Suao is a professional manufacturer of high-precision cold drawn steel tubes, hydraulic tubes, and mechanical structure tubes, integrating R&D, production, inspection, and global sales. We operate two major production facilities covering over 36,000 square meters, with more than 200 employees and an annual output of 50,000+ tons, supplying customers across major industrial markets worldwide. As Suppliers of Precision Cold-Drawn SS Tube – TP304, Ø50.8 x 2mm, ASTM A269, our integrated manufacturing capabilities include cold drawing, heat treatment, straightening, finishing, cutting, chamfering, and surface treatment. These are supported by a full range of advanced equipment for non-destructive testing, chemical analysis, and online dimensional monitoring—ensuring every tube meets stringent quality standards. We invest continuously in automation and smart manufacturing systems to enable flexible, high-mix, low-volume production. Custom Precision Cold-Drawn SS Tube – TP304, Ø50.8 x 2mm, ASTM A269. Our products are widely used in construction machinery, hydraulic systems, automotive parts, wind energy, shipbuilding, railways, and oil & gas sectors. Certified to ISO 9001, ISO 14001, CE, and RoHS standards, Hongli is more than a manufacturer—we are a trusted long-term partner for global industrial clients.
Established In
Employees
Export Country
Annual Production
You have ordered a batch of welded cold drawn tubes to EN 10305-2 for your hydraulic cylinders. When the first tubes arrive, the outer diameter passes on the gauge, but the inner diameter measures a few hundredths high....
A purchasing engineer sourcing barrels for a 160 mm bore dump-truck hoist cylinder gets two workable quotes in the same week: one drawn from E355, one from 20MnV6, with the 20MnV6 offer carrying a double-digit price pre...
Picture a production planner standing between two finishing lines for hydraulic cylinder tubes. One line uses honing; the other skives the bore and then roller burnishes it. Both can deliver a precise, smooth diameter, ...
A shock absorber tube order looked fine on paper: the material was listed as SPHC, the wall thickness was within range, and the price was attractive. But when the first batch arrived, the inner diameter measured outside...