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Duplex stainless steel welded pipe 2205 alloy is a composite 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.
Compared with 316L and 317L austenitic stainless steel, 2205 alloy is superior in pitting corrosion and crevice corrosion resistance. It has high corrosion resistance. Compared with austenite, it has a lower thermal expansion coefficient and better thermal conductivity. Sex is higher. the
· Pressure vessels, high-pressure storage tanks, high-pressure pipelines, and heat exchangers (chemical processing industry). the
· Oil and gas pipelines, heat exchanger fittings. the
· Sewage treatment system. the
· Pulp and paper industry classifiers, bleaching plants, storage, and handling systems. the
· Rotary shafts, press rolls, blades, impellers, etc. in high-strength and corrosion-resistant environments. the
· Cargo boxes for ships or trucks
· Food processing equipment
Uniform corrosion Due to the chromium content (22%), molybdenum (3%), and nitrogen content (0.18%), the corrosion resistance of 2205 is better than 316L and 317L in most environments.
Local corrosion resistance
The content of chromium, molybdenum, and nitrogen in the produced 2205 duplex stainless steel makes it have strong resistance to pitting corrosion and crevice corrosion in oxidizing and acidic solutions.
Stress corrosion resistance
The duplex microstructure of stainless steel helps to improve the resistance of stainless steel to stress corrosion cracking. Under the conditions of certain temperatures, stress tension, oxygen, and chloride, austenitic stainless steel will undergo chloride stress corrosion. Because these conditions are not easy to control, the use of 304L, 316L, and 317L is limited in this regard.
The high strength and corrosion resistance of 2205 dual-phase steel make it have high corrosion fatigue resistance. Processing equipment is susceptible to corrosive environments and loading cycles, and the properties of 2205 are well-suited for such applications.
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