In the selection process of mixing materials in contact with materials, "special materials" usually refer to other metal materials except conventional materials such as carbon steel and ordinary stainless steel, such as superalloy, titanium material, Monel, 904L, Hastelloy, zirconium, niobium, etc. special materials are widely used in high temperature and high corrosion conditions (such as hydrochloric acid, hydrofluoric acid, etc.). SEAN mixing equipment has accumulated rich experience in the processing and welding of special materials, and the product quality has been recognized by the majority of users.