1, the composition is different. 308 stainless steel is composed of 20 percent of chromium and 10 percent of nickel. 304 stainless steel is composed of 18 percent of chromium and 8 percent of nickel.
2, different properties. 308 stainless steel has corrosion resistance and heat resistance, used in the manufacture of kitchen utensils, cutlery and medical equipment. 304 stainless steel corrosion resistance is weaker than 308 stainless steel. Therefore, 308 stainless steel and 304 have differences in composition and properties.