FIELD: metallurgy. SUBSTANCE: steel has the following composition, wt. -%: carbon - less 1.2; silicon - not above 2; manganese - not above 2; chrome 10.5-19; sulfur - not above 0.55; calcium - not less 32 x $$$; oxygen - not less 70 x $$$, and iron - the rest. Ratio of calcium : oxygen = 0.2-0.6. To obtain martensite structure steel is subjected for thermic working by hardening. EFFECT: improved quality of steel. 8 cl, 2 dwg, 9 tbl
