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Which is better, 304 stainless steel sheet or 316 stainless steel sheet?

Which is better, 304 stainless steel sheet or 316 stainless steel sheet?

Time:2022-03-16 Source:WUXI JIANO SPECIAL STEEL CO.

When buying stainless steel products, it is recommended to use 304 stainless steel. 304 stainless steel is sufficient to make insulated cups without affecting health. When making 316 stainless steel technicians add 2% molybdenum to 304. The role of molybdenum is mainly to improve the high temperature strength and corrosion resistance of the alloy, as well as toughness, weldability. 316 stainless steel is also characterized by the absence of thermal expansion and cold shrinkage.

Which is better, 304 or 316 stainless steel? It depends on where you choose 304 and 316 stainless steel, what performance requirements there are, and how you choose the material for both. 304 is generally the commonly used stainless steel, but 316 is only used for special requirements. If you use 304 stainless steel food grade for daily life, you can use it. For chemical containers, 316 stainless steel can be used.

A, 304 and 316 chemical composition is different

304 stainless steel material composition of ocr18ni9,316l, austenitic stainless steel and oocr12mo2ti.

IMG_20210525_145954

Second, 304 and 316 have different properties

304 stainless steel can resist corrosion of sulfuric acid, phosphoric acid, formic acid, urea, etc. It is suitable for general water, controlled gas, wine, milk, CIP cleaning fluid and other corrosive small or not in contact with the material.

The addition of molybdenum in 316L stainless steel plate 304 can significantly improve its resistance to intergranular corrosion, oxide stress corrosion and reduce the tendency to weld thermal cracking. It also has good resistance to chloride corrosion. Commonly used in pure water, distilled water, medicine, soy sauce, vinegar and other places with high sanitary requirements and corrosive properties.

Three, 304 steel plate and 316 steel plate for different purposes

304 stainless steel plate: 18cr-8ni-0.08c, with good corrosion resistance, oxidation resistance and processability, strong oxygen acid resistance, stamping and forming, can be used in the manufacture of industrial containers, tableware, metal furniture, architectural decoration, railings, medical equipment, etc.

316 stainless steel: 18cr-12ni-2.5mo is commonly used in coastal construction, ships, nuclear power chemical, food equipment, watch accessories, pharmaceutical industry and surgical equipment. It not only improves the corrosion resistance of chemicals hydrochloric acid and seawater, but also improves the corrosion resistance of brine solutions.

In summary, 316 and 304 stainless steel are both austenitic stainless steel with good rust resistance and corrosion resistance. 316 and 304 stainless steel are generally suitable for food grade equipment, machinery and appliances after surface polishing, such as food and drug processing equipment, medical equipment, thermal cups, children’s tableware, etc.