ASTM A334 Seamless Carbon and Alloy Steel Tubes
- OD: 3.2 – 76.2mm
- WT: 0.4 – 7.6mm
- Length: 3000 – 33000mm
ASTM A334 Seamless Carbon and Alloy Steel Tubes
Our ASTM A334 seamless carbon and alloy steel tubes are manufactured in accordance with the American Society for Testing and Materials (ASTM) standard A334, which specifies the requirements for seamless carbon and alloy steel tubes for low-temperature service. These tubes are designed to provide excellent strength, toughness, and resistance to brittle fracture in cryogenic environments. The seamless construction ensures that our tubes have a consistent wall thickness and internal diameter, making them suitable for use in demanding applications such as liquefied gas storage tanks, cryogenic piping systems, and low-temperature processing facilities. Our ASTM A334 seamless carbon and alloy steel tubes are available in Grades 1, 3, 6, and 8, each with its own specific composition and mechanical properties. The impact test temperature for each grade is as follows: Grade 1 and Grade 6 have a minimum impact test temperature of -45°C, Grade 3 has a minimum impact test temperature of -100°C, and Grade 8 has a minimum impact test temperature of -195°C. With their high strength-to-weight ratio, excellent toughness at low temperatures, and resistance to cracking and brittle fracture, our ASTM A334 seamless carbon and alloy steel tubes are an ideal choice for applications where extremely low temperatures prevail.
Chemical Composition of ASTM A334 Seamless Carbon and Alloy Steel Tubes
| Element | Grade 1 | Grade 3 | Grade 6 | Grade 8 |
| Carbon, max | 0.30% | 0.19% | 0.30% | 0.13% |
| Manganese | 0.40-1.06% | 0.31-0.64% | 0.29-1.06% | 0.90% max |
| Phosphorus, max | 0.025% | 0.025% | 0.025% | 0.030% |
| Sulfur, max | 0.025% | 0.025% | 0.025% | 0.030% |
| Silicon | 0.18-0.37% | 0.10% min | 0.10% min | 0.10% min |
| Nickel | – | – | – | 0.30-0.70% |
| Chromium | – | – | – | 0.25-0.45% |
| Molybdenum | – | – | – | 0.15-0.25% |
| Copper | – | – | – | 0.25-0.45% |
Mechanical Properties of ASTM A334 Seamless Carbon and Alloy Steel Tubes
| Property | Grade 1 | Grade 3 | Grade 6 | Grade 8 |
| Tensile Strength, min | 55 ksi (380 MPa) | 65 ksi (450 MPa) | 60 ksi (415 MPa) | 65 ksi (450 MPa) |
| Yield Strength, min | 30 ksi (205 MPa) | 35 ksi (240 MPa) | 35 ksi (240 MPa) | 37 ksi (255 MPa) |
| Elongation, min | 30% | 30% | 30% | 28% |
Specifications
| Product Name | ASTM A334 Seamless Carbon and Alloy Steel Tubes |
| Grade | Grade 1, Grade 3, Grade 6, Grade 8 |
| Thickness | 3.2 – 76.2 mm |
| Outer Diameter | 0.4 – 7.6 mm |
| Length | 3000 – 33000m |
| Ends finish | Plain Ends |
| Packing | Plastic Caps, Small Diameters Bundled or Packed in Wooden Crates, Large Diameters Bundled and Covered with Seaworthy Bags |
| Surface Finish | Bright Finish, Oiled |
| Delivery Condition | Annealed |
| Type of Tubes | Straight Tubes, U-Tubes |
| Technique | Seamless Cold Drawn |
| Place of Origin | Made in China |
| MOQ | 3 Tons/Size |
| Transportation | Railway, By Sea |
Applications of ASTM A334 Seamless Carbon and Alloy Steel Tubes
ASTM A334 seamless carbon and alloy steel tubes are designed for low-temperature applications and are widely used in industries requiring high toughness at low temperatures.
Heat Exchangers and Condensers: Ideal for use in heat exchangers and condensers where low-temperature resistance is critical.
Boilers: Utilized in boiler systems due to their ability to withstand low temperatures.
Chemical and Petrochemical Industries: Used for transporting fluids and gases in low-temperature conditions.
Refrigeration Systems: Employed in refrigeration due to their durability in cold environments.
Industrial Processes: Suitable for various industrial processes requiring high strength and low-temperature resilience.
