2205 Same grade from different standard
S31803 S32205 S22053 022Cr23Ni5Mo3N 022Cr22Ni5Mo3N 1.4462 SUS329j3L S22253 duplex stainless steel
S31803Chemical component ASTM A240:
C: ≤ 0.03, Si: ≤1.0, Mn: ≤ 2.0, Cr: 21.00～23.00, Ni: 4.5～6.5, S: ≤0.02, P: ≤0.03, Mo: 2.5-3.5, N: 0.08-0.2
S31803 mechanical property ASTM A240:
Tensile strength: > 620 Mpa
Yield Strength: >450 Mpa
Elongation (%): > 25%
Hardness: < HBS 293
Description of 2205 stainless steel plate
205 Duplex Stainless Steel or 2205 alloy is a duplex stainless steel made of 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy and others. It has high strength, good impact toughness and good overall and local resistance to stress corrosion.
Features about 2205 stainless steel plate
Duplex Stainless Steel 2205 Compared with 316L and 317L austenitic stainless steels, 2205 is superior in anti-pitting and crevice corrosion resistance. It has high corrosion resistance. Compared with austenite, its thermal expansion Coefficient lower, thermal conductivity higher.
Duplex Stainless Steel 2205 has twice the compressive strength of austenitic stainless steel, allowing designers to reduce their weight compared to 316L and 317L. The 2205 alloy is especially suitable for use in the -50 ° F / + 600 ° F temperature range and can be used for lower temperatures under severe restrictions (especially for welded construction).
Corrosion resistance of 2205 stainless steel plate
Uniform corrosion, The corrosion resistance of 2205 is superior to 316L and 317L in most environments due to chromium content (22%), molybdenum (3%) and nitrogen content (0.18%).
Local anti-corrosion, The content of chromium, molybdenum, and nitrogen in duplex steel 2205 makes it highly resistant to pitting and crevice corrosion in oxidizing and acidic solutions.
Anti-stress corrosion, The 2205 duplex structure of stainless steel helps to improve the resistance to stress corrosion cracking of stainless steel. In a certain temperature, under the conditions of tension, oxygen, and chloride, chloride stress corrosion occurs in austenitic stainless steel. As these conditions are not easily controlled, the use of 304L, 316L, and 317L is limited in this regard.
Anti-corrosion fatigue, Dual-phase steel 2205 high strength and corrosion resistance to high corrosion resistance fatigue strength. The processing equipment is susceptible to corrosive environments and loading cycles, and the 2205 features are well suited for such applications.
Metallography about 2205/S31803 plate
The chemical composition of the 2205 duplex steel gives the desired microstructure of 50 α / 50 γ after 1900 ° / 1922 ° F (1040 ° / 1080 ° C) solid solution annealing. If the heat treatment temperature is higher than 2000 ° F, may lead to an increase in ferrite composition. Like other duplex stainless steels, 2205 alloys are susceptible to intermetallic phase precipitation.
The intermetallic phase precipitates between 1300 ° F and 1800 ° F and precipitates fastest at 1600 ° F. Therefore, we need to test 2205, to ensure that no intermetallic phase, the test reference ASTM A 923.