Easy to cut steel steel ----- Y15 Y15 is cutting structural steel, good accuracy, easy cutting, greatly improve tool life and reduce processing time. Is S-P composite sulfur, low silicon cutting steel. Cutting significantly higher than Y12, productivity increased by 30 to 50% higher than Y12 steel, especially when tapping, tap life than Y12 raise more than twice, and the ratio of imports Pb-S composite carbon free cutting steel 12L14 or 9SMn23Pb of tapping the effect of doubling. Manufacture of standard parts unimportant, such as bolts, nuts, fittings, spring seat and so on.