Description
Factory-direct pricing, no trading markup — vertically integrated mill output feeds our fabrication line, keeping AS 1163 C350 square hollow section costs transparent from slab to finished tube.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | AS 1163 C350 Square Hollow Section |
| Product Type | Square Hollow Section (SHS) |
| Steel Grade | Q195, Q235, Q345, S235JR, S275JR, S355JR |
| Standard | AS 1163, ASTM |
| Section Shape | Square |
| Size Range | 65 × 65 mm |
| Wall Thickness | 2.5 mm |
| Technique | ERW (Electric Resistance Welded) |
| Surface Treatment | Hot Rolled |
| Tolerance | ±1% |
| Ends | Plain |
| Surface Condition | Non-oiled |
| Application | Steel structures, construction frames, machinery, scaffolding, fluid/gas/oil pipe, chemical fertilizer pipe, boiler pipe, hydraulic pipe, drill pipe, structure pipe |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Commercial Construction | Building frames, column-to-beam connections, mezzanine supports |
| Industrial Facilities | Machinery bases, conveyor support structures, platform framing |
| Scaffolding & Access | Scaffold tower uprights, cross-bracing members, temporary works frames |
| Infrastructure | Bridge handrail posts, signage gantry columns, utility support frames |
| Oil & Gas / Chemical | Low-pressure fluid transport lines, structural pipe racks |
Where ±1% Wall Tolerance Decides Site Fit-Up on a Structural Frame Order
Tight dimensional control on 65×65×2.5mm SHS prevents cumulative stack-up errors at moment connections.
When overseas buyers source structural hollow sections from China, fragmented procurement between a mill and a separate fabricator creates traceability gaps — the MTC arriving with the tubes may not match the heat number stamped on the flange. Inconsistent ERW seam quality and wall thickness drifting beyond tolerance force site crews to re-drill or ream connection plates, adding days to critical-path steel erection. An AS 1163 C350 square hollow section supplier operating under a single quality system from raw coil to finished bundle eliminates that gap. [NEED_CITE: AS 1163 structural hollow section dimensional tolerance requirements]
Matching 65×65 SHS to Medium-Duty Structural Connections
The 65×65mm side length with 2.5mm wall sits in the medium-duty range — adequate for secondary framing, bracing members, and non-primary portal legs where full S355 heavy-wall sections would be over-specified. ERW production delivers consistent internal corner geometry, allowing gusset plates and through-bolt connections to seat flush without local grinding. The hot rolled, non-oiled surface accepts shop primer, galvanizing, or intumescent coating directly after shot blasting, with no degreasing delay. As an AS 1163 C350 square hollow section supplier, we hold stock in Q235 and S355JR for projects requiring either domestic or international grade compliance from one shipment.
Engineering Compliance Across AS, EN, and ASTM Frameworks
Structural designers specifying AS 1163 C350 often need equivalence documentation when the project is located in Europe or the Middle East, where EN 10210 or EN 10219 governs hollow section acceptance. The C350 grade maps broadly to S355JR in yield class, though chemical composition limits and impact testing temperatures differ — project engineers must confirm acceptance with the certifying authority before shipment. For North American tenders, ASTM A500 Grade C equivalence requires separate verification. Third-party inspection by SGS, BV, or TUV can be witnessed at our mill to satisfy both origin-country customs and destination-country structural codes. [NEED_CITE: steel grade equivalence mapping between AS 1163 and EN 10210]
ERW Seam Integrity and Hot Rolled Surface Behavior
ERW welding forms the 65×65 SHS by cold-forming flat strip and fusing the seam through electrical resistance — the process produces a consistent weld zone suitable for structural duty up to moderate dynamic loading, without the cost premium of seamless production. The hot rolled surface retains a mill scale layer that provides short-term corrosion resistance during storage and transit; for long-term exposure, the non-oiled finish allows coating adhesion without chemical pre-treatment. Wall thickness at ±1% tolerance means the 2.5mm nominal wall will measure between 2.475mm and 2.525mm — tight enough to satisfy most structural connection detailing without requiring field reaming. [NEED_CITE: ERW versus seamless hollow section structural performance comparison]
The Hidden Cost of Accepting Out-of-Tolerance SHS on Site
A container of 65×65 SHS arriving with wall thickness below the declared 2.5mm nominal — say, averaging 2.1mm — triggers immediate rejection by any competent third-party inspector. The entire lot becomes non-conforming material: replacement shipping costs, project delay penalties, and structural recalculation by the engineer of record all follow. Certification gaps compound the problem — without a valid MTC tied to the heat number on each bundle, customs authorities in the EU or Middle East can hold the shipment indefinitely. Sourcing from an AS 1163 C350 square hollow section supplier with integrated mill testing and CE documentation removes these risks before the container is sealed. [NEED_CITE: structural steel non-conformance cost impact on project schedules]
Why Project Teams Source This SHS Through Our Mill
Our fabrication division operates directly from our own steel production facility, meaning the AS 1163 C350 square hollow section you order is rolled, welded, and inspected under one quality system — no intermediate trader inserting a second MTC or substituting off-grade coil. We maintain over 2,800 specifications in stock, so 65×65×2.5mm SHS in S355JR or Q345 can ship from existing inventory rather than waiting for a rolling campaign. Every bundle carries a heat number traceable to the original slab chemistry, and our ISO 9001-certified documentation package includes WPS, PQR, and dimensional inspection reports alongside the MTC. For European projects, CE marking to EN 10210 is available; for Australian tenders, AS 1163 compliance is documented in the standard format. Third-party inspection witnesses are accommodated at no scheduling premium.
Documentation & Compliance
- Mill Test Certificate documenting Q235 or S355JR chemical composition and mechanical properties per AS 1163, with heat number cross-referenced to each bundle
- CE certificate to EN 10210-1 for projects requiring European structural hollow section compliance, issued against factory production control audits
- ISO 9001 quality management certificate covering the full scope from raw material procurement through ERW welding and final dimensional inspection
- SGS or BV third-party inspection report verifying wall thickness, outer dimension, and surface condition against AS 1163 tolerance requirements
- Material traceability sheet linking each bundle identification to the originating heat number, slab chemistry, and rolling record
- Export documentation package including packing list, bill of lading, and certificate of origin formatted for destination-country customs clearance
Packaging, Loading & Delivery
- 65×65×2.5mm SHS bundled with high-tensile steel strips at intervals matched to the 6m or 12m random length, preventing bundle spread during crane handling
- Hot rolled non-oiled surface protected by waterproof wrapping at bundle ends to prevent edge corrosion during ocean transit
- Container loading optimized for 65×65mm square profile geometry, maximizing payload per 20ft or 40ft unit without exceeding road weight limits at destination
- Plain ends deburred and capped where specified, preventing internal debris accumulation during storage at the project site
- Bundle identification tags displaying steel grade, heat number, size, and length in both English and destination-country language
- FOB, CIF, and DDP shipping terms available with professional oversized cargo handling for mixed-dimension SHS/RHS shipments
Starting Your AS 1163 C350 SHS Procurement
Submit your project drawings or bill of materials specifying 65×65×2.5mm SHS, required steel grade, applicable standard, and destination port — we respond within 24 hours with a detailed quotation including material cost, fabrication options, coating specification, and shipping terms. For non-standard lengths or custom cut-to-size requirements, our engineering team reviews shop drawing compatibility and confirms lead time against current mill scheduling.
Request Your AS 1163 C350 SHS Quotation and MTC Package
Send your specification sheet and quantity requirement to receive pricing, mill test certificate samples, and third-party inspection options.
Company: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.xjystructure.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@xjystructure.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
Frequently Asked Questions
Q: How does AS 1163 C350 compare to EN 10210 S355JR and ASTM A500 Grade C?
A: AS 1163 C350 is an Australian standard grade for structural hollow sections with yield strength classification similar to S355JR under EN 10210 and ASTM A500 Grade C under the US standard. Chemical composition limits and Charpy impact testing requirements differ between the three standards, so project engineers must confirm acceptance with the certifying authority for the destination country. We supply 65×65×2.5mm SHS in Q345 and S355JR grades that broadly meet C350 yield requirements, with full MTC documentation for equivalence verification.
Q: What documentation accompanies an AS 1163 C350 square hollow section shipment?
A: Each shipment includes a Mill Test Certificate documenting chemical composition and mechanical properties per the ordered standard, with heat number traceability linked to each bundle. For European projects, CE certification to EN 10210 is available. Third-party inspection reports from SGS, BV, or TUV can be arranged to verify dimensional accuracy and surface condition before loading. Export documentation including packing list, bill of lading, and certificate of origin is provided as standard.
Q: Can 65×65×2.5mm SHS be supplied in custom cut-to-length sizes?
A: Yes. Standard random lengths are 6m or 12m, but we offer cut-to-length processing for specific project requirements. The MOQ for custom lengths remains 1 Ton. Lead time depends on current mill scheduling and the complexity of the cutting specification. Our engineering team reviews shop drawings to confirm dimensional compatibility before production.
Q: What surface treatment options are available for hot rolled 65×65 SHS?
A: The standard supply condition is hot rolled with non-oiled surface, suitable for direct application of shop primer, galvanizing, or intumescent coating after shot blasting. Galvanized finish is available for projects requiring enhanced corrosion resistance without site painting. The choice depends on the exposure environment and the project specification — we advise on the most cost-effective option based on your application.
Q: How are 65×65×2.5mm SHS packed for international shipping?
A: Bundles are secured with high-tensile steel strips at intervals matched to the length, with waterproof end caps preventing edge corrosion during ocean transit. Container loading is optimized for the 65×65mm square profile to maximize payload. FOB, CIF, and DDP terms are available, with professional handling for mixed-dimension shipments including oversized cargo where required.
