Import Cold Drawn Steel Pipes, Din 2391, St52/St45 Bk — Buy in Bulk from Supplier in China

The product offered by Zhejiang Dingxin Steel Tube Manufacturing Co., Ltd. is a cold drawn steel pipe that conforms to DIN 2391 and is supplied in the ST52 BK and ST45 BK grades. The pipes are manufactured by cold drawing, a process that improves tensile strength and yield strength while maintaining dimensional accuracy. Key features listed by the supplier include high‑pressure resistance, corrosion resistance and precision dimensions that suit hydraulic and pneumatic systems. The description also notes that the pipes are suitable for automotive, construction and general manufacturing use.

Cold drawing refines the grain structure of the carbon‑steel base, delivering typical tensile strengths of 360‑500 MPa for ST52 and 340‑460 MPa for ST45. Industry practice for DIN 2391 pipes uses a standard wall‑thickness range of 2‑10 mm and an outer‑diameter tolerance of ±0.2 mm, although the supplier states tolerances of ±0.1 mm or ±0.5 mm on request. Typical surface finish is Ra ≤ 1.6 µm, providing smooth internal flow for hydraulic applications. The product is supplied in lengths that can be cut to the buyer’s requirement, with standard lengths of 3 m to 12 m offered by many manufacturers.

These pipes are most often purchased by OEMs that build hydraulic cylinders, pneumatic actuators and pressure vessels. Buyers such as automotive component makers, construction equipment manufacturers and plant engineers rely on the mechanical reliability of the ST52 and ST45 grades. The supplier mentions flexible minimum order quantities, FOB or CIF shipping terms and payment options that include L/C and T/T, all of which should be confirmed directly before placing an order.

Zhejiang Dingxin Steel Tube Manufacturing Co., Ltd. is located in the Liuli Industrial Zone, Haiyan County, Jiaxing, Zhejiang Province, China. The company is listed as an imported‑tier supplier with a harbor trust tier, although its response rate is currently shown as 0 % on the platform. The profile states that the firm holds ISO and SGS certifications, indicating compliance with recognised quality management standards.

The business focuses on manufacturing cold drawn steel tubes that meet DIN 2391 specifications, offering both ST52 and ST45 BK grades. Its catalogue highlights flexible minimum order quantities, standard seaworthy packaging and the ability to ship under FOB or CIF incoterms, but the listing does not disclose specific production capacity or lead‑time figures, which should be clarified with the supplier.