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What is a square tube?
As the name suggests, a square tube is a type of tube with a square shape. Many materials can form a square tube, which serves as a medium for various purposes and places. Most square tubes are made of steel pipes, including structural square tube, decorative square tube, and architectural square tubes.
Square tubes are divided into seamless and welded types. Seamless square tubes are formed by extruding seamless round tubes.
Material classification
Square tubes are divided into: plain carbon steel square tubes, low alloy square tubes.
1. Plain carbon steel is divided into: Q195, Q215, Q235, SS400, 20# steel, 45# steel, etc.
2. Low alloy steel is divided into: Q345, 16Mn, Q390, ST52-3, etc.
Production standard classification
Square tubes are divided into: national standard square tubes, Japanese standard square tubes, British square tubes, American standard square tubes, European standard square tubes, non-standard square tubes according to production standards.
Classification of cross-sectional shapes
Square tubes are classified by cross-sectional shapes:
1. Simple cross-sectional square tubes: square square tubes, rectangular square tubes.
2. Complex cross-sectional square tubes: flower-shaped square tubes, open-shaped square tubes, corrugated square tubes, special-shaped square tubes.
Surface treatment classification
Square tubes are classified by surface treatment: hot-dip galvanized square tubes, electro-galvanized square tubes, oiled square tubes, pickled square tubes.
Application classification
Square tubes are classified by application: decorative square tubes, square tubes for machine tools, square tubes for mechanical industry, square tubes for chemical industry, square tubes for steel structure, square tubes for shipbuilding, square tubes for automobiles, square tubes for steel beams and columns, and square tubes for special purposes.
Wall thickness classification
Square tubes are classified by wall thickness: extra-thick-walled square tubes, thick-walled square tubes, and thin-walled square tubes.