2205/S32205 Duplex Stainless Steel
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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
-
CHEMICAL ANALYSIS (%WEIGHT)
C Cr Ni Mo N Others
< 0,030 22,5 5,5 3,3 0,18

PROPERTIES
0,2 Y.S. - Rp 0,2min ASTM / EN 0,2 Y.S. - Rp 0,2(2)typical value UTS - Rm min ASTM / EN UTS - Rm(2)typical value EI-A(1)% PREN(4) HOMOLOGATIONS
MPa Ksi MPa Ksi MPa Ksi MPa Ksi Last revised
460 67 555 80 655 95 750 109 25 36 MDS D45, WB 418


Realted Products:

Stainless steel wire rod,stainless steel pipe/tube,stainless steel flat bar,stainless steel angel bar, stainless steel sheet, stainless steel plate and so on.


Corrosion Resistance:
SS2205 has excellent general corrosion.This is better than SS316 and SS317 in most environments.

Stress Relieving:
SS2205 can be stress relieved at 525℃ to 600℃ for 60 minutes per 25mm thickness.Stress relieving SS2205 contributes significantly to improving the resistance to stress corrosion cracking by lowing the residual tensile stresses.

Machining:
The high strength that makes SS2205 useful in many applications also reduces its machinability.Cutting speeds are approximately 20% slowly than those for SS304.

Welding:
These grades can be satisfactorily welded and brazed by most conventional methods,giving a toung weld.Welding procedures should be selected with care in order to avoid hot cracking due to the fully austenitic weld microstructure obtained from using matching filler metals.
APPLICATIONS
CHEMICAL INDUSTRIES PROCESS INDUSTRIES WATER TREATMENT STORAGE & TRANSPORTATION
Nitric Acid Sulfuric Acid Polymer& otheracids Fertilisers Pulp& Paper Hydrome-tallurgy Seawater& desalination Freshwater &Tanks Waste Water Chemical Tanks Cryogenic Tanks Renewable

POWER GENERATION OIL & GAS CONSTRUCTION
Nuclear Pollution control Hydroelectric Renewable Off & Onshore & production Refining & Gas processing Petrochemical Architecture Bridges

For more technical details :
(1) Indicative typical values
(2) Indicative typical values for thickness 20 mm at RT for transverse direction
(3) Hardening 496°C (925°F), 4h, air cooling
(4) PREN = Cr + 3.3 Mo + 16N
(5) PRENW = Cr + 3.3(Mo + 0.5W) + 16N
(6) HT: mechanical properties depend on heat treatment

PDF: http://www.industeel.info/wp-content/uploads/2016/01/DS-INOX-UR2205v3-1.pdf
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