304L stainless steel, also known as ultra-low carbon stainless steel, is a kind of universal stainless steel material, widely used in the production of good comprehensive performance (corrosion resistance and formability) of equipment and parts. 304L Stainless Steel Brand: The old standard JB/T 4237-1992 corresponds to 00Cr19Ni10 New standard GB/T 20878-2007 stainless steel and heat-resistant steel grade and chemical composition And GB 24511 2009 stainless steel plates and strips for pressure equipment The above corresponds to 022Cr19Ni10, and its carbon content is about 0.03% The unified digital code S30403 is different from the S30408 of 304