ASTM A268 Steel Pipe – Seamless & Welded Ferritic/Martensitic Stainless Steel Tubing

Handa’s ASTM A268 Steel Pipes are precision-manufactured seamless and welded stainless steel tubes designed for use in high-temperature and corrosive environments. Conforming to ASTM A268 standards, these pipes are widely employed in industrial systems requiring reliable tubing for heat exchangers, boilers, superheaters, and condensers.

The specification covers a range of ferritic and martensitic stainless steel grades such as TP410, TP405, TP429, TP430, TP443, TP409, TP439, and TP444, chosen for their mechanical strength, corrosion resistance, and heat tolerance. Seamless tubes are produced by extrusion and subsequent cold drawing or rolling, while welded variants are formed from stainless steel strip or plate and welded longitudinally or spirally.

These tubes are available in various outer diameters and wall thicknesses and may be supplied with annealed pickled, bright annealed, or polished surface finishes. Each pipe undergoes rigorous mechanical and non-destructive testing to ensure compliance with tensile strength, hardness, ductility, and dimensional standards.

With excellent resistance to scaling and oxidation at elevated temperatures, ASTM A268 pipes offer long service life in thermally aggressive industrial environments. Their versatility makes them a reliable choice for heat-intensive and chemically demanding systems.

Specifications:

– Product Type: Seamless and Welded Stainless Steel Pipe
– Specification: ASTM A268
– Material Grades: TP410, TP405, TP429, TP430, TP443, TP409, TP439, TP444, and others
– Material Type: Ferritic and Martensitic Stainless Steels
– Manufacturing Method:
 – Seamless: Extruded and cold finished
 – Welded: Formed from strip/plate with longitudinal or spiral welding
– Size Range: As per ASTM A268 standard (customizable OD and WT)
– Surface Finishes:
 – Annealed and Pickled
 – Bright Annealed
 – Polished (as specified)
– Mechanical Properties:
 – Tensile Strength: Grade-dependent minimums
 – Elongation: Grade-dependent minimums
 – Hardness: Grade-specific maximums
– Testing & Inspection:
 – Tensile and Hardness Testing
 – Flattening Test
 – Eddy Current or Ultrasonic Testing (Non-Destructive)
 – Visual Inspection for Surface and Dimensional Accuracy
– Temperature Resistance: Excellent performance in high-temperature applications
– Corrosion Resistance: Moderate to high (depending on steel grade and finish)
– Applications:
 – Heat Exchangers
 – Boilers
 – Superheaters
 – Condensers
 – High-Temperature Piping Systems
– Compliance: Fully conforms to ASTM A268 specification

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