Products Description
Industries including modern precision machinery manufacturing, hydraulic systems, auto parts and bearing accessories set strict requirements on dimensional tolerance, inner and outer surface finish and mechanical uniformity of steel pipes. Traditional hot rolled steel tubes have low precision and surface defects, unable to satisfy precision assembly demands. Cold drawn steel tubes are processed by cold drawing technology, featuring high dimensional accuracy, smooth surface and stable mechanical properties. They can greatly reduce subsequent machining procedures and serve as core materials for precision manufacturing industry. This article details the production technology, advantages, applications and selection tips of cold drawn steel tubes.
Production Technology & Precision Features
Cold drawn steel tubes take hot rolled tubes as raw materials, and are processed through multiple cold drawing, annealing and finishing procedures. These processes thoroughly solve the problems of uneven wall thickness and rough surface of hot rolled tubes. The tolerance of outer diameter, inner diameter and wall thickness can be controlled within ±0.05mm. The inner and outer surfaces are smooth and burr-free with high dimensional consistency, fully meeting assembly standards of precision parts.
Main Applications & Industrial Value
Cold drawn steel tubes are most commonly used for hydraulic cylinders and air cylinder barrels. Their high-precision inner holes require no deep boring processing and can be assembled directly after chrome plating, which effectively simplifies production procedures and cuts manufacturing costs. Besides, they are widely applied to automobile transmission shafts, bearing rings, precision instrument parts, machine tool components and other products, improving finished product quality with stable performance.
Material Selection & Surface Treatment
Common materials include 20#, 45# and Q345B. 20# steel has good toughness, ideal for hydraulic accessories, while 45# steel features higher strength and is mainly used for structural parts. According to service scenarios, surface treatments such as pickling, phosphating and chrome plating can be adopted to realize rust removal, anti-rust, wear resistance and sealing functions, so as to meet service demands of different working conditions.
With ultra-high dimensional accuracy, superior surface quality and stable mechanical properties, cold drawn steel tubes are irreplaceable pipes in the field of precision machinery. Proper selection of materials, tolerance grades and surface treatment methods can maximize product advantages and help enterprises save costs and improve efficiency. We provide customized cold drawn steel tubes of various specifications. Feel free to contact us for communication if you have procurement needs or technical questions.