Elements affect the performance of steel

　　(2) sulfur; is the steel of harmful debris, a higher sulfur content of steel for pressure processing at high temperatures, easy to rattle, often called hot shortness.

　　(3) P; make the plasticity and toughness of steel decreased significantly, particularly at low temperatures is more serious, a phenomenon called cold brittleness.In the high-quality steel, sulfur and phosphorus must be strictly controlled.But on the other hand to see, in low carbon steel with high sulfur and phosphorus, can easily cut them off, to improve the machinability of steel can be beneficial.

　　(4) manganese; can increase the strength of steel, can weaken and eliminate the adverse effects of sulfur, and can increase the hardenability of steel, high manganese content of high-alloy steel (high manganese steel) has a good abrasion resistanceand other physical properties

　　We have adopted advanced production equipment and technologies to manufacture our weleded steel pipe and oil pipe, which can not only improve product quality, but also save raw materials. Our products have high strength, good toughness and resistance to corrosion.