Description
Factory-Direct ASTM A500 GR.B Supply — Every ASTM A500 GR.B square steel tube rolls off our own production lines with original mill test certificates, eliminating middleman markups for bulk structural buyers.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | ASTM A500 GR.B Square Steel Tube |
| Product Type | Square Hollow Section (SHS) |
| Steel Grade | Gr.B, S235, S275, S355, STK400 |
| Standard | ASTM A500, ASTM A53, GB/T3091 |
| Section Shape | Square |
| Size Range | 19mm × 19mm – 800mm × 800mm |
| Wall Thickness | 1 – 30 mm |
| Length | 5.8m / 6m / 11.8m / 12m / Random Length |
| Technique | ERW Welded / Seamless |
| Surface Treatment | Black Painting / Galvanized / Varnish / Bare |
| Tolerance | ±1% |
| Ends | Plain |
| Application | Construction structures, Building frames, Curtain wall supports, Structural frameworks, Machinery supports |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Commercial Construction | Building frames, column structures, roof trusses for warehouses and industrial halls |
| Facade Engineering | Curtain wall support tubes, cladding sub-frames, architectural exposed columns |
| Infrastructure | Bridge handrail posts, sound barrier frames, highway sign gantry structures |
| Machinery Manufacturing | Equipment bases, conveyor support frames, crane boom sections |
| Solar & Energy Projects | Solar panel mounting structures, substation framework supports |
What Missing Mill Certificates Cost on an ASTM A500 GR.B Shipment
A single untraceable heat number can strand an entire container at customs.
Project inspectors across the Middle East and Southeast Asia increasingly reject structural steel deliveries lacking original mill test certificates tied to specific heat numbers. When buyers source ASTM A500 GR.B square steel tube from fragmented suppliers, certificates often arrive incomplete, mismatched to delivered batches, or entirely absent — triggering customs holds, third-party re-inspection fees, and weeks of project delay. The cost of replacing a rejected shipment far exceeds any per-ton savings from an unverified source. [NEED_CITE: EN 10219 cold-formed hollow section compliance requirements for structural projects]
How ASTM A500 GR.B Square Steel Tube Matches Structural Frame Demands
The 19×19mm to 800×800mm side-length range covers everything from light-gauge curtain wall supports to heavy-load column sections in industrial buildings. Wall thickness from 1mm to 30mm allows engineers to balance weight against load-bearing requirements without switching suppliers. Our ASTM A500 GR.B square steel tube ships with ±1% dimensional tolerance, ensuring consistent fit-up during on-site welding and bolting operations. The combination of ERW welded and seamless manufacturing options lets procurement teams match budget constraints to structural pressure requirements within a single order.
Engineering Compliance and Certification Pathways
Structural frames designed under AISC or equivalent codes require verified material properties that trace back to the original heat. ASTM A500 GR.B square steel tube produced under our ISO 9001:2015 system carries Lloyd’s CE certification covering EN 10210 and EN 10219, satisfying both North American and European project specifications from a single production source. For corrosion-prone environments — coastal construction, chemical plants, agricultural structures — galvanized surface treatment extends service life without field-coating delays. Plain-end finishes arrive ready for site cutting, welding, and custom fabrication without additional preparation. [NEED_CITE: steel grade equivalence between ASTM A500 and EN 10210 standards]
Decoding Steel Grade Selection and Manufacturing Process
ASTM A500 GR.B sits within a family of structural grades including S235, S275, S355, and STK400, each offering progressively higher yield characteristics for different load scenarios. S235 suits light structural applications where weight optimization matters, while S355 handles heavier column and beam loads in multi-story construction. The ERW welded process delivers cost efficiency for standard structural sections with consistent seam integrity, while seamless options address applications demanding uniform strength around the entire cross-section. Surface treatment selection — black painted for indoor use, galvanized for outdoor exposure, bare for field-coating projects — directly affects both initial procurement cost and long-term maintenance budgets. Wall thickness tolerance held at ±1% ensures theoretical weight calculations match actual delivered mass, preventing budget overruns on tonnage-based contracts.
Hidden Costs of Procuring the Wrong Grade or Tolerance
Specifying S235 when structural calculations demand S355 creates safety margins that fail under load — a liability no project manager can absorb. Conversely, over-specifying high-grade material wastes budget on unnecessary performance. Negative tolerance beyond acceptable limits reduces actual wall thickness, compromising load capacity while inflating per-ton pricing since buyers pay for weight they do not receive. Missing or fraudulent mill certificates force costly third-party re-testing, delay customs clearance, and can halt entire project phases while compliance is resolved. [NEED_CITE: consequences of tolerance deviation in structural steel hollow sections]
Why Bulk Buyers Source ASTM A500 GR.B Square Steel Tube From Us
Our three production lines running simultaneously deliver monthly capacity exceeding 20,000 tons, supporting urgent project timelines without compromising quality control. Every ASTM A500 GR.B square steel tube batch undergoes three-stage in-house inspection in our own metallurgical laboratory before shipment, with original mill test certificates documenting chemical composition and mechanical properties for every heat number. We maintain ready stock across 2,800+ specifications in standard sizes, enabling split shipments and urgent replenishment without full production lead times. For projects requiring mixed specifications — combining square tubes, round pipes, beams, and plates — we consolidate multiple product categories into optimized container loads, reducing freight costs and simplifying customs documentation. SGS and BV third-party inspections are arranged on request, providing independent verification for quality-sensitive projects. Our professional export team handles complete documentation packages including certificates of origin, packing lists, and bills of lading, ensuring smooth customs clearance at destination ports across 50+ countries.
Documentation & Compliance
- Mill test certificate documenting ASTM A500 GR.B chemical composition and mechanical properties per heat number
- Lloyd’s CE certificate covering EN 10210 and EN 10219 for European project compliance
- ISO 9001:2015 quality management system certificate covering full production traceability
- SGS or BV third-party inspection report available upon request for independent quality verification
- Material traceability documentation linking each bundle to specific heat numbers and production dates
- Complete customs document package including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- ASTM A500 GR.B square steel tubes bundled with steel strips and edge protectors to prevent surface damage during ocean transit
- Galvanized finishes receive additional plastic wrapping to preserve zinc coating integrity throughout shipping and storage
- Container loading optimized by our logistics team to maximize payload within weight limits for 20ft and 40ft containers
- Custom cutting to 5.8m, 6m, 11.8m, or 12m lengths available, with random length options for cost-sensitive bulk orders
- Each bundle marked with heat number, steel grade, size specifications, and our factory identification for site traceability
- FOB, CIF, and DDP shipping terms available with real-time tracking and professional port coordination
Starting Your ASTM A500 GR.B Square Steel Tube Inquiry
Submit your specifications including side dimensions, wall thickness, steel grade, total quantity, and destination port to receive competitive bulk pricing within 12 hours. Our technical team reviews requirements to confirm availability from ready stock or provides production timelines for custom specifications. We arrange sample shipments and mill test certificate previews for quality verification before contract commitment.
Frequently Asked Questions
Q: What steel grades are available for ASTM A500 GR.B square steel tube?
A: We supply ASTM A500 GR.B alongside S235, S275, S355, and STK400 grades, allowing flexible structural design across different load requirements from a single production source.
Q: Can I get third-party inspection before shipment?
A: Yes, SGS and BV third-party inspections are arranged on request, with reports documenting dimensional accuracy, surface quality, and material properties for your quality records.
Q: What is the minimum order quantity for ASTM A500 GR.B square steel tube?
A: The minimum order quantity is 5 tons, supporting both trial orders for new specifications and full-container bulk procurement for ongoing projects.
Q: Do you provide mill test certificates with every shipment?
A: Every batch ships with original mill test certificates documenting chemical composition and mechanical properties, traceable to specific heat numbers for full material verification.
Q: Can you supply non-standard sizes or custom lengths?
A: Yes, beyond standard sizes from 19×19mm to 800×800mm, we produce custom specifications with typical production lead times, and offer cutting to your required lengths including 5.8m, 6m, 11.8m, and 12m.
Request Your ASTM A500 GR.B Square Steel Tube Quotation Today
Send your specifications, quantity, and destination port to receive factory-direct pricing with mill test certificates within 12 hours.
Email: admin@sdxinjiyuan.com
WhatsApp: +86 188 5315 7756
Website: www.sdxinjiyuan.com
