Tianjin Brisk Steel is one of the manufacturers of ASTM A572 Circular Hollow Section in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.
Why Choose Our Straight Weld Steel Pipes?
The ASTM A572 specification is divided into several grades, with Grade 50 (345 MPa) being the most widely utilized in international construction. Here is why this material stands out in international markets:
Weight Reduction: The high yield strength allows you to utilize thinner walls and lighter sections, reducing overall steel tonnage, lowering freight costs, and easing installation.
Exceptional Weldability: Thanks to its low carbon chemistry, ASTM A572 CHS can be easily welded on-site or in the shop using standard commercial welding processes without extensive preheating.
Excellent Formability: It maintains good notch toughness and ductility, making it highly workable for various structural fabrication requirements.
Cost Efficiency: It offers a significant strength upgrade over ASTM A36 at a highly competitive price point, providing the best value per megapascal of strength.
Technical Specifications & Size Range
We manufacture and supply ASTM A572 CHS across a broad range of sizes, ensuring a perfect fit for your specific project requirements:
| Parameter | Specification / Capability |
| Standard | ASTM A572 / A572M |
| Available Grades | Grade 42, Grade 50, Grade 55, Grade 60, Grade 65 |
| Outside Diameter (OD) | 21.3mm to 1219.2mm (1/2" to 48") |
| Wall Thickness (WT) | 2.0mm to 50.0mm (SCH 20, SCH 40, SCH 80, SCH XS, SCH XXS, etc.) |
| Length | 5.8m, 6m, 11.8m, 12m, or customized fixed lengths |
| Surface Treatment | Bare, Black Vanished/Paint, 3LPE, FBE, Hot-Dip Galvanized |
Mechanical Properties (Grade 50)
Minimum Yield Strength: 345MPa (50,000)
Minimum Tensile Strength: 450MPa (65,000psi)
Elongation: Min 18% to 21% (depending on product thickness)
Key Applications of ASTM A572 Round Structural Tubing
Due to their omnidirectional strength (equal resistance to bending in all directions), our circular hollow sections are highly versatile:
Building Frameworks: Columns, trusses, portals, and space frames for airports, stadiums, and exhibition centers.
Infrastructure & Bridges: Structural bridge piers, pedestrian walkways, and highway sign supports.
Energy & Power: Transmission towers, wind turbine foundations, and solar tracking racks.
Heavy Machinery: Boom arms for cranes, chassis components, and offshore structural components.
Strict Quality Control & Global Compliance
We prioritize your project's safety. Every batch of our ASTM A572 structural round tubes undergoes rigorous testing to guarantee full compliance with ASTM standards:
Chemical & Mechanical Testing: Verified by standard destructive laboratory testing.
Dimensional Inspections: Strict adherence to tolerances for outer diameter, wall thickness, and straightness.
Non-Destructive Testing (NDT): Hydrostatic testing, Eddy Current, or Ultrasonic testing options available.
Traceable Documentation: All shipments are issued with a Mill Test Certificate (MTC) according to EN 10204 3.1, detailing exact chemical compositions and mechanical results.
Frequently Asked Questions (FAQs)
FAQ
Q: What is the difference between ASTM A572 Grade 50 and ASTM A36?
A: The primary difference is the strength. ASTM A572 Grade 50 has a minimum yield strength of 50,000 psi (345MPa), whereas ASTM A36 has a yield strength of 36,000psi(250MPa). A572 Grade 50 allows you to design structures with smaller, lighter profiles while supporting the same load as a heavier A36 profile.
Q: Can ASTM A572 CHS be hot-dip galvanized?
A: Yes, absolutely. ASTM A572 Grade 50 is excellent for hot-dip galvanizing. We control the silicon content carefully during production to ensure a uniform, highly adherent zinc coating that provides long-lasting atmospheric corrosion resistance in outdoor and marine environments.
Q: How do you protect the circular hollow sections from rusting during long ocean voyages?
A: To prevent surface oxidation during international sea transit, we apply a high-quality anti-rust oil or black varnish coating to the exterior. For premium protection, we can wrap the pipe bundles in heavy-duty waterproof plastic/PVC sheets and protect the tube ends with plastic caps.
Q: Do you support third-party inspections (TPI)?
A: Yes, we fully welcome and accommodate inspections by world-recognized third-party agencies such as SGS, Bureau Veritas (BV), TÜV, or Intertek to verify material quality, dimensions, and loading compliance prior to dispatch.
Contact Us
If you are interested in our ASTM A572 Circular Hollow Section, please contact us with your specific requirements (specifications, quantity, material, surface treatment, etc.), and we will provide you with a detailed quotation and product sample as soon as possible. We look forward to establishing long-term cooperative relationships with you!!
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