Steel of high hardness for armour-plating, process for the manufacturing of this armour-plating and armour-plated products obtained

摘要

Steel of high hardness for armour plating, having the following chemical composition by weight: 0.4 to 0.7% of carbon, 0.3 to 1.5% of manganese, 0.1 to 2% of chromium, 0.5 to 1.5% of silicon, 1 to 5% of nickel, 0.2 to 1% of molybdenum, less than 0.015% of phosphorus, less than 0.005% of sulphur, the remainder being iron and residual impurities resulting from the melting of the substances needed for the production. …??The invention also relates to a process for producing such a steel.