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2205 duplex stainless steel is a 22% Chromium, 3% Molybdenum, 5-6% Nickel nitrogen alloyed duplex stainless steel with high general, localized and stress corrosion resistance properties in addition to high strength and excellent impact toughness. 2205 duplex stainless steel provides pitting and crevice corrosion resistance superior to 316L or 317L austenitic stainless steels in almost all corrosive media. It also has high corrosion and erosion fatigue properties as well as lower thermal expansion and higher thermal conductivity than austenitic. The yield strength is about twice that of austenitic stainless steels. This allows a designer to save weight and makes the alloy more cost competitive when compared to 316L or 317L. 2205 duplex stainless steel is particularly suitable for applications covering the -50°F/+600°F temperature range. Temperatures outside this range may be considered but need some restrictions, particularly for welded structures.
1.Chemical processing, transport and storage – pressure vessels, tanks, piping, and heat exchangers
2.Oil and gas exploration and processing equipment – piping, tubing, and heat exchangers
3.Marine and other high chloride environments
4.Effluent scrubbing systems
5.Pulp and paper industry – digesters, bleaching equipment, and stock-handling systems
6.Cargo tanks for ships and trucks
7.Food processing equipment
8.Biofuels plants
stainless steel composition content | |||||||||
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
304 | ≤0.08 | ≤2 | ≤0.75 | ≤0.045 | ≤0.03 | 18-20 | 8-10.5 | ≤0.1 | |
304L | ≤0.03 | ≤2 | ≤1 | ≤0.045 | ≤0.03 | 18-20 | 9-11 | ||
304H | 0.04-0.1 | ≤2 | ≤0.75 | ≤0.045 | ≤0.03 | 18-20 | 8-10.5 | ||
316 | ≤0.08 | ≤2.00 | ≤1.00 | ≤0.035 | ≤0.03 | 16.0-18.5 | 2.0-3.0 | 10.0-14.0 | |
321 | ≤0.08 | ≤2.00 | ≤0.75 | ≤0.75 | ≤0.03 | 7.00-19.0 | 9.00-12.00 | ||
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Liaocheng Economic and Technological Development Zone, Shandong Province, China
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