Low parathion composite free cutting steel, high mechanical properties, machinability is also appropriate to improve manufacturability higher standard strength requirements.
● Features and Scope:
       Performance is better than the 30th cut steel, heat treatment process is basically the same, fairly or somewhat less sensitive to quenching crack, you can choose the shape of the part quenching medium degree of complexity. Requirements for the manufacture of non-heat-treated high strength standard parts, heat treatment can also be used to manufacture parts. When Y30 processed into small parts, which can be adjusted in order to improve the life quality of treatment.

● Chemical Composition:
Carbon C: 0.27 ~ 0.35
Si Si: 0.15 ~ 0.35
Mn Mn: 0.70 ~ 1.00
Sulfur S: 0.08 ~ 0.15
Phosphorus P: ≤0.06

● Properties and Applications:
Low parathion complex higher-cutting steel, mechanical properties, processability compared with Y20 appropriate improvements. Higher manufacturing requires strength non-heat treated or heat-treated pieces of standard parts, small parts can be quenched and tempered.

● Mechanical Properties:
Tensile strength σb (MPa) :( hot) 510 to 655; (cold drawn) steel thickness or diameter of 8 to 20 o'clock: 600 to 825;> 20 to 30: 560 - 765;> 30: 540 - 735
Elongation δ5 (%) :( hot rolled) ≥15; (rolled) ≥6.0
Reduction of area ψ (%) :( hot rolled) ≥25