304L stainless steel tube--S30403 (American AISI, ASTM) 304L stainless steel tube belongs to the international stainless steel marking method. 304L stainless steel pipe - S30403 (United States AISI, ASTM) 304L corresponding to the Chinese brand is 00Cr19Ni10, characteristics and uses: 0Cr19Ni9 lower carbon content of the steel, superior resistance to intergranular corrosion, not for heat treatment after welding components. The elemental content of the 304L stainless steel tube is C≤0.03 Ni8.00 to 12.00 Cr18.00 to 20.00, and Mn<=2.0 Si<=1.0 S<=0.030 P<=0.035. 304L stainless steel pipe 18Cr-8Ni - low carbon as low C 304 steel, in general, its corrosion resistance is similar to 304 steel, but its resistance to grain boundary corrosion is excellent after welding or after eliminating stress; In the case of heat treatment, good corrosion resistance can also be maintained, and the use temperature is -196°C~800°C. It is used in open field machines in the chemical, coal, and petroleum industries where grain boundary corrosion resistance is high, heat-resistant parts of building materials, and parts that are difficult to heat treat.