2205/S32205 Duplex Stainless Steel
SS2205 is a duplex steel with a microstructure,when heat treated properly,od nearly equare proportions of austenite and ferrite.This microsturcture ensures that SS2205 is much more resistant to stress corrosion cracking than SS304 and SS316L.The higher chromium,molybdenum and nitrogen contens give SS2205 significantly improved pitting and crevice-corrosion resistance in the presence of chlorides.SS2205 also has better general corrosion resistance than SS316L in most environment.In addition,SS2205 has a 0.2% Proof Stress of about double that of conventional austenitic stainless steels.
SS2205 has a ductile-to-brittle transition temperature of about -50℃.The stainless steel grade can also become embrittled when exposed to temperature between 300℃ and 550℃,550℃ to 1000℃ and chi phase formation.So application temperatures are generally limited from -50℃ to 300℃.
STANDARDS
INDUSTEEL TRADEMARKS
UNS
ASTM
EURONORMS EN
SUS
S31803/S32205
2205
1.4462
X2CrNiMoN22-5-3