Stainless steel round bar belongs to the category of long products and also belongs to the category of bars. The so-called stainless steel round bar refers to a long product with a uniform circular cross section, generally about four meters long. It can be divided into smooth round and black bar. The so-called smooth round refers to a smooth surface that is processed by quasi-rolling; while the so-called black bar refers to a rough black surface that is directly hot-rolled.