Y30 Free Cutting Steel Bar
Y30, Chinese name is low-sulfur phosphorus free cutting steel, high mechanical properties, machinability has been properly improved, can produce high strength standard parts.
● Features and Scope:
Its cutting performance is better than No. 30 steel, heat treatment process is basically the same, quench cracking sensitive quite a bit or less, according to the shape of the part, the complexity of the choice of quenching medium. For the manufacture of high strength non-heat treatment standard parts, can also be used to manufacture heat treatment pieces. Y30 processed into small parts, can be quenched and tempered to improve life expectancy.
● Chemical composition:
Carbon C: 0.27 ~ 0.35
Silicon Si: 0.15 ~ 0.35
Manganese Mn: 0.70 to 1.00
Sulfur: 0.08 ~ 0.15
Phosphorus P: ≤0.06
● Performance and application:
Low sulfur phosphorous composite easy to cut steel, high mechanical properties, workability than Y20 have been properly improved. Manufacturing requirements of non-heat treatment of high strength standard parts or heat treatment parts, small parts can be quenched and tempered.
● Mechanical properties:
Tensile strength σb (MPa): (hot rolled) 510 to 655; (cold drawn) Thickness or diameter of steel 8 to 20 hours: 600 to 825;> 20 to 30 hours: 560 to 765;
Elongation δ5 (%): (hot-rolled) ≥ 15; (cold-rolled) ≥ 6.0
Section shrinkage ψ (%): (hot-rolled) ≥25