Properties and applications of stainless steel materials

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Steel Type, Properties, Characteristics, and Applications:
304 – Low-carbon austenitic stainless acid-resistant steel. It possesses moderate resistance to intergranular corrosion along with excellent corrosion resistance; it also has some resistance to alkaline solutions as well as most organic and inorganic acids. It is widely used in acid transport pipelines and chemical processing equipment.
304H – Austenitic stainless heat-resistant steel. It features good corrosion resistance and weldability, as well as decent high-temperature strength. It is mainly used in large boilers’ superheaters, reheaters, steam pipes, and heat exchangers in the petrochemical industry.
304L – Ultra-low-carbon austenitic stainless acid-resistant steel. It has good resistance to intergranular corrosion and performs well in various highly corrosive environments. It is suitable for use in corrosion-resistant components in the petrochemical industry, especially for welded fittings that cannot be heat-treated after welding.
316 – Austenitic stainless heat-resistant steel. It offers excellent resistance to various inorganic acids, organic acids, alkalis, and salts, as well as resistance to pitting corrosion. It also maintains good creep strength at high temperatures. It is suitable for use in large boilers’ superheaters, reheaters, steam pipes, and heat exchanger components in the petrochemical industry; it can also be used as a material resistant to pitting corrosion.
316L – Ultra-low-carbon austenitic stainless acid-resistant steel. It has good resistance to intergranular corrosion and performs well in the presence of organic acids, alkalis, and salts. It is suitable for manufacturing important corrosion-resistant fittings for industrial equipment used in the synthesis of fibers, the petrochemical industry, textiles, fertilizer production, printing and dyeing, and nuclear waste treatment.
321 – Austenitic stainless acid-resistant steel. It has high resistance to intergranular corrosion and good resistance to certain organic and inorganic acids, especially in oxidative environments. It is used in the manufacture of acid-resistant transport pipelines, large boilers’ superheaters, reheaters, steam pipes, and heat exchangers in the petrochemical industry.
347H – Austenitic stainless heat-resistant steel. It possesses good corrosion resistance, weldability, and high-temperature strength. It is used in large boilers’ superheaters, reheaters, steam pipes, and heat exchanger components in the petrochemical industry.
2205 – Ultra-low-carbon duplex stainless acid-resistant steel. It has high resistance to pitting corrosion, crevice corrosion, stress corrosion, and uniform corrosion. It also boasts high strength and good toughness. It is used in the manufacture of various industrial heat exchangers and pipes, especially in environments containing chlorides and H2S, as well as in solutions of organic acids like acetic acid.
904L – High-nickel-molybdenum austenitic stainless acid-resistant steel. It has excellent corrosion resistance, good resistance to pitting and crevice corrosion, and decent resistance to stress corrosion. It is suitable for use in environments with organic acids in the petrochemical industry, as well as in media such as sulfuric acid and phosphoric acid in the inorganic chemical industry.
310S – Austenitic heat-resistant stainless steel. It has good resistance to intergranular corrosion, excellent resistance to chloride-induced stress corrosion, and good resistance to high-temperature oxidation. It is used in the manufacture of furnace tubes, boiler superheaters, and heat exchanger components.
314 – Austenitic heat-resistant stainless steel. It has good resistance to high-temperature oxidation and creep. It is used in furnace tubes.
317L – Austenitic stainless acid-resistant steel. It offers excellent corrosion resistance, with particularly good resistance to pitting corrosion in solutions containing chlorides. It is used in the manufacture of important pipes for industrial equipment in the synthesis of fibers, the petrochemical industry, textiles, paper production, and nuclear waste treatment