ASTM A269 TP 317L Seamless Tubes

ASTM A269 TP 317L Seamless Tubes

ASTM A269 TP 317L Seamless Tubes are low-carbon, high molybdenum austenitic stainless steel tubes designed for enhanced corrosion resistance in aggressive chemical environments. The higher molybdenum content compared to 316L provides superior resistance to pitting and crevice corrosion, particularly in chloride-rich conditions.

These seamless tubes are widely used in instrumentation lines, chemical processing equipment, and heat exchangers where improved corrosion resistance and reliable mechanical properties are required.

Specifications

Standard	ASTM A269
Grade	TP 317L
Manufacturing Process	Seamless (Cold Drawn)
Outside Diameter	6 mm to 50.8 mm
Wall Thickness	0.5 mm to 6 mm
Length	Up to 6 Meters / Custom Length
Surface Finish	Annealed & Pickled, Bright Annealed
End Type	Plain End

Key Benefits

• High Molybdenum Content: Superior resistance to pitting and crevice corrosion.
• Low Carbon Composition: Minimizes intergranular corrosion after welding.
• Excellent Chemical Resistance: Performs well in acidic and chloride environments.
• Improved Strength: Suitable for moderate high-temperature applications.
• Good Weldability & Fabrication: Easy to form and weld for various industrial uses.
• Long-Term Durability: Reliable performance in demanding service conditions.

Chemical Composition (Typical)

Element	317L (%)
Carbon	0.03 Max
Chromium	18.0 – 20.0
Nickel	11.0 – 15.0
Molybdenum	3.0 – 4.0
Manganese	2.0 Max

Applications

• Chemical Processing Plants
• Petrochemical Industry
• Oil & Gas Equipment
• Heat Exchangers & Condensers
• Pharmaceutical Industry
• Instrumentation Tubing Systems

Quality Testing

• Hydrostatic or Air Underwater Testing
• Ultrasonic Testing (UT)
• Eddy Current Testing
• Tensile & Hardness Testing
• Dimensional & Visual Inspection

Conclusion

ASTM A269 TP 317L Seamless Tubes offer enhanced corrosion resistance compared to standard austenitic grades, making them ideal for aggressive chemical and marine environments. Their seamless construction, superior molybdenum content, and low carbon composition ensure long service life and dependable performance in critical applications.