1. Standard Designations

• UNS: S31603

• ASTM: A312/A312M (Seamless & Welded)

• ASTM: A358/A358M (EFW)

• ASTM: A269/A269M (General Service)

• EN: 1.4404

• JIS: SUS 316L

2. Chemical Composition (% by weight)

3. Mechanical Properties

4. Corrosion Resistance

• Chloride Resistance: Excellent resistance to pitting and crevice corrosion

• General Corrosion: Good resistance to a wide range of chemicals and acids

• Intergranular Corrosion: Excellent resistance in as-welded condition

• PREN Value: 24-26

5. Physical Properties

6. Product Range & Specifications

7. Manufacturing Processes

• Seamless Pipe: Hot extruded, Cold drawn

• Welded Pipe: ERW, EFW, TIG Welded

8. Surface Finishes

• Annealed & Pickled: Standard mill finish

• Mechanically Polished: 180G-600G

• Electropolished: High purity applications

• Bead Blasted: Uniform matte finish

9. Typical Applications

• Chemical and petrochemical processing

• Pharmaceutical and biotech industries

• Marine and coastal applications

• Food processing equipment

• Heat exchangers and condenser tubes

• Medical equipment and devices

• Desalination plants

Quality Assurance:

• Hydrostatic testing per ASTM standards

• Nondestructive testing (UT, ET, RT)

• PMI (Positive Material Identification)

• Intergranular corrosion testing

• Full material traceability

Technical Notes:

• Superior corrosion resistance to 304/L in chloride environments

• Excellent welding characteristics without post-weld annealing

• Suitable for temperatures up to 450°C

• Good formability and ductility

• Cost-effective solution for corrosive service applications

All pipes are supplied with complete test certificates and meet relevant international standards for quality and performance.