In a method of manufacturing composite sheet steel of maraging steel, wherein the composite sheet steel comprises an outer layer and an inner layer, wherein the outer layer is harder than the inner layer and the inner layer is more tenacious than the outer layer, the steel of the inner layer is produced with a chemical composition containing in percent by weight: C.ltoreq.0.01, Si.ltoreq.0.1, Mn.ltoreq.0.1, P.ltoreq.0.005, S.ltoreq.0.005, Cu.ltoreq.0.1, Mo 4.80 to 5.20, Ni 17.5 to 18.5 , Cr.ltoreq.0.1, Ti 0.55 to 0.70, Co 8.0 to 9.0; and the steel of the outer layer is produced with purification in a zone melting process with a chemical composition containing in percent by weight: C.ltoreq.0.01, Si<0.1, Mn 0.02 to 0.20, P.ltoreq.0.005, S.ltoreq.0.005, Cu 0.01 to 0.20, Mo 4.80 to 5.20, Ni 17.5 to 18.5, Cr 0.01 to 0.20, Ti 1.80 to 1.95, Co 14.0 to 15.5, Al 0.05 to 0.15, with the remainder being Fe and contaminants resulting from the manufacturing process, respectively. The composite sheet steel is used as a protection against shots and the effect of explosives.

В методе изготовлять составную сталь листа maraging стали, при котором составная сталь листа состоит из наружного слоя и внутреннего слоя, при котором наружный слой более трудн чем внутренний слой и внутренний слой tenaciousee чем наружный слой, сталь внутреннего слоя произведена при химическийа состав содержа in percent весом: C.ltoreq.0.01, Si.ltoreq.0.1, Mn.ltoreq.0.1, P.ltoreq.0.005, S.ltoreq.0.005, Cu.ltoreq.0.1, mo 4.80 до 5.20, ni 17.5 до 18.5, Cr.ltoreq.0.1, ti 0.55 до 0.70, co 8.0 до 9.0; и сталь наружного слоя произведена с очищением в процессе зоны плавя при химическийа состав содержа in percent весом: C.ltoreq.0.01, кремний