1. Standard Designations

• UNS: S31603

• ASTM: A240/A240M

• EURONORM: 1.4404

• JIS: SUS 316L

• GB/T: 022Cr17Ni12Mo2

2. Chemical Composition (% by weight)

3. Mechanical Properties (at Room Temperature, for Annealed Condition)

(Note: The reduced carbon content results in slightly lower yield and tensile strength compared to standard 316, but greatly enhanced weldability.)

4. Physical Properties (Typical)

Identical to 316.

5. Corrosion Resistance

• Chloride Resistance: Excellent. The molybdenum content provides superior resistance to pitting and crevice corrosion in chloride environments, such as seawater and process chemicals.

• Intergranular Corrosion: Significantly superior to standard 316 in welded applications. The low carbon content prevents harmful chromium carbide formation in the heat-affected zone (HAZ), making it the preferred choice for fabricated equipment.

• General Corrosion: Excellent resistance to a wide range of acids and other corrosive media.

• Pitting Resistance Equivalent Number (PREN): ~25-26, same as standard 316, but with the added benefit of weld stability.

6. Available Product Range (Plates)

7. Typical Applications

• Chemical Processing: Welded pressure vessels, tanks, and piping for highly corrosive chemicals.

• Marine & Offshore: Welded structures and components exposed to seawater.

• Pharmaceutical & Biotech: High-purity process systems, reactors, and piping requiring superior corrosion resistance and cleanability.

• Pulp & Paper Industry: Bleach plants and chemical recovery systems.

• Architectural: Welded structures in highly corrosive coastal or industrial atmospheres.