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ASTM A333 / SA333 Gr 4

ASTM A333 / SA333 Gr 4

SpecificationDetails
StandardASTM A333 / ASME SA333
GradeGrade 4
Product TypeSeamless / Welded Low Temperature Carbon Steel Pipe
Nominal Pipe Size (NPS)1/8" to 30" (DN 6 to DN 750)
Outer Diameter (OD)Ranging from 10.13 mm to 1219 mm (NPS 1/8" to NPS 20") and larger
Wall ThicknessFrom SCH 10 up to SCH 160 and XXS; heavier thicknesses available upon request
Available LengthsSingle random: approx. 17'–24'
Double random: approx. 36'–44'
Custom/fixed lengths also available
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 / SA333 Gr 4 Low Temperature Carbon Steel Pipe

ASTM A333 Gr 4 is a low-temperature carbon steel pipe designed for use in sub-zero environments. Part of the ASTM A333 / ASME SA333 specification, Grade 4 provides high strength and toughness, making it ideal for cryogenic and other low-temperature applications in the oil & gas, chemical, and power industries.

Key Features

  • Low-temperature service suitability
  • Excellent impact toughness at sub-zero temperatures
  • Good weldability and formability
  • Available in seamless and welded types
  • Suitable for cryogenic pipelines, LNG applications, and industrial piping

ASTM A333 / SA333 Gr 4 Chemical Composition

Element Composition (%)
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
Nickel (Ni) 3.18 – 3.82

ASTM A333 / SA333 Gr 4 Mechanical Properties

Property Requirement
Tensile Strength (MPa) 485 min
Yield Strength (MPa) 260 min
Elongation (%) 30 min
Impact Test (–45°C) Required (Charpy V-Notch)

Heat Treatment

  • Pipes are supplied in normalized, normalized & tempered, or quenched & tempered condition depending on application requirements.

Applications

  • Cryogenic Pipelines: Transportation of LNG, liquid nitrogen, and other cryogenic fluids
  • Oil & Gas Industry: Pipelines, storage tanks, and processing units operating at low temperatures
  • Chemical & Petrochemical Plants: Process piping and storage vessels for low-temperature chemicals
  • Power Generation: Low-temperature boilers, heat exchangers, and condensers
  • Shipbuilding & Offshore: Subsea pipelines, LNG carriers, and offshore structures
  • Refineries: Low-temperature process piping and storage systems

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