Astm A333 Gr.6 Seamless Pipe
ASTM A333 Grade 6 seamless pipe manufactured for low-temperature service, offering reliable impact toughness and mechanical performance for cryogenic and cold-environment applications.
Overview
ASTM A333 Grade 6 seamless pipe is designed for low-temperature service where impact toughness is critical. The specification covers nominal wall seamless ferritic steel pipe intended for applications exposed to subzero temperatures, including energy, industrial, and infrastructure systems.
Standard & Grades
ASTM A333 (ASME S/A-333) includes multiple ferritic steel grades for low-temperature service. Among these, Grade 6 is one of the most widely used due to its balanced strength, toughness, and weldability.
Size Range
| Nominal Size | 1/4 in. to 24 in. OD |
| Wall Thickness | Schedule 10 through XXH |
Chemical Composition – ASTM A333 Grade 6 (%)
| C | Mn | P | S | Si | Cr | Cu | Mo | Ni | Cb | V |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.30 | 0.29 – 1.06 | 0.025 | 0.025 | 0.10 min | 0.30 | 0.40 | 0.12 | 0.40 | 0.12 max | 0.08 max |
Mechanical Properties – ASTM A333 Grade 6
| Minimum Tensile Strength | 60,000 psi (415 MPa) |
| Minimum Yield Strength | 35,000 psi (240 MPa) |
Impact Test Requirements
| Test Type | Charpy V-Notch (CVN) |
| Minimum Test Temperature | -50 °F (-45 °C) |
Heat Treatment
ASTM A333 Grade 6 pipes are heat treated to control microstructure and ensure consistent low-temperature toughness and mechanical performance.
Typical Applications
ASTM A333 Gr.6 seamless pipes are commonly used in low-temperature piping systems, cryogenic services, oil and gas processing, petrochemical plants, and industrial installations operating in cold climates.