We can offer accurate Material List for your reference. In our Material List, you can clarify the chemical composition contained in steel pipes such as carbon, silicon, manganese, sulfur, as well as phosphorus. The proportion of these elements is different because of the different product materials or grades from customers. Apart from essential raw materials, the property of products you purchased is also apparent like tensile strength. You should take this factor into consideration when putting our products into application. Of course, if you want to know more information in the Material List, you can put forward your advice and we will exert great effort to satisfy your demands.