27SiMn alloy tube

27siMn alloy tube, 27simn seamless steel tube=27 silico-manganese seamless steel tube, is one of the materials of seamless steel tube, the carbon content is between 0.24-0.32%, simn is listed separately because of the five major elements (carbon C, silicon Si, manganese Mn, phosphorus P, sulfur S), the high content of silicomanganese is about 1.10-1.40%.