ASTM A269 TP 304/304L Seamless Tubes

ASTM A269 TP 304/304L Seamless Tubes

ASTM A269 TP 304/304L Seamless Tubes are austenitic stainless steel tubes designed for general corrosion-resistant and low to moderate temperature service. These tubes are widely used in instrumentation, heat exchangers, and hydraulic systems.

Grade 304 offers excellent corrosion resistance and mechanical strength, while 304L (low carbon version) provides improved weldability and enhanced resistance to intergranular corrosion after welding.

Specifications

Standard	ASTM A269
Grade	TP 304 / TP 304L
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

• Excellent Corrosion Resistance: Suitable for a wide range of atmospheric and chemical environments.
• Good Weldability: 304L grade minimizes carbide precipitation during welding.
• High Strength & Durability: Offers reliable mechanical performance.
• Smooth Surface Finish: Ideal for instrumentation and sanitary applications.
• Good Formability: Easy to bend, fabricate, and install.
• Cost-Effective Solution: Economical choice for general-purpose stainless tubing.

Chemical Composition (Typical)

Element	304 (%)	304L (%)
Carbon	0.08 Max	0.03 Max
Chromium	18.0 – 20.0	18.0 – 20.0
Nickel	8.0 – 11.0	8.0 – 12.0

Applications

• Instrumentation Tubing
• Heat Exchangers
• Hydraulic & Pneumatic Systems
• Chemical Processing Equipment
• Food & Beverage Industry
• Pharmaceutical Processing

Quality Testing

• Hydrostatic or Air Underwater Testing
• Non-Destructive Testing (NDT)
• Hardness & Tensile Testing
• Flattening Test
• Dimensional Inspection

Conclusion

ASTM A269 TP 304/304L Seamless Tubes offer excellent corrosion resistance, reliable mechanical strength, and superior surface finish. Their versatility and cost-effectiveness make them one of the most widely used stainless steel tubing solutions across various industries.