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Process flow of stainless steel seamless steel pipe production.

Manganese Mn - Pitting corrosion, low brittle manganese Mn content can improve the resistance of stainless steel to pitting corrosion while ensuring the ductility of stainless steel. The SEMI F20 standard specifies the chemical composition and metallurgical industry processing specifications for 316L stainless steel rods, forgings, extrusions, plates and pipes for semiconductor manufacturing applications to meet general, high-purity and ultra-high-purity fluid distribution system applications in the semiconductor industry. In order to achieve lower impurity content, on the basis of traditional material melting AOD (argon oxygen decarburization), vacuum melting VIM (vacuum induction melting) or even vacuum refining VAR (vacuum arc remelting) is performed to gradually remove unfavorable impurity carbon , sulfur, and manganese to improve the corrosion resistance and welding performance of stainless steel materials to meet the application requirements of ultra-high-purity fluid systems in the semiconductor industry.

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