Role of stainless steel clad plate component alloying elements generally pure metals have a relatively high plasticity, When the addition of other alloying elements, forming a single-phase solid solution also have good plasticity, such as iron-nickel alloy may form a continuous solid solution, and therefore the iron and Ni in any proportion, the alloy ductility are high. However, under conditions contain other elements, solid solution is formed between the non-dissolved or partially dissolved in a solid solution of a metal compound, the metal is reduced so that the plastic, so the poor ductility of the alloy plasticity than that of pure metal solid solution or single phase. l of iron (Fe): is an essential element of stainless steel clad metal plates; l chromium (Cr): ferrite formation is the main element, chromium combines with oxygen corrosion Cr2O3 can generate passive film is corrosion resistant stainless steel clad plate holding One of the basic elements, chromium content increased repair capacity can be increased steel passivation film, usually stainless chromium content must be at least 12%; l carbon (C): is a strong austenite forming elements, can significantly improve the strength of steel, while the corrosion resistance of carbon is also adversely affected; l nickel (Ni): the main austenite-forming element, can slow down the corrosion of stainless steel clad plate and grain growth during heating; l molybdenum ( Mo): is a carbide-forming elements, is extremely stable carbide is formed, can prevent the austenite grains during heating up, to reduce the thermal sensitivity of the steel, addition of molybdenum to make passive film more dense solid, order to effectively improve the corrosion resistance of stainless steel Cl-; l niobium, titanium (Nb, Ti): is a strong carbide forming elements, can improve the resistance to intergranular corrosion of steel. However, titanium carbide adversely affects the surface quality of the stainless steel clad sheet, and therefore the surface of stainless steel is generally higher by the addition of niobium to improve performance. l nitrogen (N): is a strong austenite forming elements, can significantly increase the strength of steel. But stainless steel aging cracking greater impact, so the use of stainless steel stamping to strictly control the nitrogen content. l phosphorus, sulfur (P, S): stainless steel clad plate harmful elements adversely affect the corrosion resistance of stainless steel and stamping of city.