Description
Factory-Direct AS 1163 C350 SHS Square Tube 65x65x2.5mm ERW Supplier — Every batch of 65×65×2.5mm SHS undergoes in-house laboratory testing for chemical composition and dimensional tolerance before container loading, with full traceability by heat number.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | AS 1163 C350 SHS/RHS Hollow Steel Section |
| Product Type | Square / Rectangular Steel Tube (SHS/RHS) |
| Steel Grade | C350, Q195, Q235, Q345, S235JR, S275JR, S355JR |
| Standard | AS 1163, ASTM |
| Section Shape | Square / Rectangular |
| Outer Diameter or Side Length | 65 × 65 mm (SHS) |
| Wall Thickness | 2.5 mm |
| Technique | ERW |
| Surface Treatment | Hot Rolled |
| Tolerance | ±1% |
| Ends | Plain |
| Oiled or Non-oiled | Non-oiled |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Application | Steel structures / Construction frames / Machinery / Scaffolding / Fluid transport / Gas pipeline / Oil pipeline / Boiler applications |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Structural steel procurement for industrial plants and infrastructure projects across Southeast Asia, Middle East, and Australia |
| Construction Companies | Building frames, scaffolding systems, and high-rise structural support columns |
| Machinery Manufacturers | Equipment frames, conveyor structures, and automation system supports |
| System Integrators | Industrial conveyor frameworks and material handling structures |
What Dimensional Tolerance Costs on a 65×65 SHS Structural Order
A 2.5mm wall specified at ±1% tolerance prevents structural miscalculation and customs rejection at destination port.
Global buyers sourcing SHS/RHS to Australian standards frequently encounter wall thickness deviations that trigger SGS rejection at discharge ports. When 2.5mm walls arrive at 2.1mm, the entire container faces hold at Jebel Ali or Sydney — not because the steel failed structurally, but because documentation cannot match physical reality. Our in-house physical and chemical laboratory tests every production batch before loading, with tolerance reports personally reviewed against AS 1163 C350 requirements. This eliminates the specification gap between mill certificates and actual product dimensions that causes project delays and rework costs. [NEED_CITE: AS 1163 cold-formed hollow section dimensional tolerance requirements]
How C350 Grade SHS Matches Australian Structural Standards
The C350 grade meets AS 1163 requirements for structural hollow sections used in building frames and machinery supports across Australia and Southeast Asia. The 65×65×2.5mm SHS dimension provides optimal strength-to-weight ratio for scaffolding systems and conveyor structures where precise dimensional accuracy affects connection fit-up. ERW welding technique ensures consistent weld seam integrity along the longitudinal seam, while hot rolled surface treatment delivers mill-scale finish suitable for immediate fabrication without additional surface preparation.
Engineering Compliance and Certification Requirements
Structural projects requiring AS 1163 C350 compliance must verify chemical composition and mechanical properties through original mill test certificates issued per heat number. The ±1% dimensional tolerance on 65×65×2.5mm SHS meets international precision requirements for structural steel procurement, ensuring that theoretical weight calculations match actual delivered quantities. CE certification under EN 10210/EN 10219 enables European market compliance when the same product specification serves dual-market projects. Third-party inspection through SGS or BV before shipment provides independent verification for customs clearance and project acceptance documentation. [NEED_CITE: EN 10219 cold-formed structural hollow section certification requirements]
Understanding C350 Grade and ERW Process Fundamentals
C350 grade designates a minimum yield strength level within the AS 1163 standard system for cold-formed structural hollow sections, positioning it between C250 and C450 grades for medium-load structural applications. The ERW (Electric Resistance Welding) process forms square tubes from hot rolled coil through continuous forming and high-frequency current welding, producing consistent weld quality suitable for structural frames and machinery supports. Hot rolled surface treatment retains mill scale that provides temporary corrosion protection during storage and transport, while non-oiled finish allows immediate welding and painting without surface cleaning. The ±1% tolerance on wall thickness ensures that 2.5mm specified walls maintain structural calculation accuracy across the full production batch.
Hidden Costs of Specification Non-Compliance
Purchasing SHS without verified mill test certificates creates downstream risks: customs authorities at destination ports reject shipments lacking proper documentation, structural engineers cannot approve materials without traceable heat numbers, and project timelines extend while replacement steel is sourced. Negative tolerance exceeding specification limits reduces actual load-bearing capacity below design calculations, creating safety concerns that surface only during structural inspection. Our factory maintains original mill test certificates documenting C350 chemical composition and mechanical properties per AS 1163, with third-party inspection available through SGS and BV for projects requiring independent verification. [NEED_CITE: structural steel certification requirements for customs clearance]
Why Source AS 1163 C350 SHS From Our Factory
As a designated supplier holding 41 invention patents including proprietary sharp-corner rectangular tube technology, we manufacture 2,800+ specifications covering square tubes, rectangular tubes, round pipes, steel plates, and section steel from three dedicated production lines. Our in-house physical and chemical laboratory conducts incoming material inspection, in-process quality control, and final dimensional verification before shipment — eliminating reliance on external testing facilities. CE certification under EN 10210/EN 10219, ISO 9001:2015 quality management, and verification through SGS and BV provide comprehensive documentation for global projects across 50+ countries including EU, North America, Australia, and Middle East markets. Professional loading plans optimize container utilization for heavy steel shipments, with door-to-door logistics coordination handling customs documentation and port clearance requirements.
Documentation & Compliance
- Mill test certificate documenting C350 chemical composition and mechanical properties per AS 1163, issued per heat number with full traceability
- CE certificate under EN 10210/EN 10219 enabling European market compliance for dual-standard projects
- ISO 9001:2015 quality management system certificate covering production processes and quality control procedures
- SGS or BV third-party inspection report verifying dimensional tolerance and surface quality before container loading
- Material traceability documentation linking each bundle to specific heat numbers and production batch records
- Customs clearance package including packing list, bill of lading, and certificate of origin for destination port requirements
Packaging, Loading & Delivery
- Hot rolled C350 SHS bundled with steel strips and edge protectors to preserve mill-scale finish during ocean transit
- Non-oiled 65×65×2.5mm square tubes packed in seaworthy bundles with moisture barriers preventing surface corrosion during container shipping
- Container loading optimization for 6-meter and 12-meter lengths maximizes payload while maintaining weight distribution for 20ft and 40ft containers
- Plain ends protected with plastic caps preventing damage during handling and transportation to construction sites
- Heat number and C350 grade stenciled on each bundle for site identification and traceability verification
- FOB, CIF, and DDP shipping terms available with professional logistics coordination for door-to-door delivery to project sites
Initiating Your AS 1163 C350 SHS Procurement
Submit your specification requirements including 65×65×2.5mm SHS dimensions, C350 grade, quantity, and destination port to receive detailed quotation with unit pricing, production lead time, and applicable certification documentation. Request non-standard sizes beyond standard catalog specifications for custom structural requirements, or confirm mill test certificate and third-party inspection availability for project compliance verification. Our international business team responds within 12 hours with complete technical documentation and logistics options tailored to your project timeline.
Frequently Asked Questions
Q: How does AS 1163 C350 compare to ASTM A500 Grade B or EN 10210 S355 for structural applications?
A: AS 1163 C350, ASTM A500 Grade B, and EN 10210 S355 represent different standard systems for structural hollow sections with varying chemical composition and mechanical property requirements. Our factory produces square and rectangular tubes meeting multiple international standards, with mill test certificates documenting compliance to your specified standard. Cross-reference documentation is available for projects requiring dual-standard compliance or material substitution approval.
Q: Can you produce custom SHS/RHS sizes beyond the 65×65×2.5mm specification?
A: Our three production lines cover 2,800+ specifications including square tubes from 20×20mm to 400×400mm with wall thickness up to 40mm, plus custom non-standard sizes for specialized structural requirements. Custom orders maintain the same ±1% dimensional tolerance and in-house laboratory verification as standard catalog products, with typical production lead times confirmed upon specification review.
Q: What quality certifications and mill test documentation are included for customs clearance?
A: Each shipment includes original mill test certificates documenting C350 chemical composition and mechanical properties per AS 1163, CE certificate under EN 10210/EN 10219 for European compliance, ISO 9001:2015 quality certificate, and complete customs documentation including packing list, bill of lading, and certificate of origin. Third-party inspection through SGS or BV is available upon request for projects requiring independent verification before shipment.
Q: What is the difference between hot rolled and galvanized surface treatment for structural applications?
A: Hot rolled surface treatment retains mill scale providing temporary corrosion protection during storage and transport, suitable for immediate fabrication and painting in controlled environments. Galvanized coating offers long-term corrosion resistance for outdoor exposure and harsh environments, with additional processing time and cost. The choice depends on your project’s environmental conditions, fabrication timeline, and maintenance requirements.
Q: How do you handle container loading optimization for heavy steel shipments?
A: Professional loading plans maximize container payload while maintaining weight distribution for 6-meter and 12-meter lengths in 20ft and 40ft containers. Our logistics team coordinates with shipping lines for equipment availability and port scheduling, with real-time tracking provided from factory loading through destination port clearance. FOB, CIF, and DDP terms available based on your procurement preferences and destination requirements.
Start Your AS 1163 C350 SHS Procurement Today
Submit your 65×65×2.5mm SHS specifications, quantity requirements, and destination port to receive detailed quotation with mill test certificate documentation and production timeline within 12 hours.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxjysteel.com
Email: admin@sdxjysteel.com
Mobile/WhatsApp/WeChat: +86 188 5315 7756
