Cold-Drawn Seamless Square Tube
Cold-Drawn Seamless Square Tube
A cold-drawn seamless square tube is a precision-engineered hollow structural section with a square cross-section, manufactured by drawing a hot-rolled seamless round tube through a series of dies and mandrels at room temperature. This process transforms the circular profile into a square or rectangular shape while simultaneously reducing wall thickness and improving dimensional accuracy.
Key Advantages:
Superior Dimensional Precision: Tight tolerances on side lengths, wall thickness, corner radii, and straightness—often within ±0.1 mm
Enhanced Surface Finish: Smooth, bright, and scale-free surface, eliminating the need for additional machining or grinding
Improved Mechanical Properties: Cold working increases tensile strength and yield strength through work hardening, while maintaining good toughness
Excellent Straightness: Minimal bow or twist, ideal for automated fabrication and assembly
Common Grades: Carbon steels (10#, 20#, 45#), alloy steels, and stainless steels (304, 316)
Applications: Precision machinery shafts, hydraulic cylinder barrels, automotive components, furniture frames, conveyor systems, and instrumentation structures where tight tolerances, smooth surfaces, and reliable mechanical performance are critical.
Standards: GB/T 3094, ASTM A513, EN 10305, JIS G3445
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