HOT-ROLLED SHEET/STRIP OF 30CrMo STEEL AND METHOD OF THEIR PRODUCTION Russian patent published in 2024 - IPC C22C38/32 C22C38/38 C22C38/22 C22C38/20 C21D8/02 B22D11/06 

FIELD: metallurgy.

SUBSTANCE: invention relates to hot-rolled sheet or strip used as material for machine building, petrochemical industry, boiler building, dies for saw blades. Hot-rolled steel contains the following components, wt.%: C: 0.24–0.34, Si: 0.1–0.5, Mn: 0.6–1.5, P≤0.03, S≤0.007, Cr: 0.80–1.50, Mo: 0.10–0.30, N: 0.004–0.010, if necessary, B: 0.001–0.006, Als<0.001, total oxygen [O]_total: 0.007–0.020, one or both of Cu: 0.10–0.60 and Sn: 0.005–0.04, the rest is Fe and unavoidable impurities, wherein Mn/S≥250.

EFFECT: rolled stock has homogeneous structure and required complex of properties.

13 cl, 5 dwg, 6 tbl