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UNS S32205(1.4462, ASTM A182 F60) is a duplex grade with a ferritic-austenitic microstructure consists of around 40-50% ferrite in the annealed condition. 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, Alloy 2205(UNS S32205) has outstanding corrosion resistance to seawater and most concentrations of sulphuric acid. In addition, 2205 duplex stainless is also resistant to sulphide stress corrosion cracking (sour-gas environments). These high quality corrosion resistance, resistance to stress corrosion cracking and therefore performance are widely attributed to its high levels of chromium present as well as nitrogen and molybdenum.
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 |
Grade | Tensile, min, ksi[MPa] | Yield, min, ksi[MPa] | Elongation, %(min) | Hardness, HB(max) |
S32205 | 95 [655] | 65 [450] | 25 | 293 |
Density: 7.8 g/cm3
Duplex stainless steel S32205 Equivalent Grades
STANDARD | WERKSTOFF NR. | UNS | EN |
Duplex S32205 | 1.4462 | S32205 | X2CrNiMoN22-5-3 |
Duplex stainless steel S32205 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:
Seawater systems
Oil field piping
Chemical process vessels, piping, and heat exchangers
FGD scrubber systems
Pulp mill digesters, bleach washers
Food process equipment