Easy to cut steel steel ----- Y15 Y15 is cutting structural steel, good accuracy, easy cutting, greatly improve tool life, reduce processing time. S-P complex is high-sulfur, low-silicon cutting steel. Cutting significantly higher than Y12, Y12 steel to improve production efficiency than the 30 to 50%, in particular, tapping, tap life more than double than the Y12, and Pb-S than the combined imports of low-carbon free-cutting steel 12L14 or 9SMn23Pb of double tapping effect. Manufacture of standard parts is not important, such as bolts, nuts, fittings, spring seat, etc.
Chemical composition:
C :0.10-0 .18
P :0.05-0 .10
S :0.23-0 .33
Mn :0.80-1 .20
Si: ≤ 0.15
Mechanical properties
: Tensile strength σb (MPa): (hot) 390 - 540; (cold drawn) steel thickness or diameter of 8 to 20 hours: 530 ~ 755;> 20 to 30 hours: 510 ~ 735;> 30 hours: 490 ~ 685, elongation δ5 (%):( hot) ≥ 22; (cold) ≥ 7.0, section shrinkage ψ (%):( hot) ≥ 36
