Both stainless steel 321 and stainless steel 304 are common stainless steel materials. There are some differences between stainless steel 321 and stainless steel 304 in terms of composition, performance and use.
chemical composition
Stainless steel 321 contains 5 times the carbon content of titanium, while stainless steel 304 does not contain titanium. In addition, the chromium and nickel contents of stainless steel 321 are relatively high, 17-19% and 9-12%, respectively, while the chromium and nickel contents of stainless steel 304 are 18-20% and 8-10.5%, respectively.
High temperature performance
Stainless steel 321 is more stable at high temperature than stainless steel 304. At a high temperature of 800 to 1500 degrees Celsius, stainless steel 321 can still maintain good oxidation resistance and corrosion resistance, while the performance of stainless steel 304 will be affected.
Corrosion resistance
Although stainless steel 321 and stainless steel 304 are stainless steel materials with good corrosion resistance, in some special corrosive environments, there are differences in the corrosion resistance of stainless steel 321 and stainless steel 304. For example, in nitric acid with a concentration greater than 65%, stainless steel 304 will be corroded, while stainless steel 321 can resist this corrosion.
Application field
Due to the high temperature resistance of stainless steel 321, it is usually used in pipelines, storage tanks, heaters, automobile exhaust pipes and other applications in high temperature environments. Stainless steel 304 is usually used in the manufacture of kitchen equipment, tableware, decorations, medical equipment and other applications.
In general, although stainless steel 321 and stainless steel 304 are excellent stainless steel materials, due to differences in composition and performance between stainless steel 321 and stainless steel 304, it is necessary to pay attention to the characteristics of stainless steel 321 and stainless steel 304 when choosing in different application fields. Features and scope of application.
