What is the difference between 904L stainless steel and 304 stainless steel?

What is the difference between 904L stainless steel and 304 stainless steel

904L is austenitic stainless steel, which is a low-carbon, high-nickel, molybdenum austenitic stainless and acid-resistant steel. It is a proprietary material imported from French H·S Company. It has good activation-passivation transformation ability, good corrosion resistance, good corrosion resistance in non-oxidizing acids such as sulfuric acid, acetic acid, formic acid, phosphoric acid, and good corrosion resistance in neutral chloride-containing media. It has good resistance to pitting corrosion and has good resistance to crevice corrosion and stress corrosion. It is suitable for various concentrations of sulfuric acid below 70 °C, and has good corrosion resistance in acetic acid and mixed acid of formic acid and acetic acid at any concentration and temperature under normal pressure.

So what is the difference between 904l and the common 304 ratio on the market?

The difference between these two stainless steels is big. 904l is a high-chromium and high-nickel stainless steel that is resistant to high temperature and corrosion. 304 is the most common stainless steel that is corrosion-resistant and generally not resistant to high temperature. The price of the two is also very different. The price of 904l stainless steel is much higher than 304 stainless steel price. 304 is a general purpose stainless steel that is widely used to make equipment and parts that require a good combination of properties (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 18% chromium and more than 8% nickel.

Cemical Composition