Seamless Carbon Steel Tubes For Cryogenic And Low-temperature Applications
Astm a556 cold-drawn seamless tubes deliver precision tolerances and strong mechanical properties for u‑tubes in superheaters and feedwater heaters.
Seamless Carbon Steel Tubes For Cryogenic And Low-temperature Applications
Astm a556 cold-drawn seamless tubes deliver precision tolerances and strong mechanical properties for u‑tubes in superheaters and feedwater heaters.
ASTM A334 Grade 6 Tubes are seamless carbon steel tubes designed for low-temperature service, offering exceptional toughness, corrosion resistance, and durability in environments above -45°C. Conforming to ASTM A334/ASME SA334 standards, these tubes are ideal for low-temperature piping in oil and gas, petrochemical, and power generation industries. With a maximum carbon content of 0.30% and manganese ranging from 0.29–1.06%, they provide superior performance in cryogenic and high-pressure systems.
Manufactured through seamless cold-drawn or cold-rolled processes, ASTM A334 Grade 6 Tubes undergo heat treatment (e.g., normalization at 845°C or higher) to enhance low-temperature toughness. Available in sizes from 3/4” to 3” (19.05 mm to 76.2 mm) with wall thicknesses from 1.65 mm to 6.5 mm, these tubes meet diverse project needs. They are subjected to rigorous tests, including flattening, flaring, hardness, impact, and hydrostatic or nondestructive electric tests, ensuring compliance with ASTM A334 standards. The carbon steel composition enhances abrasion resistance, making them suitable for seamless carbon steel tubes in harsh conditions.
These seamless carbon steel tubes excel in low-temperature environments due to their high tensile strength (min. 415 MPa) and yield strength (min. 240 MPa), along with excellent impact resistance. Surface treatments like oil-dip, varnish, or galvanization, and options for plain, beveled, or threaded ends, support versatile installation in industrial piping systems. Packaged in wooden boxes or bundles with plastic paper, they ensure secure, sea-worthy delivery. ASTM A334 Grade 6 tubes are a reliable choice for engineers seeking durable cryogenic tubes for extreme cold environments.
Addressing challenges like brittleness, corrosion, and high-pressure stress in low-temperature systems, ASTM A334 Grade 6 Tubes deliver exceptional performance, safety, and longevity. Their seamless design and robust composition make them ideal for critical applications in cryogenic and industrial settings.
Designed for reliable performance in environments above -45°C.
Carbon steel composition ensures durability in corrosive conditions.
Withstands wear in demanding low-temperature applications.
Seamless construction ensures strength under high pressure.
Supports plain, beveled, or threaded end configurations.
High durability reduces maintenance and replacement costs.
| Element | Grade 6 (%) |
|---|---|
| Carbon (C) | ≤0.30 |
| Manganese (Mn) | 0.29-1.06 |
| Phosphorus (P) | ≤0.025 |
| Sulfur (S) | ≤0.025 |
| Silicon (Si) | ≥0.10 |
| Property | Grade 6 |
|---|---|
| Tensile Strength, min (MPa) | 415 |
| Yield Strength, min (MPa) | 240 |
| Elongation, min (%) | 30 |
| Hardness, max (HRB) | 90 |
| Feature | ASTM A334 Grade 6 | ASTM A333 Grade 6 | ASTM A179 |
|---|---|---|---|
| Material Type | Carbon Steel | Carbon Steel | Low-Carbon Steel |
| Temperature Range | Low (Above -45°C) | Low (Above -45°C) | Low to Moderate |
| Corrosion Resistance | Good | Good | Moderate |
| Applications | Cryogenic, Pipelines | Pipelines, Boilers | Heat Exchangers |
| Tensile Strength (MPa) | 415 (min) | 415 (min) | 325 (min) |
| Yield Strength (MPa) | 240 (min) | 240 (min) | 180 (min) |
| Key Advantage | Low-temperature toughness | High strength in cold | Heat transfer efficiency |
ASTM A334 Grade 6 Tubes are widely used in industries requiring high toughness, corrosion resistance, and reliable performance in low-temperature environments.
Used in offshore rigs for reliable low-temperature piping in cold climates.
Employed in storage tanks for liquefied gases, ensuring seamless carbon steel tubes toughness.
Utilized in steam boilers, offering corrosion resistance in low-temperature conditions.
Applied in chemical plants for handling corrosive fluids in cold environments.
Used in industrial refrigeration, providing low-temperature piping durability.
Employed in refineries for low-temperature processes, offering abrasion resistance.
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