The density of 304 stainless steel is 7.93 g/cm3 and the austenitic stainless steel generally uses the value. The chromium content of 304 is 17.00-19.00 (%) and nickel content is 8.00-10.00 (%), which is equivalent of 0Cr19Ni9 (0Cr18Ni9) stainless steel of our country. The 304 stainless steel is a versatile stainless steel material, whose rust-proof performance is stronger than the 200-series stainless steel. The temperature resistance of 304 stainless steel plates is also relatively good. The 304 stainless steel has excellent corrosion resistance and good resistance to intergranular corrosion. For oxidizing acids, we learn from the experiment: in the nitrate with ≤ 65% concentration below the boiling temperature, 304 stainless steel has strong corrosion resistance. It also has good corrosion resistance to alkali solution and most organic and inorganic acids.
General characteristics of the 304 stainless steel plates: 304 stainless steel plate surfaces are beautiful and the possibility of using is diversified Good corrosion resistance, more durable than ordinary steel High strength, and thus the usage possibility of the 304 stainless steel tubes is large High temperature and oxidation resistant, high strength and resistance to fire Room temperature processing, easy for plastic processing Simple for maintenance because it doesn't need to do surface treatment Clean, high finish Good welding performance.
The difference between 316 and 304 stainless steel
Now the two most commonly used stainless steel is 304 and 316 (or corresponding to the German / European standard is 1.4308 and 1.4408). The most important distinction of 316 and 304 in the chemical composition is the 316 has Mo, and it is generally accepted that the corrosion resistance of 316 is better, which is more resistant to corrosion in high temperature environments that 304. Therefore, under high temperature environment, the engineer will generally choose 316 material parts. But things are not absolutely, in the concentrated sulfuric acid environment, it’s better not use 316 no matter how high the temperature is. Otherwise, this may make a big. The people who studied mechanical engineering have learned about the thread, remember that you need to smear a dark solid lubricant molybdenum disulfide (MoS2) in order to prevent thread being killed in a high-temperature. So there is no any kind of stainless steel is invincible super corrosion resistance. After all, stainless steel is an impurity with more steel (although these impurities are more corrosion resistant than steel), so it will react with other substances since it is steel.
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