SUS 321 stainless steel: a model of high-performance materials under Japanese standards
SUS 321 is the name of a specific stainless steel grade in the Japanese Industrial Standard (JIS). It is essentially the same as 321 stainless steel. Its chemical composition contains about 17-19% chromium, 9-12% nickel, and titanium effectively inhibits the precipitation of carbides, thereby improving the overall performance of the material.
SUS 321 stainless steel has significant advantages in performance. It has excellent high-temperature oxidation resistance. In a high-temperature environment, a dense oxide film can be quickly formed on the surface to prevent further oxidation and effectively extend the service life; it has high high-temperature strength. In an environment of about 700℃, the yield strength can still be maintained at a high level, ensuring the stability of the components under high temperature and heavy load. In terms of corrosion resistance, in addition to having good resistance to atmospheric corrosion, it can also show good resistance to pitting and crevice corrosion. In terms of processing performance, whether it is cold processing such as stamping and bending, or hot processing such as hot upsetting and hot rolling, it can be carried out smoothly, and the performance of the material after processing will not be significantly affected. During welding, by reasonably controlling the welding process parameters, it can effectively avoid problems such as intergranular corrosion in the welded joints.
With these excellent properties, SUS 321 stainless steel is widely used in many industries. In the petrochemical industry, it can be used to manufacture high-temperature equipment such as cracking furnace tubes and heat exchangers, and operate stably in complex chemical production environments; in the power industry, it is often used to make high-temperature superheaters, reheaters and other components to ensure long-term safe power generation of power station boilers under high temperature and high pressure conditions; in the field of medical devices, due to its good biocompatibility and corrosion resistance, it can be used to manufacture some auxiliary devices implanted in the human body, such as connectors for orthopedic implants, etc., which remain stable in the complex physiological environment of the human body and reduce adverse effects on human tissues.
SUS 321 stainless steel has significant advantages in performance. It has excellent high-temperature oxidation resistance. In a high-temperature environment, a dense oxide film can be quickly formed on the surface to prevent further oxidation and effectively extend the service life; it has high high-temperature strength. In an environment of about 700℃, the yield strength can still be maintained at a high level, ensuring the stability of the components under high temperature and heavy load. In terms of corrosion resistance, in addition to having good resistance to atmospheric corrosion, it can also show good resistance to pitting and crevice corrosion. In terms of processing performance, whether it is cold processing such as stamping and bending, or hot processing such as hot upsetting and hot rolling, it can be carried out smoothly, and the performance of the material after processing will not be significantly affected. During welding, by reasonably controlling the welding process parameters, it can effectively avoid problems such as intergranular corrosion in the welded joints.
With these excellent properties, SUS 321 stainless steel is widely used in many industries. In the petrochemical industry, it can be used to manufacture high-temperature equipment such as cracking furnace tubes and heat exchangers, and operate stably in complex chemical production environments; in the power industry, it is often used to make high-temperature superheaters, reheaters and other components to ensure long-term safe power generation of power station boilers under high temperature and high pressure conditions; in the field of medical devices, due to its good biocompatibility and corrosion resistance, it can be used to manufacture some auxiliary devices implanted in the human body, such as connectors for orthopedic implants, etc., which remain stable in the complex physiological environment of the human body and reduce adverse effects on human tissues.