抄録
Since the end of the War, spring steel has become one of the most important special steels in Japan.
In 1948, the production of spring steel amount to 29, 714 tons in the total amount of special steel production of 87, 136 tons. Meanwhile the level of quality of spring in Japan, may be lower than that of in America and in Europian countries. Therefore, for general reference, the auther collected here the various recent data of spring steel, such as the history, chemical composition, mechanical property, heat treatment, mass effect, cold working etc, which will be thought to be useful for manufacturing spring and spring-steel.
