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Transmission shafts are carbon steels with round cross-section and different diameters, produced from stainless steel by cold drawing method. It can be found in grades such as s235jr (st37-2) , s275jr (st44-2) and s355j0 (st52-3).

The steels that are molded and formed at room temperature are called transmission steel or cold drawn steel. With the cold drawing process, it is aimed to increase the yield and tensile strength of the material without the need for heat treatment. In order to improve the mechanical properties of hot rolled steel sheet materials by thinning, rolling at room temperature is applied instead of drawing, such materials are called cold rolled steel. Because transmission steels contain low carbon, their welding ability is high, and due to this feature, they are preferred in many parts such as machinery, automotive, transmission shaft, which require welding.

For some applications, the mechanical properties and surface conditions of hot rolled steel bars are not suitable. In accordance with such situations, cold rolled steel bars with improved properties are produced by applying cold processes to previously hot rolled steel bars.