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Cold drawn steel tube use specifications and hardness indicators
Nov 29, 2018

The Cold drawn steel tube is a whole steel pipe with a hollow section and no seam on the surface. Usually, the steel ingot or the solid pipe blank is perforated into a capillary tube, and then cold drawn. Cold drawn steel tube is a precision cold drawn seamless pipe for mechanical structure, hydraulic equipment with high dimensional accuracy and good surface finish. The use of precision seamless pipes to manufacture mechanical structures or hydraulic equipment can greatly reduce machining time, improve material utilization, and improve product quality.


In order to ensure chemical composition and mechanical properties, it is necessary to carry out hydrostatic testing, crimping, flaring, and flattening of Cold drawn steel tubes. Common product specifications include: 12mm 14mm 18mm 20 mm 25mm 28mm 30mm 32mm 35mm 38mm 40mm 42mm 52mm.


Hardness is a commonly used measure of the performance of Cold drawn steel tubes and refers to its ability to resist hard objects from collapsing surfaces. According to the test method and the scope of application, the hardness can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness, microhardness and high temperature hardness. Commonly used for pipes are Brinell, Rockwell and Vickers hardness.

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