07MnNiMoDR is a low-alloy high-strength steel plate, belonging to the category of steel plates for pressure vessels, with excellent comprehensive mechanical properties and weldability. "07Mn" indicates that the steel plate contains approximately 0.7% manganese (Mn), "Ni" represents the presence of nickel (Ni), "Mo" refers to molybdenum (Mo), and "DR" typically denotes that it has undergone double normalized treatment to enhance its impact toughness.

In the chemical composition of this steel plate, manganese improves the strength and hardness of the steel, nickel enhances low-temperature toughness and corrosion resistance, while molybdenum helps improve the steel's thermal strength and resistance to hydrogen-induced cracking. The 07MnNiMoDR steel plate undergoes special heat treatment processes, such as controlled rolling and double normalized treatment, to achieve fine grains and a uniform microstructure, thereby ensuring high strength and good toughness of the material.

07MnNiMoDR steel plates are widely used in industries such as petroleum, chemical, power station boilers, and pressure vessels, particularly suitable for manufacturing equipment that withstands high pressure and temperature, such as reactors, heat exchangers, and boiler shells. Their excellent mechanical properties and weldability make them an important material choice in these application fields.