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This article analyzes the mechanical properties of rolled plates made of shipbuilding steel of grade A32 with strength gradient across thickness. The microstructure of sheet across thickness varies from ferrite–bainite to ferrite–pearlite pattern. This leads to formation of a steel strength gradient. It has been demonstrated that the ratio of the strength gradient directions influences the applied force upon static bending and bullet resistance. [ABSTRACT FROM AUTHOR]

The effect of inoculating a high-strength shipbuilding steel with flux-cored wires containing FeCa and FeCa in a complex with rare-earth metals (REMs) on the distribution, composition, and morphology of nonmetallic inclusions is investigated. It is shown that inoculation with both FeCa and FeCa in combination with REMs with the calcium and cerium content of the metal within 0.002-0.003% for each of them allows obtaining a high-strength shipbuilding steel with a low level of contamination by nonmetallic inclusions. [ABSTRACT FROM AUTHOR]