Cold-drawn round steel bar, also known as cold-drawn round steel, cold-drawn element steel, cold-drawn round steel, and smooth round steel, is a kind of cold-drawn section steel. Whether it is cold drawn round steel or round steel, its shape is round, but the surface of cold drawn round steel is very smooth, its dimensional accuracy is high, and its mechanical properties are high. Because of its high dimensional accuracy, it can be used directly without processing.