Cold drawn steel pipes are steel pipes manufactured by passing hot-rolled mother tubes (seamless pipes or welded pipes) through a die and applying tensile force to plastically deform them. This cold drawing process achieves high dimensional accuracy (outer diameter, inner diameter, wall thickness), excellent surface quality, and improved mechanical properties such as tensile strength and yield point. They are particularly chosen for applications requiring strict tolerances or when thin-walled and long pipes are needed. Main applications include hydraulic cylinders and propeller shafts for automobiles, construction machinery, hydraulic and pneumatic equipment, and precision machine parts, making it an indispensable processing category as a material for high-performance components.