S31803 duplex stainless steel is a kind of steel with good corrosion resistance and high strength (yield strength is 2-3 times that of other austenitic steels). The steel contains high chromium and molybdenum, so it has excellent The ability to resist pitting and uniform corrosion. The dual-phase microstructure ensures that the steel has a high resistance to stress corrosion cracking, and the mechanical strength is also high. S31803 duplex stainless steel pipe is a medium-alloy duplex stainless steel with good chloride stress resistance. Medium alloy type-representative grade is UNS S31803 (22Cr-5Ni-3Mo-0.15N); S31803 duplex steel pipe is used in three types of duplex steel (2205 duplex stainless steel pipe, 2507 duplex stainless steel pipe, S31803 duplex stainless steel pipe, and S31803 duplex stainless steel pipe. Seam tube).

S32205 is derived from 022Cr22Ni5Mo3N and has a narrower range. Ordinary steel grades are used in bidirectional steels, which are resistant to curing hydrogen, carbon dioxide, and chloride environments. They can be formed by hot and cold processing and have good welding performance. They are suitable for use as structural materials instead of 304 and 316. S32205 is a duplex stainless steel composed of 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. It has high strength, good impact toughness and good overall and local stress corrosion resistance.

2507 (UNS S32750) duplex stainless steel has strong strength and corrosion resistance, and is mainly used for chemical processing, petrochemical and subsea equipment.

The yield strength of 2205 duplex stainless steel is more than twice that of ordinary austenitic stainless steel. This feature enables designers to reduce weight when designing products, making this alloy more cost-effective than 316 and 317L. This alloy is particularly suitable for the temperature range of -50°F/+600°F. For applications beyond this temperature range, this alloy can also be considered, but there are some limitations, especially when applied to welded structures.

S32750 stainless steel is a high-alloy super duplex stainless steel with strong steel strength and corrosion resistance, and excellent overall performance.

S31803 duplex stainless steel pipe is a stainless steel pipe with good resistance to chloride stress.

254SMO is an austenitic stainless steel. Due to its high molybdenum content, it has extremely high resistance to pitting corrosion and crevice corrosion. This grade of stainless steel was developed and developed for use in environments containing halide such as seawater. 254SMO also has good uniform corrosion resistance. Especially in acids containing halide, the steel is superior to ordinary stainless steel.

253MA is a nickel-saving heat-resistant austenitic stainless steel designed for applications that require high creep strength and good corrosion resistance. Its operating temperature range is 850~1100 ℃.

S32760 (F55, 1.4501) is a high-alloy super duplex stainless steel, mainly used in various strong corrosive environments. S32760 dual-phase steel has strong strength and corrosion resistance, and is mainly used in chemical processing, petrochemical and subsea equipment. It has strong resistance to chloride corrosion, high thermal conductivity and low thermal expansion coefficient. The high content of chromium, molybdenum and nitrogen makes it highly resistant to pitting corrosion, crevice corrosion and other corrosion. The excellent comprehensive properties of S32760 dual-phase steel are better than ordinary dual-phase steel.

2507 is a ferritic-austenitic (duplex) stainless steel with excellent resistance to pitting corrosion, crevice corrosion and uniform corrosion.

Duplex stainless steel 2205 standard number: ASTM A240/A240M--01 duplex stainless steel 2205 alloy is a duplex stainless steel composed of 22% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. It has high strength, good impact toughness and good overall and local stress corrosion resistance.

904L super austenitic stainless steel is a low-carbon, high-nickel, molybdenum austenitic stainless and acid-resistant steel, which is a proprietary material imported from France H·S. It has good activation-passivation transformation ability, excellent corrosion resistance, good corrosion resistance in non-oxidizing acids such as sulfuric acid, acetic acid, formic acid, and phosphoric acid, and good corrosion resistance in neutral chloride-containing media It has good pitting corrosion resistance and good resistance to crevice corrosion and stress corrosion. It is suitable for sulfuric acid of various concentrations below 70°C, and has good corrosion resistance in acetic acid at any concentration and at any temperature and mixed acid of formic acid and acetic acid under normal pressure.