The difference between 304 stainless steel and austenitic stainless steel

What is stainless steel?

Stainless steel is the abbreviation of stainless acid-resistant steel. Steel that is resistant to weak corrosive media such as air, steam, water, etc. or has stainless properties is generally called stainless steel.

In daily life, 304 stainless steel is generally called 304 or 0Cr18Ni9 or 18/8. All stainless steels starting with 3 are austenitic stainless steels, so 304 stainless steel and austenitic stainless steel are father and son. 304 stainless steel is one of the materials of austenitic stainless steel. 304 stainless steel and austenitic stainless steel are widely used in industry, furniture decoration industry, food and medical industry.

Difference

Austenitic stainless steel and 304 stainless steel are both commonly used stainless steel materials. They are similar in many aspects, but there are some differences in other aspects. Let's take a look at the difference between austenitic stainless steel and 304 stainless steel. Which one is better? 1 Different component content Austenitic stainless steel: When the steel contains about 18% Cr, 8%~25% Ni, and about 0.1% C, it has a stable austenitic structure.

304 stainless steel: The steel must contain more than 18% chromium and more than 8% nickel. 2 Different characteristics Austenitic stainless steel pipe: In addition to being resistant to corrosion by oxidizing acid media, if it contains elements such as Mo and Cu, it can also resist corrosion by sulfuric acid, phosphoric acid, formic acid, acetic acid, urea, etc.

304 stainless steel: It has corrosion resistance and formability. 3 Different uses 304 stainless steel is suitable for food processing, storage and transportation. It has good processing performance and weldability.

Austenitic stainless steel is widely used in industrial and home decoration industries and food and medical industries. Because austenitic stainless steel has comprehensive and good comprehensive properties, it has been widely used in all walks of life. 4 Different classifications There are many types of 304 stainless steel pipes. The first is seamless pipes and straight seam welded steel pipes. The second most basic classification is 304 stainless steel pipes for structures and 304 stainless steel pipes for industrial fluid transportation.

Austenitic ferritic duplex stainless steel is a stainless steel with about half austenite and half ferrite structures. In the case of low C content, the Cr content is 18%~28%, and the Ni content is 3%~10%. Some steels also contain alloying elements such as Mo, Cu, Si, Nb, Ti, and N. There are many types of austenitic stainless steel, and 304 stainless steel is just a specific type of austenitic stainless steel. Therefore, there is no good or bad.