20# Seamless Square Tube
20# Seamless Square Tube
20# refers to a grade of carbon structural steel in the Chinese GB/T standard (equivalent to ASTM 1020 or DIN C22 internationally), indicating approximately 0.20% carbon content. It offers excellent weldability, moderate strength, and good machinability.
A 20# seamless square tube is a hollow structural section with a square cross-section, manufactured without welded seams from solid billets through hot extrusion or cold drawing processes. This seamless construction ensures uniform wall thickness, superior structural integrity, and no weak points along the entire length.
Key Characteristics:
Material: Low-carbon steel (20# / 1020 / C22)
Strength: Moderate tensile strength (~410 MPa), excellent ductility
Surface: Smooth finish, optional pickling, oiling, or phosphating
Dimensions: Customizable side lengths, wall thicknesses, and corner radii
Applications:Widely used in machinery frames, automotive chassis, agricultural equipment, furniture structures, and general fabrication where cost-effectiveness, reliable weldability, and balanced mechanical properties are required. It conforms to standards such as GB/T 3094, ASTM A500, or EN 10210 depending on market requirements.
Previous：no more
Next：Cold-Drawn Seamless Square Tube
