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317L stainless steel is a lower carbon version of 317 stainless steel, which means it has better corrosion resistance and higher creep strength at high temperatures. It contains molybdenum, nickel and chromium as main alloying elements.

305 stainless steel is a common austenitic stainless steel containing chromium, nickel, and manganese. Chromium can combine with oxygen to form a dense oxide film to protect materials from corrosion. Nickel can improve the material's heat resistance and toughness while reducing its magnetism. Manganese can increase the strength and hardness of materials.

303 stainless steel is an austenitic, easy-cutting wear-resistant acid stainles steel containing sulfur and selenium respectively. It is used in situations where easy cutting and high surface finish are required.

302 stainless steel is an austenitic stainless steel containing 18% chromium and 8% nickel. Its chemical composition depends considerably on reasonable alloy design to achieve a series of excellent properties.

301 stainless steel is an austenitic stainless steel with 17 percent chromium and 7 percent nickel, ensuring good strength and ductility when cold worked. Besides, it also has excellent corrosion resistance properties.

202 stainless steel is one of the 200 series of stainless steel, which is a stainless steel featuring low nickel content and high manganese content, because it is a stainless steel developed to save nickel, so its nickel content is relatively low.

321 stainless steel is an austenitic stainless steel of excellent corrosion resistance at room temperature, as well as good high-temperature strength and creep resistance.

440C stainless steel is a high carbon martensitic stainless steel with high strength, moderate corrosion resistance, and good hardness and wear resistance. It is capable of attaining the highest strength, hardness and wear resistance of all the stainless alloys after heat treatment.

201 stainless steel is the steel that is resistant to the corrosion of weak media such as atmosphere, steam and water, while acid resistant steel refers to the steel that is resistant to the corrosion of chemical corrosive media such as acid, alkali and salt.