Al Metal Special Metal Parts

Chemical composition of set screws

The following table contains information on the chemical composition of set screws per property class. Set screws shall be made of steel conforming to the requirements specified below. For property class 45H, other materials may be used provided that the torque test requirements are met.

¹⁾ Free-cutting steel may be used, with lead content 0.35% max., phosphorus content 0.11% max., and sulfur content 0.34% max.
²⁾ Case hardening is allowed in the case of square-head set screws.
³⁾Steel with lead content 0.35% max. may be used.
⁴⁾ Shall contain one or more of alloying elements chromium, nickel, molybdenum, vanadium or boron.

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