309S corresponding Chinese brands are 0Cr23Ni13, American Standard S30908 (US AISI, ASTM) characteristics and uses: corrosion resistance, heat resistance than 0Cr19Ni9 good. 309S is cutting stainless steel containing sulfur, the main requirements for cutting and surface finish high occasions. 309s is a low-carbon 309 stainless steel variant, for the need for welding applications. Lower carbon content makes it close to the weld heat affected zone to minimize carbide precipitation, and carbide precipitation may lead to intergranular corrosion of stainless steel in some environments (welding erosion). [1] feature can withstand repeated heating below 980 ℃, with a high temperature strength and oxidation resistance, anti-carburizing performance. Purpose: furnace materials. Widely used in important areas of the boiler, energy (nuclear power, thermal power, fuel cells), industrial furnaces, incinerators, furnaces, chemical, petrochemical, and other. Two chemical ingredients 309S stainless steel GB / T1220-1992 C≤0.08 Mn≤2.00 Si≤1.00 P≤0.045 S≤0.030 Ni≤12.0-15.0 Cr≤22.0-24.0 3 mechanical properties of yield strength / MPa: ≥ 205 Tensile strength / MPa : ≥515 Elongation /%: ≥ 40 section shrinkage /%: ≥50