Thick steel plates subjected to heat treatment are sheets in which their mechanical and physical properties have been enhanced through a precision thermal process. The heat treatment process involves steps such as heating, holding, and cooling, which aim to modify the microstructure of the steel, thereby improving its strength, toughness, hardness, and wear resistance. Heat-treated thick stainless steel plates are high-quality stainless steel sheets whose mechanical properties and corrosion resistance have been improved through thermal processing. Heat treatment processes such as annealing, quenching, and tempering can alter the microstructure of stainless steel, thereby enhancing its hardness, strength, and corrosion resistance. Stainless steel heat-treated thick plates are widely used in fields requiring corrosion resistance and high strength, such as chemical processing equipment, food processing facilities, medical devices, building structures, and automotive components.