The difference between 304L stainless steel pipe and 304 stainless steel pipe is actually the difference between 304L and 304 stainless steel materials.

In fact, they are distinguished by the content of chromium and nickel. They are all 304 stainless steels. The composition contains 18% chromium (Cr) and 8% nickel (Ni), but the main difference lies in the carbon content.

Compared with 304 stainless steel, 304L is an ultra-low carbon stainless steel. The carbon content is reduced to less than 0.03%, which can avoid intergranular corrosion. In theory, the effect of stress corrosion resistance is stronger than that of 304, but the effect is not obvious in practical applications. .

304L stainless steel has the same purpose of reducing carbon and adding titanium, but the smelting cost of 321 with titanium is higher, the molten steel is thick, and the price is more expensive.