SAF® 2205
UNS S31803/S32205 | EN 1.4462 | Duplex
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About
SAF® 2205 is a duplex (austenitic-ferritic) stainless steel characterized by:
- High resistance to stress corrosion cracking (SCC) in chloride-bearing environments
- High resistance to stress corrosion cracking (SCC) in environments containing hydrogen sulfide
- High resistance to general corrosion, pitting, and crevice corrosion
- High resistance to erosion corrosion and corrosion fatigue
- High mechanical strength - roughly twice the proof strength of austenitic stainless steel
- Physical properties that offer design advantages
- Good weldability
Standards
- UNS: S31803, S32205
- EN Number: 1.4462
- EN Name: X2CrNiMoN 22-5-3
- W.Nr.: 1.4462
- DIN: X2CrNiMoN 22 5 3
- SS: 2377
- AFNOR: Z2.CND22.05.03
Product standards
| Seamless tube: | EN 10216-5, NFA 49-217 |
| Seamless and welded tube: | ASTM A789 |
| Seamless and welded pipe: | ASTM A790 |
| Flanges and valves: | ASTM A182 |
| Fittings: | ASTM A182; A815 |
| Plate, sheet and strip: | ASTM A240, EN 10088-2 |
| Bar and shapes: | ASTM A276, A479, EN 10088-3 |
| Forged billets | EN 10088-3 |
Approvals
- ASME Boiler and Pressure Vessel Code, Section VIII, Div. 1 and Div. 2
- VdTÜV-Werkstoffblatt 418 (Ferritisch-austenitischer Walz- und Schmiedestahl)
- NACE MR0175/ISO 15156 (Petroleum and natural gas industries - Materials for use in H2S-containing Environments in oil and gas production - Part 3: Cracking-resistant CRAs (corrosion resistant alloys and other alloys) (Published:2015)
- NACE MR0103-2012, Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments
- DNV (Approval of Seamless Ferritic/Austenitic Stainless Steel Tubes and Pipes in Quality SAF 2205)
- ASME B31.3 Process Piping