STEEL Russian patent published in 1998 - IPC

FIELD: metallurgy, in particular, devising of economically alloyed high-strength steel for manufacture by cold stamping of parts operating under conditions of impact-dynamic loads. SUBSTANCE: steel contains additionally calcium with the following amount of components, wt.-%: carbon, 0.40-0.45; manganese, 0.50-0.70; silicon, 1.50-1.70; chromium, 1.00-1.40; nickel, 1.10-1.45; molybdenum, 0.35-0.50; calcium, 0.003-0.010; iron, the balance. EFFECT: higher adaptability to manufacture of parts by cold stamping and forging; improved operating reliability. 1 tbl