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.
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.
· Pressure vessels, high-pressure storage tanks, high-pressure pipes, heat exchangers (chemical processing industry).
· Oil and gas pipelines, heat exchanger fittings.
· Sewage treatment system.
· Pulp and paper industry classifiers, bleaching equipment, storage and processing systems.
· Rotary shafts, press rolls, blades, impellers, etc. under high-strength and corrosion-resistant environments.
· Cargo boxes of ships or trucks
1.Compared with 316L and 317L austenitic stainless steel, duplex stainless steel 2205 alloy has superior performance in resistance to pitting corrosion and crevice corrosion. It has high corrosion resistance. Compared with austenite, it The coefficient of thermal expansion is lower and the thermal conductivity is higher.
2. Compared with austenitic stainless steel, duplex stainless steel 2205 alloy has twice its compressive strength. Compared with 316L and 317L, the designer can reduce its weight. Alloy 2205 is especially suitable for the temperature range of -50°F/+600°F. Under strict restrictions (especially for welded structures), it can also be used at lower temperatures.