ASTM A333 _ SA333 Gr 1, 6,
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ASTM A333 / SA333 Gr 1

ASTM A333 Gr 1

SpecificationDetails
StandardASTM A333 / ASME SA333
GradeGrade 1
Product TypeSeamless / Welded Low Temperature Carbon Steel Pipe
Size Range1/2" up to 36"
Wall Thickness2.0 mm to 60 mm
LengthSingle Random: Approximately 17' to 24'
Double Random: Approximately 36' to 44'
Fixed Lengths: Up to 18 meters (nearly 60 feet)
Custom Lengths: Specific lengths can be ordered to meet project requirements
Outer Diameter19.05 mm to 457 mm (0.75 in to 18 in)
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 / SA333 Grade 1 Low Temperature Carbon Steel Pipe

ASTM A333 / SA333 Grade 1 is part of the ASTM A333 / ASME SA333 specification, which covers seamless and welded carbon and alloy steel pipes intended for low-temperature service. Grade 1 offers excellent toughness and impact resistance at sub-zero temperatures, making it suitable for cryogenic and low-temperature piping applications.

Key Features

  • Designed for low-temperature service
  • Excellent impact toughness
  • Good weldability and formability
  • Supplied in seamless and welded types
  • Used in industries requiring cryogenic applications

Sizes

Nominal Pipe Size (NPS) Outer Diameter (OD) [in] Outer Diameter (OD) [mm] Schedule (SCH) Wall Thickness [in] Wall Thickness [mm]
1/2″ 0.840 21.3 SCH 40 (STD) 0.109 2.77
SCH 80 (XS) 0.147 3.73
1″ 1.315 33.4 SCH 40 (STD) 0.133 3.38
SCH 80 (XS) 0.179 4.55
2″ 2.375 60.3 SCH 40 (STD) 0.154 3.91
SCH 80 (XS) 0.218 5.54
4″ 4.500 114.3 SCH 40 (STD) 0.237 6.02
SCH 80 (XS) 0.337 8.56
6″ 6.625 168.3 SCH 40 (STD) 0.280 7.11
SCH 80 (XS) 0.432 10.97
8″ 8.625 219.1 SCH 40 (STD) 0.322 8.18
SCH 80 (XS) 0.500 12.70
10″ 10.750 273.1 SCH 40 (STD) 0.365 9.27
SCH 80 (XS) 0.500 12.70
12″ 12.750 323.9 SCH 40 (STD) 0.375 9.53
SCH 80 (XS) 0.500 12.70

ASTM A333 / SA333 Gr 1 Chemical Composition

Element Percentage (%)
Carbon (C) 0.30 max
Manganese (Mn) 0.40–1.06
Phosphorus (P) 0.025 max
Sulfur (S) 0.025 max
Silicon (Si) 0.10 min

ASTM A333 / SA333 Gr 1 Mechanical Properties

Property Requirement
Tensile Strength (MPa) 380 min
Yield Strength (MPa) 205 min
Elongation (%) 30 min
Impact Test Required at –45°C

Heat Treatment

  • Pipes are normally heat-treated by normalizing, normalizing and tempering, or quenching and tempering, depending on application requirements.

Applications

  • LNG and cryogenic service
  • Oil & Gas pipelines
  • Chemical plants
  • Power generation equipment
  • Refineries

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