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1. Product Overview
Square Pipe is a hollow square cross-section structural steel tube, also known as Steel Square Pipe. Hot Rolled Square Pipe is manufactured through professional hot rolling and forming technology with precise square section size, flat tube surface and neat right-angle edges. Different from round pipes and irregular profiles, Square Pipe features uniform wall thickness and stable structural symmetry, providing excellent plane bearing performance and assembly accuracy. Steel Square Pipe has strong overall rigidity and outstanding compression and bending resistance, not easy to deform under various static and dynamic loads.
Hot Rolled Square Pipe adopts high-purity raw materials and standardized rolling process, with dense internal structure and stable mechanical indexes. Square Pipe possesses excellent weldability, cutting, drilling and bending performance, which greatly facilitates secondary processing and on-site construction installation. Steel Square Pipe has wide industry adaptability and high cost performance. Hot Rolled Square Pipe supports large-scale spot supply and customized fixed-length, fixed-size processing, being a highly versatile structural steel pipe for modern engineering.
2. Applicable Standards
Chinese National Standard: GB/T 6728-2017 Cold-formed thin-walled steel sections, GB/T 3094-2012 Cold drawn shaped steel tubes
American Standard: ASTM A500, ASTM A36, ASTM A618
European Standard: EN10219, S235JR, S355JR
Japanese Standard: JIS G3466 SS400, STKR400
3. Main Material Grades
‑ Ordinary carbon Square Pipe: Q235B, SS400, S235JR (universal grade, stable performance, widely used in general structural engineering) ‑ Low-alloy high-strength Steel Square Pipe: Q355B, S355JR, A572Gr50 (high tensile strength, strong load-bearing capacity for heavy-duty structures) ‑ Structural standard Hot Rolled Square Pipe: STKR400, S275JR, suitable for overseas construction and mechanical support projects
4. Specification Parameters
‑ Side Size: 10mm×10mm ~ 500mm×500mm, complete conventional and large-size specifications in stock ‑ Wall Thickness: 1.2mm ~ 20mm, supporting thin-wall and thick-wall customized production ‑ Standard Length: 6m, 9m, 12m; customizable fixed length from 3m to 18m ‑ Delivery State: Hot rolled black surface, smooth tube body, neat right angle, no cracks, scratches or deformation defects ‑ Dimensional Tolerance: Strictly compliant with national and international standards for side length, wall thickness, straightness and section flatness ‑ Processing Service: Fixed-length cutting, bending, punching, welding, shot blasting, anti-rust painting and deep customized processing
5. Core Performance Advantages
Square Pipe has a standardized square cross-section with uniform stress distribution, providing excellent vertical compression and horizontal bending resistance.
Steel Square Pipe features high structural rigidity and good overall stability, effectively avoiding structural deformation under long-term load and external force impact.
Hot Rolled Square Pipe has stable mechanical properties, qualified yield strength and tensile strength, with good toughness and anti-fatigue performance.
Square Pipe has superior processing performance, easy for cutting, welding, bolt connection and bending molding, improving construction efficiency significantly.
Steel Square Pipe has flat surface and neat edges, ensuring high assembly accuracy and beautiful structural appearance after installation.
Hot Rolled Square Pipe has good weather resistance, adapting to indoor, outdoor, dry and humid conventional engineering environments with long service life.
6. Main Application Fields
Square Pipe is an indispensable hollow structural steel material in construction and machinery industries. Steel Square Pipe is widely used for building steel structure frames, factory workshop supports, curtain wall keels and engineering temporary supports. Hot Rolled Square Pipe is commonly applied in mechanical equipment bases, container accessories, municipal guardrails, stage brackets, logistics equipment frames and steel structure engineering projects. Square Pipe with high strength grades is suitable for large-span buildings and heavy-duty load-bearing structures, meeting diversified engineering construction demands.
7. Delivery & Packing
MOQ: Small batch retail for spot Square Pipe; bulk customized production for special sizes and processing requirements.
Delivery Cycle: 4‑8 working days for conventional stock Steel Square Pipe; 10‑20 working days for special specifications and deeply processedHot Rolled Square Pipe.
Packing: Standard seaworthy export packing, bundled with high-strength steel strips, equipped with moisture-proof and rain-proof protection, suitable for sea and land transportation, compliant with FOB, CIF, DAP and other international trade terms.
Quality Inspection: Equipped with original factory mill test certificate; support third-party professional testing such as SGS and BV to meet project bidding and acceptance standards.
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