2205 / s31803 / s32205 / 1.4462


2205 is a duplex (austenitic-ferritic) stainless steel containing about 40 – 50% ferrite in the annealed condition. 2205 has been a practical solution to chloride stress corrosion cracking problems experienced with 304/304L or 316/316L stainless. The high chromium, molybdenum and nitrogen contents provide corrosion resistance superior to 316/316L and 317L stainless in most environments. 2205 is not suggested for operating temperatures above 600°F.

The design strength of 2205 is significantly higher than 316/316L, often permitting lighter wall construction. 2205 has good notch impact toughness down to temperatures below – 40°F. 2205 is welded with E2209 or ER2209 fillers.

 

UNS AISI/ASTM DIN/EN 
S31803/S32205 2205 1.4462
Chemical Composition:
% C Mn P S Si
Min
Max 0.03 2 0.03 0.02 1
Ni Cr Mo N
Min 4.5 21 2.5 0.08
Max 6.5 23 3.5 0.2
Physical Performance:
Heat Treatment T*S Y*S El Hardness
MPA MPA % HB
1020-1100 620 450 25 ≤290

 

Form ASTM
Rod, bar and shape A 276, A 484
Plate, sheet and strip A 240, A 480
Seamless and welded pipe A 790, A 999
Seamless and welded tubing A 789, A 1016
Fitting A 815, A 960
Forged or rolled pipe flange and forged fitting A 182, A 961
Billet and bar for forging A 314, A 484

 

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