24 July 2021 Free-Cutting Steel Bar
Y15 Free Cutting Steel Bar
Y15 is free cutting steel, precision, easy to cut. Can greatly improve the life of the tool, reduce processing time. Y15 free-cutting steel is S-P composite high-sulfur, low-silicon free-cutting steel. The machinability is significantly higher than that of Y12, and the production efficiency is 30-50% higher than that of Y12 steel. Especially when tapping, the tap life is more than twice that of Y12. It is often used in the manufacture of unimportant standard parts, such as bolts, nuts, and pipe joints. , Spring seat, etc.
Y15 is easy cutting structural steel, precision, easy cutting, greatly improving the service life of the tool and reduce the processing time. S-P composite high-sulfur, low-silicon free-cutting steel. The machinability is obviously higher than that of Y12, the production efficiency is increased by 30-50% compared with that of Y12 steel, especially when tapping, the life of the tap is more than twice as that of Y12, and more than that of the imported Pb-S composite low carbon free cutting steel 12L14 or 9SMn23Pb Tapping doubled. Made of non-important standard parts, such as bolts, nuts, fittings, spring seat and so on.
Y15 is easy-cutting structural steel, by increasing the content of sulfur and manganese in steel, forming a large amount of manganese sulfide inclusions, cutting iron filings easily disconnected, can improve the surface quality of parts, and can be faster cutting speed and Deeper feed rate processing, thereby increasing production efficiency and saving production costs. Low-carbon free-cutting steel is mainly used to manufacture the parts that require less strength but have higher roughness requirements, such as screws, screws, nuts, fittings, connecting bolts and so on. Carbon free cutting steel Y35 can be used for high strength, and not easy to process parts, such as textile machines, computer parts. Low-carbon free-cutting steel is generally used in the hot-rolled or cold-drawn state, but also surface carburizing; carbon free cutting steel is generally used after heat treatment.
Chemical Composition:
C: 0.10～0.18
Si: ≤0.15
Mn: 0.80～1.20
S: 0.23～0.33
P: 0.05～0.10
Mechanical Properties:
Tensile strength σb (MPa): (hot rolled) 390～540; (cold drawn) steel thickness or diameter 8～20: 530～755; >20～30: 510～735; >30: 490～685
Elongation δ5 (%): (hot rolled)≥22; (cold rolled)≥7.0
Reduction of area ψ (%): (hot rolled)≥36
Hardness: (hot rolled)≤170HB; (cold drawn)152～217HB