Alloy 2205 Stainless Steel

WLD Steel is a leading manufacturer, supplier and exporter of the duplex stainless steel 2205 available in a number of different sizes and forms including pipe, tube, sheet, plate, bar, rod and other shapes like angle, channel, beam, circle and so on.

By containing 22% chromium and 5% nickel, UNS S31803 and UNS S32205 are often referred to as Alloy 2205. S31803 is a type of low alloy duplex stainless steel and S32205 is the upgraded version of S31803 by the addition of the lower limit content of Cr, Mo and N elements, which makes the little difference in mechanical properties. The grade 2205 offers excellent resistance to intergranular corrosion, pitting and crevice corrosion combined with its resistance to chloride stress corrosion cracking at temperatures 50 – 300ºC, is widely used in the chemical industry, paper manufacturing, desalination equipment, firewalls, pressure vessels, heat exchangers, turbine blades and transmission shafts of offshore fields.

What’s the 2205 steel available forms and specifications at WLD Steel?

Sheet/plate/coil Seamless pipe/tube Welded pipe/tube Round bar Formed steel(Shaped)
JIS G4304 / 4305, ASTM A240 ASTMA789,


ASTM A928 ASTM A479, ASTM A276 ASTM A276

2205 Steel Equivalent Materials

S31803 SS2377(


329J2L 1.4462


318S13 UR45N 00Cr22Ni5Mo3N

2205 Chemical Composition

Grades C, max P S Si, max Mn, max N Mo Ni Cr
S31803 0.03 0.03 0.02 1.00 2.00 0.08-0.2 2.5-3.5 4.5-6.5 21.0-23.0
S32205 0.03


0.03 0.02 1.00


2.00 max 0.14-0.2 3.0-3.5 4.5-6.5 22.0-23.0

2205 Mechanical Properties

Grades Tensile strength

min, Mpa

Yield strength

0.2% offset, min, Mpa

Elongation, A5%
S31803 620 450 25
S32205 655 450 25