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Precision Stainless Steel Strip Market

Aug 24, 2020

The two most commonly used stainless steels 304 and 316 (or 1.4308 and 1.4408 corresponding to German/European standards). The main difference in chemical composition between 316 and 304 is that 316 contains Mo, and it is generally recognized that 316 has better corrosion resistance. , It is more corrosion resistant than 304 in high temperature environment. Therefore, in high temperature environments, engineers generally choose 316 material components. But the so-called nothing is absolute, in a concentrated sulfuric acid environment, no matter how high the temperature is, never use 316! Otherwise, this matter may be a big deal. Anyone who learns machinery has learned threads. Remember that in order to prevent the threads from being seized at high temperatures, you need to apply a dark solid lubricant: molybdenum disulfide (MoS2). From it, you can get 2 points. The conclusion is not:

[1] Mo is indeed a high temperature resistant substance (do you know what crucible is used to melt gold? Molybdenum crucible!).

[2]: Molybdenum easily reacts with high-valent sulfide ions to form sulfides. Ha ha, so no stainless steel is super invincible and corrosion resistant. After all, stainless steel is a piece of impurity (but these impurities are more resistant to corrosion than steel^^). Steel can react with other substances.