Duplex S32205 Characteristics
UNS S32205(1.4462, ASTM A182 F60) is a duplex grade with a ferritic-austenitic microstructure. The alloy consists of around 40-50% ferrite in the annealed condition. The duplex S32205 has the high strength of the ferritic grades whilst retaining the corrosion resistance of the austenitic grades.
UNS S32205 has superior resistance to chloride pitting and crevice corrosion as compared to 317L stainless steel. The alloy has outstanding corrosion resistance to seawater and most concentrations of sulphuric acid. In addition, UNS S32205 duplex stainless is also resistant to sulphide stress corrosion cracking (sour-gas environments).
The high quality and therefore performance of Duplex UNS S32205 is widely attributed to the high levels of chromium present as well as nitrogen and molybdenum.
Duplex stainless steel S32205 Chemical Composition, %
|
Grade |
C≤ |
Mn≤ |
P≤ |
S≤ |
Si≤ |
Ni |
Cr |
Mo |
N |
|
S32205 |
0.04 |
2 |
0.03 |
0.02 |
1.00 |
4.5–6.5 |
22.0–23.0 |
3.0–3.5 |
0.14–0.20 |
Duplex stainless steel S32205 Mechanical Properties
|
Grade |
Tensile, min, ksi[MPa] |
Yield, min, ksi[MPa] |
Elongation, %(min) |
Hardness, HB(max) |
|
S32205 |
95 [655] |
65 [450] |
25 |
293 |
Physical properties
Density: 7.8 g/cm3
Duplex stainless steel S32205 Equivalent Grades
|
STANDARD |
WERKSTOFF NR. |
UNS |
EN |
|
Duplex S32205 |
1.4462 |
S32205 |
X2CrNiMoN22-5-3 |
ASTM Specifications
|
Pipe |
Tube |
Sheet/Plate |
Bar /Rod |
Forging /Flange |
BW Fittings |
|
ASTM A790 |
ASTM A789 |
ASTM A240 |
ASTM A276/A479 |
ASTM A182 F60 |
ASTM A815 |
Duplex stainless steel S32205 Application
1.Seawater systems
2.Oil field piping
3.Chemical process vessels, piping, and heat exchangers
4.FGD scrubber systems
5.Pulp mill digesters, bleach washers
6.Food process equipment
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