STEEL SPS-43 Russian patent published in 1998 - IPC

FIELD: metallurgy, particularly,making economically alloy highly strong steel for manufacture of cold stamped components. SUBSTANCE: steel SPS-43 comprises, wt. -%: carbon, 0.40-0.45; silicon, 1.55-1.75; manganese, 0.50-0.70; chromium, 1.00-1.35; nickel, 1.10-1.45; molybdenum, 0.35-0.50; 0.003- 0.010 calcium; titanium, 0.01-0.05; aluminium, 0.05-0.10; copper, 0.14-0.25; and iron, the balance. EFFECT: improved viscous plastic properties of steel after annealing and good processibility during cold stamping due to higher drawing coefficient. 2 tbl