ASTM A333 Grade 6 Seamless Pipe Specifiction

ASTM A333 Grade 6 Seamless Pipe Specifiction

ASTM A333 Grade 6 seamless pipe is a carbon steel pipe specifically designed for low-temperature service.
This page provides the complete ASTM A333 Grade 6 Seamless Pipe Specification PDF, covering chemical composition, mechanical properties, dimensions, testing requirements, and typical applications.

ASTM A333 Standard

ASTM A333 is the standard specification for seamless and welded carbon and alloy steel pipes intended for low-temperature service. Pipes produced under ASTM A333 are designed to maintain adequate toughness and impact resistance at subzero operating temperatures.

Material Grade: ASTM A333 Grade 6

  • Standard: ASTM A333 / ASME SA333

  • Grade: 6

  • Material Type: Carbon Steel for Low-Temperature Service

  • Manufacturing Method: Seamless

  • Product Form: Steel Pipes

  • Typical Impact Test Temperature: −46°C (−50°F)

ASTM A333 Grade 6 seamless pipes are engineered to retain ductility and toughness in cold environments where standard carbon steel pipes may become brittle.

Chemical Composition (Typical, %).

Element Requirement (% max/min)
Carbon (C) 0.30 max
Manganese (Mn) 0.29–1.06
Phosphorus (P) 0.025 max
Sulfur (S) 0.025 max
Silicon (Si) 0.10 min
Nickel (Ni) 0.40 max
Chromium (Cr) 0.30 max
Copper (Cu) 0.40 max
Vanadium (V) 0.08 max
Columbium (Nb) 0.02 max
Molybdenum (Mo) 0.12 max

Mechanical Properties (Minimum Requirements)

Property Requirement
Tensile Strength ≥ 60,000 psi (415 MPa)
Yield Strength ≥ 35,000 psi (240 MPa)
Elongation ≥ 8 mm WT (Longitudinal) 30 %
Elongation ≥ 8 mm WT (Transverse) 16.5 %
Elongation – 2 in / 50 mm specimen 22 % (L) / 12 % (T)

Manufacturing Process

ASTM A333 Grade 6 seamless pipes are manufactured by hot rolling or hot extrusion, followed by appropriate heat treatment as required by the specification. The seamless manufacturing process ensures uniform structure, consistent wall thickness, and improved pressure resistance.

Dimensions & Tolerances

ASTM A333 Grade 6 seamless pipes are supplied in a wide range of sizes and wall thicknesses.

Standard Sizes:

  • Outside Diameter: NPS 1/8” – 36”

  • Wall Thickness: SCH 10, SCH 20, SCH 40, SCH 80, XS, XXS

  • Length: Random length or fixed length

Applicable Standards:

  • ASTM A333 / A333M

  • ASME B36.10M

  • ASME B31.3 / B31.8 (application dependent)

General dimensional requirements are usually governed by ASTM A999 / A999M unless otherwise specified.

Testing & Inspection

Each ASTM A333 Grade 6 seamless pipe may be subjected to:

  • Chemical analysis

  • Tensile testing

  • Charpy V-notch impact testing

  • Hydrostatic testing or non-destructive testing (UT / ET)

  • Dimensional and visual inspection

Mill Test Certificates (EN 10204 3.1) are typically supplied.

Download ASTM A333 Grade 6 Seamless Pipe Specification PDF

Download the complete ASTM A333 Grade 6 Seamless Pipe Specification PDF, including chemical composition limits, mechanical requirements, impact testing criteria, and dimensional references.

👉 Download astm_a333_grade_6_seamless_pipe_specification pdf

👉 Download astm a333 standard specification pdf

👉 Download asme sa333 standard specification pdf

ASTM A333 Grade 6 Pipes FAQ

Q1: Is ASTM A333 Grade 6 suitable for low-temperature service?
Yes. ASTM A333 Grade 6 is specifically designed for low-temperature applications and requires mandatory impact testing.

Q2: What is the difference between ASTM A333 Grade 6 and ASTM A106 Grade B?
ASTM A333 Grade 6 is intended for low-temperature service, while ASTM A106 Grade B is designed for high-temperature applications.

Q3: Is ASTM A333 Grade 6 available in seamless pipe only?
ASTM A333 covers both seamless and welded pipes; however, seamless pipes are more commonly used for critical and low-temperature applications.

A333 Gr.6 vs A106 Gr.B – FAQ

Q1: Can ASTM A106 Grade B replace ASTM A333 Grade 6?
No. ASTM A106 Gr.B does not guarantee low-temperature impact performance.

Q2: Is ASTM A333 Grade 6 more expensive than A106 Grade B?
Yes. A333 Gr.6 is more expensive due to stricter chemical limits and mandatory impact testing.

Q3: Are the dimensions the same for A333 Gr.6 and A106 Gr.B?
Yes. Both generally follow ASME B36.10M for dimensions.

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