In fact, the content of chromium nickel is 304 stainless steel. The ingredients are 18%chromium (CR) and 8%nickel (Ni), but the main difference is that the carbon content is different.

304L is ultra -low -carbon stainless steel. The carbon content is reduced to less than 0.03%. It can avoid corrosion of the crystal, and theoretically the effect of anti -stress corrosion is stronger than 304, but the effect in practical applications is not obvious. The purpose of reducing carbon and adding titanium is the same, but the titanium 321 smelting cost is high, the steel is thick, and the price is more expensive.

H in 304h refers to high temperature, and high carbon content is the guarantee of high temperature intensity. When GB150 requires Octoba steel to be used above 525 degrees, the carbon content is not less than 0.04%. Carbides are enhanced phases, especially high temperature strength strength Occasionally better than pure October.

Among the three, the highest carbon content is 304h, the lowest carbon content is 304L, while the carbon content of 304 stainless steel is between the two. The higher the carbon content, the worse the corrosion resistance of the stainless steel and rust. The difference in carbon content also leads to different prices, and the different requirements of that sentence are different.