321 stainless steel is a Ni-Cr-Ti type austenitic stainless steel, which has abrasion resistance, high temperature resistance, creep resistance, etc., and is used to manufacture wear-resistant acid containers and linings for wear-resistant equipment, and conveying pipelines.

304L stainless steel, also known as ultra-low carbon stainless steel, is a versatile stainless steel material that is widely used in the production of equipment and parts that require good comprehensive properties (corrosion resistance and formability).

304 stainless steel is a common material in stainless steel, with a density of 7.93 g/cm³; It is also known as 18/8 stainless steel in the industry, which means that it contains more than 18% chromium and more than 8% nickel; High temperature resistance of 800°C, with good processing performance and high toughness

303 stainless steel is an austenitic type of easy-cutting stainless and wear-resistant acid steel containing sulfur and selenium respectively, which is used in occasions that require easy cutting and high surface finish.