FIELD: ferrous metallurgy. SUBSTANCE: structural steel has, wt.-% C 0.35-0.45; Si 0.17-0.37; Mn 0.3-0.7; Cr 2-3; Ni 0.5-1.5; Mo 0.15-0.55; V 0.15-0.06; Al 0.02-0.06; M 0.02-0.04; Ca 0.005-0.01; Ti 0.001-0.01 and Fe the rest. Steel properties: σв 1230-1280 MPa, σт 980-1040 MPa, δ 21-22% j 54.5-55.5% KCV 1.1-1.3 mJ/m2, defect stability index is 0.32-0.40 that 28-60% above as compared with known steel. EFFECT: enhanced quality of steel. 1 tbl
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Authors
Dates
1995-07-25—Published
1990-11-22—Filed