In addition, steel had a little molybdenum and titanium. Thus, the chemical composition of steel DS was characterized by a very reduced carbon content, an increased content of manganese and chromium and moderate silicon, nickel and copper. The mechanical characteristics of the steel ds were determined by the complex alloying of numerous components in small doses. The mechanical characteristics should have met the requirements for steel 52, namely, have a strength limit of 50-62 kg/mm2, a fluidity limit of 36 kg/mm2, relative lengthening of more than 20%.