Description
Full-Range SHS/RHS Stock — 2,800+ specifications from 19×19mm to 800×800mm covering ASTM A500, EN 10219, and AS/NZS 1163 ready for immediate dispatch.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | ASTM A500 / EN 10219 / EN 10210 / AS/NZS 1163 Square and Rectangular Hollow Section |
| Product Type | Square / Rectangular Steel Tube (SHS / RHS / HSS) |
| Steel Grade | Gr.B, S235, S275, S355, STK400, Q235B, Q345B |
| Standard | ASTM A500, ASTM A53, EN 10219, EN 10210, AS/NZS 1163, GB/T 3091, JIS G3466 |
| Section Shape | Square / Rectangular |
| 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 | Steel structures / Construction frames / Curtain wall / Support tubes / Building structures / Machinery / Scaffolding |
| MOQ | 5 Tons |
| Origin | China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Steel Fabricators | Structural frames, support columns, bracing members for warehouse and industrial buildings |
| Construction Companies | Curtain wall systems, high-rise building structures, scaffolding uprights |
| Machinery Manufacturers | Equipment bases, conveyor frames, crane support tubes |
| EPC Contractors | Bridge support frameworks, infrastructure reinforcement, modular building skeletons |
Cross-Standard Grade Mapping That Prevents Customs Rejection
Ordering S355J2H to EN 10219 while your engineer specified ASTM A500 Gr.B creates documentation mismatches that hold containers at port.
When buyers source an ASTM A500 EN 10219 square and rectangular hollow section supplier for multi-market projects, the most frequent bottleneck is not price — it is grade equivalence confusion between EN, ASTM, AS/NZS, and GB systems. A shipment labelled S355JRH per EN 10219 arriving at a North American job site where the structural drawings call for Gr.B per ASTM A500 will fail third-party inspection regardless of whether the mechanical properties actually overlap [NEED_CITE: steel grade equivalence between EN 10219 and ASTM A500 standards]. Missing or mismatched mill test certificates compound the problem: customs authorities in the Middle East and Africa increasingly cross-check heat numbers against declared grades before releasing cargo [NEED_CITE: EN 10219 cold-formed hollow section documentation requirements].
Matching Section Profiles to Structural Load Paths
Square and rectangular hollow sections from 19×19mm up to 800×800mm serve fundamentally different roles depending on wall thickness and steel grade selection. A 50×50×2.0 SHS in S235 works well for non-load-bearing curtain wall mullions, while a 300×200×12 RHS in S355 carries primary beam loads in warehouse frames. As an ASTM A500 EN 10219 square and rectangular hollow section supplier, we map each enquiry to the correct combination of section size, wall thickness, and grade based on the structural drawings provided — not by guessing from a catalogue. Our sharp-corner rectangular tube technology, covered under 41 patents, delivers tighter corner radii that improve connection plate fit-up and reduce weld preparation time on site.
Engineering Compliance Across Competing Standard Frameworks
Structural engineers designing to Eurocode 3 (EN 1993) reference EN 10219 for cold-formed welded hollow sections, while AISC-based designs in North America point to ASTM A500 as the governing specification [NEED_CITE: EN 10219 and ASTM A500 structural design code compliance]. The same physical tube can satisfy both if the mill test certificate documents chemical composition and mechanical properties against each standard’s requirements — but this dual certification must be arranged before rolling, not requested after shipment arrives. For projects in Australia and New Zealand, AS/NZS 1163 adds its own set of tolerance and marking requirements that differ from both EN and ASTM systems. Surface treatment selection also interacts with compliance: hot-dip galvanized RHS for outdoor scaffolding in coastal environments must meet zinc coating thickness standards separate from the structural grade itself.
How Steel Grade Selection Drives Load-Bearing Capacity
The S-series grades (S235, S275, S355) under EN 10219 represent incrementally higher minimum yield strength levels, meaning S355 sections carry greater loads at the same cross-section dimensions compared to S235 — allowing designers to reduce wall thickness and save weight. ASTM A500 organizes similarly through Gr.B, Gr.C, and Gr.D, with each step up delivering higher yield and tensile values. The Chinese Q-series (Q235B, Q345B) parallels this progression. ERW welded tubes dominate the structural hollow section market for sizes below 400mm due to cost efficiency and consistent weld seam quality, while seamless options serve higher-pressure or critical-load applications where weld integrity cannot be assumed. Wall thickness tolerance of ±1% ensures that theoretical weight calculations match actual delivered weight, preventing disputes over short shipments — a frequent complaint when negative tolerance practices go unchecked [NEED_CITE: negative tolerance impact on structural hollow section weight verification].
Hidden Costs When Grade Documentation Does Not Match Drawings
Accepting a shipment without verifying that the mill test certificate heat numbers align with the purchase order grade creates downstream liabilities that dwarf any upfront price savings. Structural inspectors rejecting welded connections because the delivered grade lacks the required impact toughness at service temperature forces costly rework — cutting out installed members, replacing them, and re-welding. Customs authorities holding containers for weeks due to missing CE marking on EN 10219 products bound for European ports generates demurrage charges that erase the margin difference between suppliers [NEED_CITE: CE marking requirements for EN 10219 structural hollow sections in EU construction]. Substituting a lower grade without engineering approval voids structural warranties and exposes the contractor to liability if the building fails to pass occupancy inspection.
Procurement Confidence Built on Verified Capability
Every ASTM A500 EN 10219 square and rectangular hollow section supplier claims certification — we back ours with original mill test certificates traceable by heat number from slab to finished tube. Our in-house metallurgical laboratory tests chemical composition and mechanical properties before release, meaning the MTC you receive reflects actual production data rather than mill-generic templates. With 2,800+ specifications held in ready stock across SHS, RHS, and HSS profiles, we consolidate orders that would otherwise require three or four separate suppliers — reducing freight cost and eliminating grade mixing risk. Custom cutting-to-size service with dimensional inspection reports removes the need for secondary processing at your fabrication yard. ISO 9001:2015 quality management, Lloyd’s CE certification for EN 10219/EN 10210 products, and SGS/BV third-party inspection availability before shipment provide the documentation chain that engineering consultants and customs brokers require. Professional heavy cargo loading using flatbed trailers and open-top containers prevents the damage and overweight penalties that plague improperly packed tube shipments.
Documentation & Compliance
- Mill test certificate documenting Gr.B chemical composition and mechanical properties per ASTM A500, with heat number traceability to original slab
- CE certificate confirming EN 10219 and EN 10210 compliance for S235/S275/S355 structural hollow sections destined for European markets
- ISO 9001:2015 quality management system certificate covering the full production and inspection process
- SGS or BV third-party inspection report verifying dimensional accuracy, surface treatment thickness, and weld integrity before container sealing
- Material traceability sheet linking each bundle’s heat number to corresponding test results and production batch
- Complete customs documentation package including packing list, bill of lading, and certificate of origin formatted for destination port requirements
Packaging, Loading & Delivery
- ERW welded SHS and RHS bundled with galvanized steel strips at maximum 1.5m intervals, with edge protectors preventing coating damage on galvanized surfaces during ocean transit
- Black painted tubes wrapped in waterproof kraft paper at both ends to prevent moisture ingress and white rust formation on bare steel surfaces during humid climate storage
- 6m and 12m standard lengths loaded into open-top containers using overhead cranes with nylon slings, avoiding the surface scratches caused by chain contact
- Custom cut-to-length tubes from 5.8m random lengths packaged separately by size with clear heat number stencilling on each piece for site identification
- Container weight distribution calculated per bundle to stay within port overweight limits, with flatbed truck delivery available for project sites requiring direct-to-yard logistics
- FOB, CIF, and DDP shipping terms supported with full export documentation and real-time tracking until port arrival
Securing Your Quote with Complete Technical Specifications
Submit your structural drawings or specification sheet listing section dimensions, wall thickness, steel grade, surface treatment preference, and total tonnage — we return a detailed quotation within 12 hours including material cost, any cutting fees, and shipping terms to your destination port. For non-standard sizes outside the 19×19mm to 800×800mm range, we confirm mill rolling schedules and lead times before you commit. Request sample mill test certificates for your specified grade and standard to verify documentation format meets your engineer’s approval before placing the order.
Frequently Asked Questions
Q: How do I convert between ASTM A500 Gr.B and EN 10219 S355 when my drawings mix standards?
A: We provide a grade equivalence mapping sheet showing chemical composition and mechanical property overlaps between ASTM A500, EN 10219, AS/NZS 1163, and GB/T 6728 systems. The mapping identifies which grades are directly interchangeable and which require engineering approval for substitution.
Q: Can I verify the mill test certificate before shipment leaves China?
A: Yes. We send scanned copies of original MTC documents showing heat number, chemical composition, and mechanical test results for your review before container loading. SGS or BV third-party inspection can also be arranged at our facility for independent verification.
Q: What is the minimum order quantity for custom cut-to-size tubes?
A: The standard MOQ is 5 tons. For custom cutting-to-size service, we work from your dimension list and bundle pieces by section size and length for easy site identification.
Q: Do you supply galvanized and black painted tubes in the same shipment?
A: Yes. We consolidate mixed surface treatment orders into shared containers, packaging galvanized tubes separately with edge protectors and black painted tubes with end caps to prevent cross-contamination and moisture damage.
Q: How do you handle negative tolerance on wall thickness?
A: Our ASTM A500 EN 10219 square and rectangular hollow section products maintain ±1% tolerance as standard. We provide actual measured thickness data in the dimensional inspection report so you can verify compliance against your project specification before acceptance.
Get Your ASTM A500 EN 10219 Structural Tube Quote
Send your section specifications, steel grade requirements, and destination port to receive a detailed quotation with mill test certificate samples within 12 hours.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.xjyplate.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@xjyplate.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
