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


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