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Duplex 2205 is a two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades. It also demonstrates good fatigue strength, as well as outstanding resistance to stress corrosion cracking, crevice, pitting, erosion, and general corrosion in severe environments.
Chemical Properties:
C
Mn
Si
P
S
Cr
Mo
Ni
N
2205 (S31803)
0.03 max
2.0 max
1.0 max
0.03 max
0.02 max
min: 21.0 max: 23.0
min: 2.5 max: 3.5
min: 4.5 max: 6.5
min: 0.08 max: 0.20
2205 (S32205)
0.03 max
2.0 max
1.0 max
0.03 max
0.02 max
min: 22.0 max: 23.0
min: 3.0 max: 3.5
min: 4.5 max: 6.5
min: 0.14 max: 0.20
C
Mn
Si
P
S
Cr
Mo
Ni
N
Mechanical Properties:
Grade
Tensile Strength ksi (min)
Yield Strength 0.2% ksi (min)
Elongation %
Hardness (HB) MAX
2205
90
65
25
217
Grade
Tensile Strength ksi (min)
Yield Strength 0.2% ksi (min)
Elongation %
Hardness (HB) MAX
APPLICATIONS:
Chemical processing, transport and storage – pressure vessels, tanks, piping, and heat exchangers
Oil and gas exploration and processing equipment – piping, tubing, and heat exchangers
Marine and other high chloride environments
Effluent scrubbing systems
Pulp and paper industry – digesters, bleaching equipment, and stock-handling systems
Cargo tanks for ships and trucks
Food processing equipment
Biofuels plants
STANDARDS:
ASTM/ASME: A240 UNS S32205/S31803
EURONORM: 1.4462 X2CrNiMoN 22.5.3
AFNOR: Z3 CrNi 22.05 AZ
DIN: W.Nr 1.4462
CORROSION RESISTANCE:
Due to its high chromium, molybdenum, and nitrogen content, Duplex 2205 demonstrates superior corrosion resistant properties to 316 and 316L in most environments
Chromium, molybdenum, and nitrogen content also provide high resistance to pitting and crevice corrosion, even in oxidizing and acidic solutions
Resistant to chloride stress corrosion cracking and temperatures of up to about 302°F (150°C)
The presence of ferrite provides for good performance of Duplex 2205 in caustic environments
HEAT RESISTANCE:
Similar to other duplex stainless steels, Duplex 2205 has good oxidation resistance at high temperatures
Subject to embrittlement when exposed to temperatures above 572°F (300°C) even when exposed for short periods of time; Duplex 2205 is therefore not recommended for use above 572°F (300°C)
Jiangsu Mittel Steel Industrial Limited is located in Wuxi City, a beautiful city near Shanghai. Wuxi is close to Shanghai (BAO STEEL) ,Zhangjiagang (ZPSS),Ningbo (BAO XIN),KUN SHAN (DKSS), enjoy excellent geographic location and convenient water, land and air transporta... Jiangsu Mittel Steel Industrial Limited is located in Wuxi City, a beautiful city near Shanghai. Wuxi is close to Shanghai (BAO STEEL) ,Zhangjiagang (ZPSS),Ningbo (BAO XIN),KUN SHAN (DKSS), enjoy excellent geographic location and convenient water, land and air transporta...
