316l Stainless Plate

316L stainless plate is a stainless steel material with high corrosion resistance and high temperature strength. The chemical composition contains elements, such as chromium, nickel and molybdenum, which can resist the corrosion attack of chloride and sulfate, and has excellent wear resistance, heat resistance and welding performance. It is widely used in chemical industry, marine engineering, medical equipment, food processing, paper making, shipbuilding, construction and other fields. Its common specifications are thickness 0.3-100mm, width 1000-2000mm, length 2000-6000mm.

 

When brown spots appear on the surface of stainless steel, people are surprised: "Stainless steel will not rust, and if it rusts, it is not stainless steel. It may be that there is something wrong with the quality of the steel." Misunderstanding. Stainless steel will rust under certain conditions.

Stainless steel has the ability to resist atmospheric oxidation, that is, it does not rust, and it also has the ability to resist corrosion in media containing acid, alkali and salt, that is, corrosion resistance. However, its corrosion resistance depends on the chemical properties of the steel itself. Composition, mutual state, use conditions and environmental medium type. For example, 304 has absolutely excellent corrosion resistance in a dry and clean atmosphere, but when it is moved to the seaside area, in sea fog containing a large amount of salt, It will rust soon, and 316 stainless steel is good. Therefore, it is not any kind of stainless steel that is corrosion-resistant and does not rust at any time.

The two most widely used stainless steels is 304 and 316L (or corresponding to the German/European standard 1.4308, 1.4408), the main difference of chemical composition between 316L and 304 is that 316L contains Mo, and it is generally recognized that 316L has better corrosion resistance , more corrosion resistant than 304 in high temperature environment. Therefore, in high temperature environments, engineers generally choose parts made of 316L materials. But the so-called nothing is absolute, in the concentrated sulfuric acid environment, do not use 316L no matter how high the temperature is! Otherwise, there will be a big problem. Anyone who studies mechanics has learned threads, and remember that in order to prevent the threads from being seized at high temperatures, a dark solid lubricant needs to be applied: molybdenum disulfide (MoS2), from which 2 points are drawn The conclusion is not: [1] Mo is indeed a high temperature resistant substance . [2]: Molybdenum can easily react with high-valent sulfur ions to form sulfide. So there is no one kind of stainless steel that is super invincible and corrosion-resistant. In the final analysis, stainless steel is a piece of steel with more impurities (but these impurities are more corrosion-resistant than steel), and steel can react with other substances.