Views: 1 Author: Site Editor Publish Time: 2024-08-15 Origin: Site
The main difference between 304 and 316 stainless steels is their chemical composition, corrosion resistance and use:
1. Chemical composition: The chromium content of 304 stainless steel is higher than that of 316 stainless steel, while the nickel content of 316 stainless steel is higher, in addition, the molybdenum element is also added to 316 stainless steel. The composition of 304 stainless steel is mainly iron, containing 18% chromium and 8% nickel, while 316 stainless steel has added molybdenum element to the composition.
2. Corrosion resistance: The corrosion resistance of 316 stainless steel is stronger than that of 304 stainless steel, especially in chlorine-containing environments, 316 stainless steel performs better. 304 stainless steel performs well in freshwater applications or tap water and purified water applications.
3. Use :304 stainless steel is usually used in household appliances, food processing equipment and auto parts, while 316 stainless steel is widely used in pharmaceutical, biotechnology, medical equipment and food industry, areas with high requirements for health conditions.
4. Price: The price of 316 stainless steel is higher than 304 stainless steel, which is due to the addition of molybdenum element in 316 stainless steel.
Chloride ions are widely present, such as salt, sweat, sea water, sea breeze, soil and so on. Stainless steel in the presence of chloride ions in the environment, corrosion quickly, even more than ordinary mild steel, chloride ions and alloy elements in the Fe to form a complex, the Fe positive potential is reduced, and then oxidized by oxidizing agents to take away electrons.
Therefore, there are requirements for the use of stainless steel environment, and it is necessary to wipe frequently, remove dust, and keep clean and dry.
316 and 317 stainless steels are molybdenum containing stainless steels. The molybdenum content in 317 stainless steel is slightly higher than 316 stainless steel. Because 316 stainless steel contains molybdenum, the overall performance of the steel is better than 310 and 304 stainless steel, under high temperature conditions, when the concentration of sulfuric acid is lower than 15% and higher than 85%, 316 stainless steel has a wide range of uses. 316 stainless steel also has good resistance to chloride erosion, so it is usually used in Marine environments.
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