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S30408 and S30403 stainless steel characteristics difference and use introduction

S30408 and S30403 stainless steel characteristics difference and use introduction

Time:2022-03-18 Source:China Wuxi JiaNuo Special Steel Co.

12Cr18Ni9 (S30210) is the oldest austenitic stainless steel, with good plasticity, toughness and cold workability in the solid state, and good corrosion resistance in oxidizing acids and atmospheric, water, steam and other media. Cold working has high strength, but elongation is slightly worse than 12Cr17Ni7. It is mainly used for structural parts and welded parts which do not require high corrosion resistance and strength, such as building exterior decoration materials; it can also be used for non-magnetic parts and parts of low-temperature devices. However, in the sensitized state or after welding, it has the tendency of intergranular corrosion and should not be used as welding structural material.


06Cr19Ni10 (S30408) In 12Cr18Ni9 steel based on the development of the evolution of steel, similar to 12Cr18Ni9 steel, but better corrosion resistance than 12Cr18Ni9, can be used as a thin cross-sectional size of the welded parts, is the largest amount of application, the use of the widest range of stainless steel. Suitable for the manufacture of deep-drawn forming parts and acid pipeline, container structural parts, etc., can also be manufactured non-magnetic, low-temperature equipment and components.


To solve the Cr23C6 precipitation caused by 06Cr19Ni10 (0Cr18Ni9) steel in some conditions there is a serious tendency of intergranular corrosion and the development of ultra-low carbon austenitic stainless steel, its sensitization state intergranular corrosion resistance is significantly better than 06Cr18Ni9 steel. In addition to slightly lower strength, other properties with 06Cr18Ni9T steel, mainly used for welding and welding and can not be solid solution treatment of corrosion-resistant equipment and components.