Product Standard: GB/T6728-2002, GB/T6725-2002, GBT3094-2000 JG 178-2005 ASTM A500 JIS G3466 GB/T3094-2000 (National Standard) Cold-Pressed Non-Circular Rectangular Tube

GB/T6728-2002 (National Standard) Structural Cold-Formed Hollow Section Steel

ASTM A500 (US Standard) Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rectangular Shape

EN10219-1-2006 (European Standard) Non-alloy and Fine-grained Cold-Formed Welded Hollow Section Structural Profiles

JIS G 3466 (Japanese Standard) General Construction Angular Rectangular Tubing

Seamless square steel tube materials: Q235, Q345 (16Mn), 20#, alloy steel, stainless steel.

Square and rectangular tube products are used for machinery and equipment, solar energy equipment, steel structures, automotive parts, bridge piles, guardrails, and ship interior structures.