Description
Product Description ASTM A334 Seamless Tube
ASTM A334 is a standard specification for seamless and welded carbon and alloy steel tubes designed specifically for low-temperature service. These tubes are highly valued across various industries for their exceptional strength, durability, and ability to withstand low-temperature environments. This comprehensive guide explores the features, specifications, applications, and benefits of ASTM A334 carbon steel seamless tubes.
ASTM A334 Seamless Tube Dimensions
Nominal Size (inches) | Outer Diameter (OD) (mm) | Wall Thickness (WT) (mm) | Length |
---|---|---|---|
1/4" | 13.72 | 1.65 | 6m / Custom |
3/8" | 17.15 | 1.65 | 6m / Custom |
1/2" | 21.34 | 2.11 | 6m / Custom |
3/4" | 26.67 | 2.11 | 6m / Custom |
1" | 33.40 | 2.77 | 6m / Custom |
1 1/4" | 42.16 | 2.77 | 6m / Custom |
1 1/2" | 48.26 | 2.77 | 6m / Custom |
2" | 60.33 | 3.38 | 6m / Custom |
2 1/2" | 73.03 | 3.68 | 6m / Custom |
3" | 88.90 | 3.91 | 6m / Custom |
3 1/2" | 101.60 | 4.19 | 6m / Custom |
4" | 114.30 | 4.50 | 6m / Custom |
5" | 141.30 | 5.16 | 6m / Custom |
6" | 168.28 | 5.49 | 6m / Custom |
ASTM A334 Chemical Composition
Element | Grade 1 | Grade 6 |
---|---|---|
Carbon (C) | 0.30 max | 0.30 - 0.61 |
Manganese (Mn) | 0.40 - 1.06 | 0.29 - 1.06 |
Phosphorus (P) | 0.025 max | 0.025 max |
Sulfur (S) | 0.025 max | 0.025 max |
Silicon (Si) | 0.10 min | 0.10 min |
ASTM A334 Mechanical Properties
Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
---|---|---|---|
Grade 1 | 380-550 | 205 min | 30 min |
Grade 6 | 415-585 | 240 min | 30 min |
Manufacturing Process
The seamless manufacturing process ensures uniformity and superior quality in ASTM A334 tubes. The process involves:
- Selection of Raw Material: High-quality billets or blooms are selected based on the required grade.
- Hot Rolling: The raw material is heated and passed through rolling mills to achieve the desired size and shape.
- Piercing and Sizing: A piercing rod creates the hollow section, and further sizing operations ensure precise dimensions.
- Heat Treatment: Heat treatment processes like annealing or normalizing enhance ductility and toughness.
- Testing and Inspection: Tubes undergo rigorous testing, including tensile testing, impact testing, and non-destructive testing (NDT), to ensure compliance with ASTM standards.
Grades of ASTM A334 Tubes
ASTM A334 tubes are available in multiple grades, each tailored for specific applications. Common grades include:
- Grade 1: Standard carbon steel with good mechanical properties.
- Grade 6: Enhanced manganese content for improved toughness and strength.
- Grade 7: Similar to Grade 6 with additional silicon for enhanced performance.
Benefits of Using ASTM A334 Carbon Steel Seamless Tubes
- Reliability in Extreme Conditions: Designed to perform in sub-zero temperatures without compromising structural integrity.
- Versatility: Suitable for a wide range of industrial applications.
- Cost-Effective: Offers an excellent balance between performance and cost compared to alternative materials.
- Customizability: Available in various sizes, wall thicknesses, and grades to meet specific project requirements.
Testing Standards
To ensure quality and performance, ASTM A334 tubes are subjected to stringent testing protocols, including:
- Hydrostatic Testing: Ensures the tube can withstand the required pressure without leakage.
- Tensile Testing: Verifies mechanical properties like tensile and yield strength.
- Impact Testing: Confirms the tube’s toughness at low temperatures.
- Dimensional Inspection: Checks for adherence to specified dimensions and tolerances.
- Non-Destructive Testing (NDT): Includes ultrasonic and radiographic testing to detect internal flaws.
Surface Finish
The surface finish of ASTM A334 tubes is critical for certain applications. Options include:
- Bare: Standard finish with no additional coatings.
- Galvanized: Provides enhanced corrosion resistance.
- Polished: For aesthetic and functional purposes in specific applications.
Conclusion
ASTM A334 seamless tubes are specifically designed for low-temperature applications, offering robust performance in environments where temperatures can reach extremely cold conditions. Available in grades 1 and 6, these tubes are manufactured to meet ASTM standards, ensuring high reliability, durability, and resistance to corrosion.
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