Tianjin Brisk Metalwork Co., Ltd. is one of the leading manufacturers and suppliers of astm a500 square box section in China. We have world-leading production equipment and strong manufacturing capabilities. Please feel free to buy bulk durable astm a500 square box section from our factory.
Tianjin Brisk Steel is one of the manufacturers of ASTM A500 Square Box Section / Square HSS / Square Hollow Section / ASTM A500 Square Tube / Cold-Formed Welded and Seamless Carbon Steel Structural Tubing 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.
Basic Definition & Standard
| Grade | Min Yield Strength | Min Tensile Strength | Market Positioning |
|---|---|---|---|
| Grade B | 46000 ksi (317 MPa) | 58000 ksi (400 MPa) | ✅Most versatile; for standard building frameworks and supports. |
| Grade C | 50000 ksi (345 MPa) | 62000 ksi (427 MPa) | ✅ Heavy-duty structures, bridges, and seismic projects |
| Grade D | 36000 ksi (250 MPa) | 58000 ksi (400 MPa) | Requires heat treatment, low order volume, special engineering project. |
Production Process
- ERW (Electric Resistance Welded – the mainstream method): Offers significant cost advantages and accounts for the vast majority of orders; options available to either remove or retain the internal weld bead.
- Seamless Square Tubing: Suitable for applications involving heavy wall thickness, high pressure, and high fatigue conditions; entails longer lead times and higher prices.
Size Range
- Side length range: 20×20mm – 500×500mm (custom sizes larger than this available)
- Wall thickness: 1.5mm – 50mm
- Standard lengths: 6m / 12m; cut-to-length service available
- Corner radius requirement: Outer corner radius ≤ 3 × wall thickness (ASTM mandatory requirement)
- Squareness tolerance (adjacent sides): Maximum allowable deviation 2°
Diverse surface finish options to meet various needs
- Black (bare/oiled) + anti-rust oil (standard delivery condition)
- Shot-blasted
- Painted
- Hot-dip galvanized (HDG) (35–100 μm)
- Pre-galvanized
ASTM A500 VS ASTM A501
- ASTM A500 covers cold-formed welded and seamless carbon steel structural tubing (SHS/RHS/CHS), the most popular hollow section standard for North American construction.
- ASTM A501 specifies hot-formed welded and seamless carbon steel structural tubing, mainly used for heavy-duty infrastructure with less market availability.
Comparison Table
| Item | ASTM A500 (Cold-Formed) | ASTM A501 (Hot-Formed) |
|---|---|---|
| Production Process | Formed at ambient temperature | Formed under high temperature |
| Market Popularity | Dominant, sufficient stock | Low demand, mostly custom orders |
| Standard Grades | Grade B (46 ksi), Grade C (50 ksi)Mechanical values differ between round & square/rectangular sections | Grade A (35 ksi), Grade B (40 ksi), Grade C (50 ksi)Uniform mechanical requirements for all shapes |
| Residual Stress | Cold forming creates residual stress | High-temperature forming eliminates residual stress, better ductility and weldability |
| Dimensional Tolerance | Strict tolerances; outer corner radius ≤ 3 × wall thickness | Wider tolerance range; no strict limitation on corner radius |
| Surface Condition | Smooth surface, ideal for exposed architectural components | Hot rolled black scale, rougher surface |
| Size Limitation | Restricted maximum perimeter | Supports extra-large & heavy-wall hollow sections |
| Typical Application | Building frames, columns, facades, support brackets, machinery bases, solar structures | Bridges, heavy load structures, low-temperature projects, dynamic load constructions |
Choose ASTM A500 if you need:
- General commercial and residential steel structures
- Exposed architectural elements with strict appearance requirements
- Precise dimensional control
- Static load applications under normal temperature
- Fast lead time and accessible stock supply
Choose ASTM A501 if you need:
- Heavy infrastructure and bridge construction
- Low-temperature environments or dynamic impact loads
- Extra-large sizes and heavy wall thickness
- Superior toughness, impact resistance and welding performance
FAQ
Q: Which grade should I choose, Grade B or Grade C?
A: Grade B is the most popular choice for general construction. Grade C features higher yield strength, suitable for heavy-duty, seismic and bridge structures.
Q: What documents can you provide for customs and project inspection?
A: We supply EN 10204 3.1 MTC as standard. EN 10204 3.2 and third-party inspection reports are available upon demand.
Q: Is ASTM A500 the same as ASTM A53 steel pipe?
A: No. ASTM A53 pipe is designed for fluid transportation. ASTM A500 is specially manufactured for structural load-bearing purposes and must not be mixed up.
Q: What is ASTM A500 Square Box Section?
A: ASTM A500 Square Box Section, also named Square HSS (Square Hollow Section), is cold-formed welded or seamless carbon steel structural tubing engineered for load-bearing applications, widely used in North American construction and mechanical engineering. It complies with ASTM A500/A500M specification.
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