ASTM A333 Gr 3, 7, 8, 9, 10, 11
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ASTM A333 / SA333 Gr 9

ASTM A333 / SA333 Gr 9

SpecificationDetails
StandardASTM A333 / ASME SA333
GradeGrade 8
Product TypeSeamless / Welded Low Temperature Alloy Steel Pipe
Outer Diameter (OD) / NBSmall diameter: 1/2" NB to 36" NB
Large diameter: up to 30" NB
Specific OD ranges: 19.05 mm to 114.3 mm, 20 mm to 215 mm, 16 mm to 914 mm
Wall Thickness & ScheduleDetermined by schedule number; higher schedules = thicker walls
Common schedules: SCH 20 to SCH XXS (heavier available on request)
Specific ranges: 2.0 mm to 14 mm, 2.0 mm to 50 mm (pipe), 0.5 mm to 15 mm (tubes)
Note: Excessive thickness may reduce low-temperature impact resistance
Available LengthsFixed lengths: 6,000 mm or 12,000 mm
Random lengths: Single (17’–24’) / Double (36’–44’)
Custom lengths available as per requirement
Heat TreatmentNormalized, Normalized & Tempered, or Quenched & Tempered
Pipe EndsPlain End (PE), Beveled End (BE), Threaded End (TE)
Surface FinishBlack Painted, Varnished, Anti-Rust Oil Coated, Galvanized, or as required
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ASTM A333 / ASME SA333 Grade 9 Low Temperature Steel Pipe

ASTM A333 / SA333 Gr 9 is a low-temperature alloy steel pipe specification designed for use in cryogenic and sub-zero environments. This grade contains 9% nickel, which provides excellent toughness, ductility, and impact resistance at temperatures as low as –196°C. Its high nickel content makes it ideal for LNG plants, cryogenic equipment, petrochemical industries, and offshore pipelines where extreme cold service is required.

Key Features

  • High nickel alloy content (approx. 9%) for cryogenic strength
  • Superior impact resistance at extremely low temperatures
  • Available in seamless and welded forms
  • Good fabricability and weldability
  • Extensively used in LNG, petrochemical, and offshore industries

Heat Treatment

  • Normalized
  • Quenched & Tempered
  • Normalized & Tempered

Applications

  • LNG plants and cryogenic storage tanks
  • Petrochemical and chemical processing
  • Offshore oil & gas pipelines
  • Shipbuilding and marine applications
  • Cryogenic heat exchangers and pressure vessels

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