ASTM A333/334 Gr 6 Steel Pipe
ASTM A333 and ASTM A334 are both specifications for seamless and welded carbon and alloy steel pipes used for low-temperature service. Specifically, ASTM A333 covers a range of steel grades suitable for temperatures as low as -50°F (-45°C), while ASTM A334 is intended for temperatures as low as -150°F (-101°C).
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ASTM A333 and ASTM A334 are standards for seamless and welded carbon and alloy steel pipe for cryogenic environments. These steel pipes have excellent corrosion resistance and are suitable for applications such as cryogenic pressure vessels and heat exchangers in the ambient range of -45°C to -195°C.
The number of steel pipe grades in the ASTM A333 and ASTM A334 standards is different. The ASTM A334 standard has 7 grades: Grade 1, Grade 3, Grade 6, Grade 7, Grade 8, Grade 9, and Grade 11; There are 9 grades in the ASTM A333 standard: Level 1, Level 3, Level 4, Level 6, Level 7, Level 8, Level 9, Level 10, Level 11. Of these grades, Grades 3 and 6 are the most commonly used grades specified in ASTM A333 and ASTM A334.
ASTM A333 and ASTM A334 standards are mainly developed for harsh and critical engineering applications. They can be mainly used in production, washing, purification, desulfurization, degreasing and other processes, as well as in low-temperature cold storage, pipelines for transporting low-temperature liquefied gas, and deep-seated liquefied petroleum gas. In applications such as cold separation equipment and air separation equipment. In addition, these steel pipes are often used in the manufacture of components for the pharmaceutical industry.
Product Properties
Chemical Requirements for ASTM A334 Seamless Tubes
| Grade | Mfg. Process | Chemical composition(%) | ||||||||
| C | Si | Mn | P | S | Ni | Cr | Mo | Others | ||
| Grade 1 | S, E, AT | 0.30Max | - | 0.40~1.06 | 0.05Max | 0.60Max | - | - | - | (STBL450) |
| Grade 3 | S, E, AT | 0.19Max | 0.18~0.37 | 0.31~0.64 | 0.05Max | 0.050Max | 3.18-3.82 | - | - | - |
| Grade 6 | S, E, AT | 0.30Max | 0.10Max | 0.29~1.06 | 0.048Max | 0.058Max | - | - | - | - |
STM A333/334 Grade 6 Chemical Composition
| Materials | C | Si | Mn | P | S | Cr | Ni |
| Grade 6 | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.025 | ≤0.025 | / | / |
ASTM A333/334 Grade 6 Mechanical Property
| Grade | Tensile Strength (MPa） | Yield Point (MPa) | Elongation (%) | |
| Y | X | |||
| Grade 6 | ≥415 | ≥240 | ≥30 | ≥16.5 |
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2.Q.Can your products be customized?
A.Yes, we can produce and process according to your requirements.
3.Q: How do your guarantee the quality?
A: Before mass production, there must be pre-production samples; before shipment, there must be final inspection.
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