STRUCTURAL STEEL

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FIELD : metallurgy.SUBSTANCE : steel contains the following, wt % : carbon 0.05-0.65; silicium 0.15-0.25; manganese 0.5-1.0; nickel 1.5-2.5; chrome 1.5-2.5; molybdenum 5.0-7.0; vanadium 2.3-2.9; zirconium 1.5-2.5; rare-earth metals 0.15-0.25; niobium 0.2-0.4; tungsten 1.5-2.5; boron 0.1-0.25; indium 0.1-0.15; copper 1.2-1.7; iron - the rest.EFFECT : increasing steel strength.1 cl, 1 tbl