Description
Factory-Direct Pricing, No Broker Markup — Q195–Q460 hot rolled square steel tubes priced at source with full mill test traceability per batch.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Q195-Q460 Hot Rolled Square Steel Tube |
| Product Type | Square Steel Tube (SHS) |
| Steel Grade | Q195, Q235, Q235B, Q345, Q345B, Q460, SS330, SS400, SS540 |
| Standard | ISO 9001 certified; other standards available upon request |
| Section Shape | Square |
| Size Range | 100×100 mm (40×60 mm rectangular variant available) |
| Wall Thickness | 0.5–200 mm |
| Length | 12 m (custom cutting available) |
| Technique | Hot Rolled |
| Surface Treatment | Hot Rolled (Non-Oiled) |
| Tolerance | ±1% |
| Ends | Plain ends; processing available |
| Application | Fluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe, Gas Pipe, Steel Structures, Construction Frames, Machinery, Scaffolding |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Industrial pipe racks, plant support frames, conveyor gantries |
| Construction Companies | High-rise building columns, scaffolding uprights, foundation piles |
| Machinery Manufacturers | Hydraulic cylinder housings, fluid conveyance manifolds, drill rod sleeves |
| Infrastructure Developers | Bridge cross-beams, sound barrier posts, solar panel mounting structures |
What Wall-Thickness Tolerance Costs on a Heavy-Duty Frame Order
A ±1% tolerance on 200mm wall hot rolled square steel tubes means the difference between a column that passes load calculation and one that fails third-party inspection.
When structural engineers specify Q460 grade at 200mm wall for industrial frames, even minor deviation compounds across dozens of connection nodes. A Hot Rolled Square Steel Tube Supplier who cannot guarantee tolerance consistency forces your site team to re-machine every piece or risk rejection during final acceptance. Material traceability gaps make it worse — without heat-number linkage on the mill test certificate, customs officers in strict markets hold the entire container pending chemical re-testing. [NEED_CITE: EN 10219 dimensional tolerance requirements for hot formed hollow sections]
Matching Structural Load Paths in Industrial Construction
Hot rolled square steel tubes in Q345B and Q460 grades carry primary vertical and lateral loads in plant structures where welded connections demand flat, predictable bearing surfaces. The non-oiled hot rolled surface accepts site-applied primer or galvanizing without adhesion failure, while the ±1% tolerance ensures end-plate connections seat flush without shimming. For EPC projects spanning multiple disciplines, sourcing the full range from one Hot Rolled Square Steel Tube Supplier eliminates coordination gaps between structural, piping, and mechanical packages.
Engineering Compliance and Certification Pathways
Load-bearing hot rolled square tubes for EU-bound projects must conform to EN 10210 hot-finished hollow section requirements, which govern chemical composition limits, impact testing temperatures, and dimensional tolerances. North American specs typically reference ASTM A500 Grade B or C, while Japanese and Australian projects follow JIS G3466 and AS1163 respectively. A Hot Rolled Square Steel Tube Supplier with in-house physical and chemical laboratories issues mill test certificates per heat number, avoiding the customs delays that arise when certificates are back-dated or missing. [NEED_CITE: steel grade equivalence mapping between Q-series, EN, and ASTM standards]
Decoding Hot Rolled Grades and Surface Conditions
The Q-series (Q195 through Q460) follows the Chinese GB/T standard where the number denotes minimum yield strength in MPa — Q460 delivers roughly double the yield of Q195, making it suitable for heavily loaded columns rather than light scaffolding. SS330–SS540 follows the Japanese JIS system with similar yield progression. Hot rolled non-oiled surface means the mill scale remains intact at delivery; this provides short-term rust protection during transit but requires blast cleaning before painting or galvanizing for long-term corrosion resistance. Wall thickness up to 200mm places these tubes in the heavy structural category, where negative tolerance directly affects theoretical weight invoicing — buyers should confirm whether settlement is by actual weigh-bridge or theoretical calculation before contract signing.
Hidden Costs of Sourcing the Wrong Grade or Paperwork
Specifying Q235B when the structural drawing calls for Q460 means the member yields under design load — no amount of re-welding fixes a fundamental material shortfall. Missing CE EN 10210/10219 certification on an EU-bound shipment triggers port holds that cost more in demurrage than the tubes themselves. Unverified negative tolerance beyond ±1% means you paid for 200mm wall but received 190mm — the load capacity drops, the inspector flags it, and the project timeline collapses. [NEED_CITE: consequences of dimensional non-compliance in structural steel acceptance]
Procurement Confidence from Source to Site
Every Hot Rolled Square Steel Tube order ships with a mill test certificate generated by our in-house laboratory, covering chemical composition and mechanical properties per heat number. Third-party inspection by SGS or BV is available before container sealing, providing independent verification for projects requiring dual certification. With 2,800+ specifications across square, rectangular, round, and section steel, a single purchase order covers your structural frames, pipe racks, and machinery supports — eliminating the coordination risk of splitting orders across multiple Hot Rolled Square Steel Tube Supplier sources. Our proprietary sharp-corner rectangular tube technology, backed by 41 patents, fills gaps that standard catalogues cannot address. Professional loading plans with custom bracing protect the sharp edges and tight tolerances during ocean transit, while door-to-door logistics handle FOB, CIF, or DDP terms to 50+ countries.
Documentation & Compliance
- Mill test certificate documenting Q195–Q460 chemical composition and mechanical properties per heat number, issued from in-house laboratory
- CE certificate per EN 10210/EN 10219 for hot finished structural hollow sections destined for EU member states
- ISO 9001:2015 quality management certificate covering the full production and inspection process
- SGS or BV third-party inspection report available upon request for projects requiring independent verification
- Material traceability sheet linking each bundle to its heat number, chemical analysis, and tensile test results
- Customs documentation package including packing list, bill of lading, and certificate of origin for import clearance
Packaging, Loading & Delivery
- Hot rolled square tubes bundled with high-tensile steel strips at four points, with edge protectors preserving the non-oiled mill scale during handling
- 12-meter standard length loaded in dedicated 20ft or 40ft containers with timber chocks and wire bracing to prevent shifting on heavy-wall Q460 orders
- Custom cutting to site-specific lengths available before shipment, reducing on-site waste and welding joints for scaffolding applications
- Each bundle tagged with heat number, steel grade (Q235B/Q345B/Q460), wall thickness, and length for immediate site identification
- Professional loading plan optimized for 0.5–200mm wall thickness range, maximizing container payload while protecting sharp corners
- FOB Jinan/Qingdao, CIF destination port, or DDP door-to-door delivery available with real-time tracking for EPC project scheduling
Initiating Your Procurement Inquiry
Submit your specification sheet — including steel grade, section size, wall thickness, quantity, and destination port — to receive a detailed quotation with unit pricing, production lead time, and applicable certification options. For non-standard dimensions outside the 100×100 mm catalog range, our engineering team provides custom feasibility assessment and MOQ confirmation. Request mill test certificate samples and third-party inspection terms before contract signing to verify compliance with your project specification.
Frequently Asked Questions
Q: Can you supply hot rolled square steel tubes in Q460 grade with EN 10210 certification for EU projects?
A: Yes. We produce Q460 hot rolled square tubes and can provide CE certification per EN 10210/EN 10219 for EU market clearance, along with mill test certificates documenting chemical and mechanical properties per heat number.
Q: What is the minimum order quantity for custom-cut lengths?
A: The standard MOQ is 5 tons. Custom cutting to your specified lengths is available within the 12-meter standard, subject to order volume confirmation.
Q: How do you handle negative tolerance and weight invoicing?
A: Our hot rolled square steel tubes maintain ±1% dimensional tolerance. Weight settlement can be arranged by actual weigh-bridge mass or theoretical calculation — confirm your preference before contract signing.
Q: Do you provide third-party inspection before shipment?
A: Yes. SGS and BV third-party inspections are available upon request. The inspection report covers dimensional checks, surface quality, and witness testing, issued before container sealing.
Q: Can you supply both square and rectangular tubes in the same order?
A: Yes. Our product range covers 2,800+ specifications including square tubes (100×100 mm), rectangular variants (40×60 mm), and other sizes. A single order can combine multiple profiles to meet full project requirements.
Get Your Hot Rolled Square Steel Tube Quotation Today
Send your specifications, steel grade requirements, and destination details to receive pricing, mill test certificate samples, and deli*n Jiyuan Special Steel Tube Co., Ltd
Email: admin@sdxjysteel.com
Mobile/WhatsApp/WeChat: +86 188 5315 7756
