In fact, different kinds of stainless steel is just different alloying elements added to it, so as to have some of the characteristics we need, 316 stainless steel is the same, when 304 stainless steel certain properties can not meet our needs will be developed 316. xiyouwu stainless steel is mainly done 201 and 304 stainless steel tube, that 304 and 316 what is the difference between the analysis of the bar together today!
1.grade issue. 304 and 316 in the extension of 304L and 316L, respectively, their respective grades are as follows:
304 is 06Cr19Ni10, 304L is 00Cr19Ni10;
316 is 0Cr17Ni12Mo2, 316L is 00Cr17Ni14Mo2.
2. The problem of alloying elements.
304 and 316 material content comparison table
3. Food grade problem.
Often encountered people will ask that 304 is not food grade? In fact, according to the material to the word 304 material content to reach the food grade, the market is common food-grade material is about three: 304, 316 and 430 stainless steel. 304 is common in our small household appliances or cups of water, 316 some used in medical equipment, 430 is often used to do cutlery stainless steel material. But here also want to clarify a concept, not that the material is food-grade he is food-grade, but also includes manufacturing and other aspects of whether to achieve food-grade standards, like Xiyuowo is to do decorative stainless steel tubes, and will be another stainless steel pipe factory is specializing in the production of food-grade stainless steel water pipe, the requirements of the process is different.
4. Corrosion resistance issues.
316 stainless steel is 304 stainless steel in the resistance to pitting corrosion on the addition of some more molybdenum produced stainless steel. In various types of water quality (distilled water, drinking water, river water, boiler water, etc.), 304 stainless steel and 316 stainless steel corrosion resistance is almost the same, but when the medium of chloride ions in the content is very high, 316 stainless steel is more suitable.
5. Price.
Because of the molybdenum and nickel elements added in 316, 316 stainless steel is more expensive than 304 stainless steel.
6. Low carbon problem.
304L and 316L two kinds of material is relative to the 304 and 316 carbon content is lower, material content table also has a clear comparison. Stainless steel does not rust is mainly formed on the surface of the layer of chromium-rich oxide film, but when the temperature is too high will produce intergranular corrosion, so the 304L and 316L inside the carbon content is less, it reduces the intergranular corrosion. It should be noted that the higher susceptibility to intergranular corrosion does not mean that non-low carbon content is more susceptible to corrosion, when in a highly chlorinated environment, this susceptibility is also higher.