These kinds of steel have very good cutting capacity in drilling, rotary and squeeze mechanical operation.
High quality and free cutting steel have a high feed rate, high cutting / drill rotation rate (to ensure the highest productivity), small cutting resistance (to assurance tool life), and has the characteristics is easy to clean metal shavings generated from the machine. A key feature of this type of steel is precise tolerances and can be guaranteed the surface quality.
The key element to makes such good processing performance is lead and fixed sulfur content. Except there must be carbon, the other elements is manganese, phosphorus, and silicon. By adding tellurium can enhance the mechanical rate.
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