1. Standard Designations

• UNS: S30403

• ASTM: A312/A312M (Seamless & Welded)

• ASTM: A358/A358M (EFW)

• ASTM: A269/A269M (Seamless & Welded)

• EN: 1.4307

• JIS: SUS 304L

2. Chemical Composition (% by weight)

3. Mechanical Properties

4. Corrosion Resistance

• General Corrosion: Excellent resistance to most oxidizing acids and atmospheric exposure

• Intergranular Corrosion: Superior resistance in welded condition compared to 304

• Pitting Resistance: Good performance in mild chloride environments

• PREN Value: ~19

5. Physical Properties

6. Product Range & Specifications

7. Available Types & Schedules

• Pipe Types: Seamless, ERW (Electric Resistance Welded), EFW (Electric Fusion Welded)

• Schedules: SCH 5S, SCH 10S, SCH 40S, SCH 80S

• Standards: ANSI/ASME B36.19M, ANSI/ASME B36.10M

8. Surface Finishes

• Annealed & Pickled: Standard mill finish

• Polished: Mechanical polished to 180G, 240G, 320G, etc.

• Electropolished: Mirror-like finish for high purity applications

• Bead Blasted: Uniform matte finish

9. Typical Applications

• Chemical and petrochemical processing

• Food and beverage processing equipment

• Pharmaceutical and biotech piping systems

• Heat exchangers and condenser tubes

• Architectural and structural applications

• Water treatment and distribution systems

Quality Assurance:

• Hydrostatic testing per standard requirements

• Eddy current or ultrasonic testing available

• Full traceability with material certificates

• PMI (Positive Material Identification) available

Technical Notes:

• Excellent welding characteristics without post-weld annealing

• Suitable for all standard welding methods

• Good formability and ductility

• Cost-effective solution for corrosive service applications

All pipes supplied with complete test certificates and meet relevant ASTM/ASME standards.