1. Standard Designations

• UNS: S32205/S31803

• ASTM: A790/A790M

• ASTM: A928/A928M

• EN: 1.4462

• JIS: SUS 329J3L

• GB/T: 022Cr22Ni5Mo3N

2. Chemical Composition (% by weight)

3. Mechanical Properties

4. Corrosion Resistance

• PREN Value: 34-36

• Stress Corrosion Cracking: Excellent resistance in chloride environments

• Pitting & Crevice Corrosion: Outstanding performance

• General Corrosion: Good resistance to a wide range of corrosive media

• Erosion Corrosion: Good resistance due to high strength

5. Physical Properties

6. Product Range & Specifications

7. Manufacturing Processes

• Seamless Pipe: Hot extruded, cold drawn

• Welded Pipe: EFW, TIG Welded

8. Surface Finishes

• Annealed & Pickled: Standard solution annealed finish

• Mechanically Polished: 180G-400G

• Bead Blasted: Uniform matte surface

9. Typical Applications

• Oil and gas industry piping systems

• Chemical process industry

• Pulp and paper manufacturing

• Marine and offshore applications

• Pollution control equipment

• Heat exchangers and condensers

Quality Assurance:

• Hydrostatic testing per ASTM A790

• Nondestructive testing (UT, RT, ET)

• PMI verification

• Ferrite content testing (40-60%)

• Intergranular corrosion testing

• Full traceability with material certificates

Technical Notes:

• Offers about twice the yield strength of conventional austenitic stainless steels

• Requires controlled welding procedures to maintain corrosion resistance

• Suitable for temperatures between -50°C to 300°C

• Optimal performance in chloride-containing environments

• Cost-effective alternative to high-nickel alloys

All pipes comply with international standards and are supplied with complete certification packages for critical service applications.