The Properties of High-speed Steel Derived from Magneic Iron Sand

The characteristic properties of steel are influenced by its derivation, namely the type of raw iron used and
the method of manufacture, as well as the working treat-ment which includes the hot and cold-working and heat treatment. Of these factors the quality of raw iron and
the choice of the manufacturing method have an especially important effect on the characteristics of the steel prod-uced. The Yasugi Works of Hitachi Ltd. has been engaged for
several decades in the study and manufacture of high-speed steel and high quality special steels of various types, using as the basis of its work the high grade magnetic
iron sand produced in the Izumo-Hoki area.