STEEL FOR ROLLED METAL AND METAL SCRAP CUTTING Russian patent published in 2011 - IPC C22C38/54 

FIELD: metallurgy.

SUBSTANCE: steel contains carbon, silicon, manganese, nickel, chromium, vanadium, tungsten, calcium, copper, boron, phosphorus, sulphur and iron at following ratio of components, wt %: carbon 0.23 - 0.35, silicon 0.95 - 1.1, manganese 0.6 - 0.7, chromium 0.8 - 0.95, nickel 0.9 - 1.1, vanadium 0.05 - 0.15, tungsten 0.6 - 0.75, calcium 0.001 - 0.35, copper 0.005 - 0.18, boron 0.001 - 0.01, phosphorus 0.001 - 0.005, sulphur 0.01 - 0.005, iron - the rest.

EFFECT: increased long-term strength of knives at cutting cold and hot rolled metal and metal scrap.

1 tbl