STEEL

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FIELD : iron and steel metallurgy.SUBSTANCE : steel has the following composition, mas.% : carbon 0.16-0.24; silicon 0.15-0.25; manganese 0.3-0.8; chromium 1.0-2.0; nickel 1.5-2.5; vanadium 1.0-2.0; REM (rare earth metals) 0.08-0.12; titanium 0.2-0.6; boron 0.1-0.2; zirconium 0.8-1.2; iron - the rest.EFFECT : upgrading of strength.1 tbl