COLD-ROLLED STEEL FOR DEEP DRAWING Russian patent published in 1995 - IPC

FIELD: ferrous metallurgy. SUBSTANCE: steel containing carbon, silicon, manganese, sulfur, phosphor, aluminum, chromium, nickel, copper, nitrogen, niobium, iron and additionally has titanium with the following amount of components, mas. % : carbon 0.003-0.15; silicon 0.005-0.02; manganese 0.05-0.2; sulfur 0.004-0.012; aluminum 0.015-0.06; chromium 0.005-0.04; nickel 0.004-0.03; copper 0.006--0.05; nitrogen 0.001-0.006; niobium 0.01-0.15; phosphorus (0.005-0.015) of (0.05-0.1)1.5 x sulfur + 3.43 x nitrogen+6 x carbon < titanium < 1.5 x sulfur+3.43 x nitrogen+10 x carbon, the balance, iron. Steel contains additionally boron 0.0005-0.005. EFFECT: increased elongation, higher coefficient of intrinsic elastic anisotropy and good adhesion of protective coatings to steel strip. 1 tbl