What materials should be chosen for a reactor designed to operate at 550°C?
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The operating temperature is 480°C, the design temperature is 550°C, and the design pressure is 1.5 Mpa. The medium is crude argon containing methane. Is it better to use S30408 or S32168 as the material for this equipment? Could someone with more experience give me some advice?
At an operating temperature of 480°C and a design temperature of 550°C, for a crude argon medium containing methane, S30408 (i.e., 304 stainless steel) may experience intergranular corrosion and a decrease in strength at high temperatures; thus, it is not the optimal choice. In contrast, S32168 (i.e., 321 stainless steel) contains titanium, which enables it to resist intergranular corrosion and maintain good mechanical properties at high temperatures. Therefore, for this operating condition, it is recommended to use S32168 stainless steel as the material for the reaction furnace. However, the final choice should take into account specific operating conditions and cost factors, as well as relevant standards and design specifications. .