Easy to cut steel steel ----- Y15 Y15 cutting steel, precision, easy cutting, greatly improve tool life, reduce processing time. SP composite high-sulfur, low silicon cutting steel. Cutting significantly higher than the Y12, production efficiency than Y12 steel increased by 30 to 50%, in particular, tapping, tap life than Y12 more than triple than imports, the Pb-S complex of low-carbon free-cutting steel 12L14 or 9SMn23Pb, tapping the effect of doubling. Manufacturing is not important standards, such as bolts, nuts, fittings, and spring seat. 

 Y15 for cutting steel, by improving the content of sulfur and manganese in steel to form manganese sulfide inclusions, easily disconnect the cutting iron, can improve part surface quality, and faster cutting speed and The deeper the amount of feed processing, thereby enhancing production efficiency and reduce production costs. Low carbon free cutting steel is mainly used to make a strength less demanding, but the roughness of the higher parts, such as screws, screw, nut, pipe joints and connecting bolts. Of carbon free cutting steel Y35 can be used for higher intensity, and the easy processing of parts, such as textile machines, computer parts. Low-carbon free-cutting steel is generally used in hot-rolled or cold drawn state, can also be surface carburization treatment; of carbon free cutting steel is generally used after heat treatment. 

 C :0.10-0 .18 
 P :0.05-0 .10 S :0.23-0 .33 Mn :0.80-1 .20 Si: ≤ 0.15