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The implementation standard of S30403 stainless steel is GB/T 24511-2017 “Stainless steel and heat-resistant steel plates and steel belts for pressure equipment”, which is mainly used for pressure equipment such as pressure vessels. The use of 304L stainless steel is different from S30403 stainless steel, mainly used in automotive parts, hardware tools, petrochemical, food industry, construction engineering, Marine industry, nuclear power, aerospace, machinery manufacturing, container manufacturing, ships and Bridges and other fields. The phosphorus content of S30403 stainless steel is less than 0.035, and the sulfur content is less than 0.015. Regardless of the implementation of JIS, ASTM, or the national standard GB/T 20878-2007 of 304L stainless steel, its phosphorus content is less than 0.045, sulfur content is less than 0.030. From the chemical composition, it can be seen that S30403 stainless steel has higher requirements for phosphorus and sulfur content than 304L stainless steel. Similarly, the extended strength of S30403 stainless steel is not less than 210, 230; The tensile strength is not less than 490. The extended strength of 304L stainless steel is not less than 180; The tensile strength is not less than 485. S30403 stainless steel is stronger than 304L stainless steel in terms of mechanical properties. At present, there are only a few domestic steel mills that have obtained GB/24511-2017 production standards, and the corresponding warranty documents of the stainless steel coils produced will be reflected, and the S30403 stainless steel requires that the plate thickness tolerance must be above 0.75mm. In short, under the premise of not strictly discriminating standards, the difference between 304L stainless steel and S30403 stainless steel is small, the characteristics are similar, and the digital code of both is S30403. If you want to get the correct 304L material that meets your requirements, please contact Zyta in time, she will use her professional knowledge to provide you with professional services. With professional service, recently Hua steel Company reived and quickly shipment about 700 tons to Vietnam for over 10mm thickness stainless steel plates S30403. If you have any inquiry for stainless steel sheets or plates, no matter anything material grades, we will supply you well.