Mechanical Structural Tube

Stainless steel tubing for mechanical structures, equipment frames, supports, fabrication parts and construction components.

Typical Applications

Mechanical structures, equipment frames, supports, construction components, handrails, fabrication parts and engineering project supply.

Specification Range

Grades201, 304 stainless steel pipe, 304L, 316 stainless steel tube, 316L; selected by strength, environment and budget.

Tube ShapesRound tube, square tube, rectangular tube and custom mechanical structural tube by drawing.

Outside DiameterCommon round tube range: Φ6mm-325mm; square and rectangular tube by side size, thickness and drawing.

FinishBA, 2B, brushed, polished, mirror finish or pickled finish; confirm visible side, welding and scratch-protection requirements.

DeliveryCut-to-length service, packing, mill test certificate, batch marking and overseas export packing available by order.

RFQ Notes

Please provide load environment, fabrication method, welding requirement, visible finish, length tolerance, packing method and project destination. For outdoor, salt-spray or chemical environments, 304 or 316 is usually preferred.

Procurement Guidance

Mechanical structural tube is usually purchased for fabrication efficiency, dimensional stability and surface consistency. Round tube, square tube and rectangular tube can all be used for frames and supports, but the best choice depends on welding layout, exposed sides, load direction, cutting method and the final appearance after assembly.

For repeat export orders, share drawings or a sample specification sheet whenever possible. Details such as corner radius, straightness, twist, polishing direction, end cut quality and bundle protection can decide whether downstream fabrication runs smoothly or needs extra sorting and rework.

If the tube will be powder coated, welded into frames or installed outdoors, note the planned surface treatment and exposure level before confirming the grade.