Description
Factory-Direct Rectangular Hollow Section Supply — 2,800+ specifications in ready stock across ASTM A500, EN 10219, and GB/T 3091 standards, shipped directly from our Jinan production facility with original mill test certificates for every batch.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | ASTM A500 Rectangular Hollow Section Tube |
| Product Type | Rectangular Steel Tube (Welded / ERW) |
| Steel Grade | Gr.B, S235, S275, S355, STK400 |
| Standard | ASTM A500, ASTM A53, GB/T 3091 |
| Section Shape | Rectangular |
| Size Range | 15mm×20mm – 700mm×800mm |
| Wall Thickness | 1 – 30 mm |
| Length | 5.8m / 6m / 11.8m / 12m / Random Length |
| Technique | ERW / Welded (Seamless available) |
| Surface Treatment | Black Painted / Galvanized / Varnish / Bare |
| Tolerance | ±1% |
| Ends | Plain |
| Application | Construction structures / Building frames / Curtain walls / Support tubes / Machinery structures / Fertilizer equipment |
| MOQ | 10 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Building | Building frames, curtain wall supports, commercial structure columns |
| Infrastructure & EPC | Solar farm mounting structures, wind turbine support bases, Belt & Road project frameworks |
| Machinery Manufacturing | Equipment structural frames, conveyor support tubes, agricultural machinery chassis |
| Industrial Facilities | Fertilizer plant pipe racks, warehouse portal frames, mezzanine support systems |
What Wall-Thickness Tolerance Costs on a Structural Frame Order
A 0.3mm deviation in wall thickness can trigger entire shipment rejection at project inspection.
Global buyers sourcing ASTM A500 rectangular hollow section tube frequently encounter quality uncertainty when suppliers deliver material with negative tolerance beyond acceptable limits. The theoretical weight calculation looks correct on paper, but actual measured thickness falls short, causing structural engineers to reject the batch during on-site verification. This creates a cascade of problems: project delays, penalty clauses activated, and the costly process of sourcing replacement material while the original container sits at port. [NEED_CITE: EN 10219 cold-formed hollow section dimensional tolerance requirements]
How ERW Welded RHS Matches Structural Engineering Requirements
The rectangular profile of ASTM A500 rectangular hollow section tube provides superior torsional resistance compared to open sections, making it ideal for building frames and machinery structures where multi-directional loading occurs. The flat surfaces simplify connection details—bolted or welded joints align naturally without complex gusset plates required for circular hollow sections. For curtain wall applications, the consistent external dimensions ensure uniform cladding attachment points across multiple production batches. Our ERW welding process maintains continuous production across three lines, delivering both standard sizes from ready stock and custom dimensions within typical production lead times.
Engineering Compliance and Certification Pathways
Structural projects requiring EN 10219 compliance for European markets demand Lloyd’s CE certification alongside mill test certificates documenting chemical composition and mechanical properties. The ASTM A500 rectangular hollow section tube in Gr.B serves North American specifications, while S355 grades meet EN 10210 requirements for higher load-bearing applications. Third-party inspection through SGS or BV verifies dimensional accuracy and weld integrity before shipment, preventing customs clearance delays caused by missing documentation. [NEED_CITE: steel grade equivalence between ASTM A500 and EN 10219 standards]
Steel Grade Selection and ERW Welding Technology
The progression from S235 to S355 represents increasing yield strength capacity—S235 suits light structural applications like curtain wall supports, while S355 handles heavy-load scenarios in portal frames and equipment bases. ASTM A500 Gr.B provides equivalent performance for projects following American standards, and JIS STK400 serves Japanese-specification contracts. ERW welding technology joins formed steel strip through high-frequency current, creating a continuous weld seam suitable for structural applications up to 30mm wall thickness. This process delivers cost efficiency compared to seamless alternatives while maintaining dimensional consistency across the 15mm×20mm to 700mm×800mm size range. Surface treatment selection depends on environmental exposure: hot-dip galvanizing protects against corrosion in outdoor infrastructure projects, while black painted or bare finishes serve indoor machinery applications where appearance matters less than structural performance.
Hidden Costs of Incorrect Rectangular Tube Procurement
Material supplied with wall thickness below specified tolerance creates structural safety concerns that only surface during load testing or inspection. Certification gaps—missing CE marks for European projects or incomplete mill certificates—result in customs holds that delay entire construction schedules. The true cost extends beyond replacement material: crane rental fees for unloading rejected containers, storage charges at port, and penalty payments for missed project milestones. [NEED_CITE: consequences of dimensional non-compliance in structural steel procurement]
Why Procurement Teams Source ASTM A500 RHS From Us
Factory-direct pricing eliminates trading company margins, with volume discount programs for partners placing recurring orders above 10 tons. Our in-house laboratory conducts three-stage inspection covering dimensional verification, weld seam testing, and chemical composition analysis, with original mill test certificates provided for every heat number. The 2,800+ specification inventory enables split shipments and urgent fulfillment without waiting for production slots. Lloyd’s CE certification (EN 10210/EN 10219) and ISO 9001:2015 quality management ensure documentation compliance across 50+ export markets. Professional export teams optimize container loading plans for mixed-size orders, maximizing payload while protecting surface treatments during ocean transit.
Documentation & Compliance
- Mill test certificate documenting Gr.B chemical composition and mechanical properties per ASTM A500
- Lloyd’s CE certificate confirming EN 10210/EN 10219 compliance for European market access
- ISO 9001:2015 quality management certificate covering all three production lines
- SGS or BV third-party inspection report verifying dimensional tolerance and weld quality
- Material traceability by heat number linking each tube to original steel coil certification
- Complete customs documentation package including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- ASTM A500 rectangular hollow section tubes bundled with steel strips and edge protectors to prevent surface damage during transit
- Galvanized RHS packaged with waterproof wrapping to preserve zinc coating integrity for ocean shipment
- Container loading optimization combining 6m and 11.8m lengths to maximize payload within 20ft and 40ft containers
- Plain ends protected with plastic caps to prevent moisture ingress and edge damage during handling
- Heat number and steel grade stenciled on each bundle for on-site identification and traceability
- FOB, CIF, and DDP shipping terms available with professional documentation handling for customs clearance
Initiating Your Rectangular Hollow Section Inquiry
Submit your specification requirements including dimensions, wall thickness, steel grade, quantity, and destination port to receive competitive bulk pricing within 12 hours. Our team provides mill test certificate samples and third-party inspection options before contract signing, ensuring material compliance with your project standards. Custom non-standard dimensions and flexible MOQ accommodate both trial orders and full-container bulk procurement.
Frequently Asked Questions
Q: What is the difference between ASTM A500 Gr.B and EN 10219 S355 for rectangular hollow sections?
A: ASTM A500 Gr.B follows American standards with minimum yield strength requirements, while S355 per EN 10219 meets European specifications with higher yield capacity. Both grades serve structural applications, but project specifications determine which standard applies. We supply both grades with appropriate mill test certificates for your market requirements.
Q: How do you verify wall thickness tolerance on ASTM A500 rectangular hollow section tube?
A: Our in-house laboratory conducts dimensional inspection using calibrated ultrasonic thickness gauges at multiple points along each tube. Third-party SGS or BV inspection is available upon request to provide independent verification before shipment. Original mill test certificates document compliance with ±1% tolerance standards.
Q: Can you supply non-standard dimensions outside the 15×20mm to 700×800mm range?
A: Custom dimensions are available with flexible MOQ starting from 10 tons. Non-standard sizes require typical production lead times for tooling adjustment and quality verification. We maintain ready stock for standard specifications to support urgent requirements while custom orders proceed through our three production lines.
Q: What surface treatment options are available for rectangular hollow sections?
A: We offer black painted finish for indoor applications, hot-dip galvanized coating for corrosion protection in outdoor environments, varnish for temporary protection during transit, and bare finish for projects requiring on-site painting. Surface treatment selection depends on environmental exposure and project specifications.
Q: Do you provide CE certification for European market compliance?
A: Yes, our ASTM A500 rectangular hollow section tube carries Lloyd’s CE certification per EN 10210 and EN 10219 standards. This certification, combined with ISO 9001:2015 quality management and original mill test certificates, ensures smooth customs clearance and project compliance across European markets.
Request Your ASTM A500 Rectangular Hollow Section Quote
Send your specifications via email or WhatsApp to receive bulk pricing, mill test certificate samples, and delivery schedules within 12 hours. Our export team handles complete documentation and container loading optimization for your project requirements.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxinjiyuan.com
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxinjiyuan.com
