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Thick Wall Rectangular and Square Steel Tube is a heavy-duty structural steel product designed for applications requiring high strength, excellent rigidity, and reliable load-bearing performance. In the steel industry, rectangular and square tubes with wall thickness greater than 3mm are generally classified as thick wall tubes. Common wall thickness ranges from 4mm to 20mm, while ultra-thick specifications can reach 25mm to 50mm.

Zhongtian is a professional manufacturer in China specializing in Thin Wall Rectangular and Square Steel Tubes. These are cold-formed hollow steel sections with a standard wall thickness of ≤3 mm, and ultra-thin wall tubes with a wall thickness of less than 1.0 mm. The products are made from high-quality Q235B and Q355B steel, using high-frequency resistance welding and cold bending processes, and conform to standards such as GB/T 6728 and ASTM A500. As a trusted supplier, Zhongtian provides stable quality and customized solutions to global customers.