Description
Factory-Direct Sharp Corner SHS/RHS Supply — Hot-rolled Q195–Q460 and SS330–SS540 square and rectangular tubes shipped with original mill test certificates and ISO 9001 traceability.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Q195-Q460 / SS330-SS540 Square Steel Tube |
| Product Type | Square and Rectangular Steel Tube |
| Steel Grade | Q195, Q235, Q235B, Q345, Q345B, Q460, SS330, SS400, SS540 |
| Standard | GB/T 6728; ASTM / EN / JIS equivalents available |
| Section Shape | Square / Rectangular (Sharp Corner) |
| Size Range | 100×100 mm, 40×60 mm and full range available |
| Wall Thickness | 0.5–200 mm |
| Length | 12 m standard; custom length available |
| Technique | Hot Rolled |
| Surface Treatment | Hot Rolled (Black / Non-Oiled) |
| Tolerance | ±1% |
| Ends | Plain End |
| Application | Steel Structures, Construction Frames, Machinery, Scaffolding, Fluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe, Gas Pipe |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Infrastructure | High-rise building frames, bridge support columns, industrial platform structures |
| Machinery Fabrication | Hydraulic cylinder casings, drill pipe outer sleeves, conveyor support frames |
| Energy & Petrochemical | Boiler support tubes, gas pipeline structural brackets, pressure vessel frames |
| Scaffolding & Formwork | Scaffolding uprights, formwork support beams, temporary shoring towers |
What Wall-Thickness Tolerance Costs on a Hot Rolled Square and Rectangular Steel Tube Order
A ±1% tolerance on a 100×100×8 mm SHS means 0.08 mm deviation — enough to shift joint fit-up on a bolted frame.
Sourcing sharp corner square and rectangular tubes from fragmented suppliers often means receiving inconsistent wall thickness across bundles. One lot arrives at nominal dimension; the next runs heavy negative tolerance, pushing actual weight below theoretical and weakening load-bearing joints. On a structural frame with dozens of bolted connections, even small deviations compound — holes misalign, gusset plates don’t seat flat, and field rework eats into project margins. [NEED_CITE: structural hollow section dimensional tolerance standards EN 10219]
How Sharp Corner SHS/RHS Fits Structural Frame Engineering
Hot rolled sharp corner square and rectangular steel tubes in Q235B and Q345B grades deliver the flat bearing surfaces that bolted and welded structural frames require. Unlike rounded-corner cold-formed sections, sharp corner profiles sit flush against gusset plates and base plates without gap-filling shims — critical for load transfer in high-rise columns and bridge support nodes. Our 100×100 mm and 40×60 mm sections in wall thickness up to 200 mm cover both light bracing and heavy-load vertical members, with 12 m standard lengths reducing on-site splicing.
Engineering Compliance and Grade Selection for Structural Use
Structural frames designed under EN 1993 or AISC specifications require verified yield strength and documented chemical composition. Q345B maps closely to S355JR under EN 10219, while Q235B aligns with S235JR — but equivalence must be confirmed per order, not assumed. [NEED_CITE: steel grade equivalence between GB Q-series and EN S-series standards] Hot rolled black finish suits indoor structural use or projects where field painting or galvanizing follows fabrication; for outdoor exposure without secondary coating, galvanized or painted options should be specified upfront. Third-party inspection by SGS or BV before shipment confirms dimensional compliance and material traceability by heat number — a requirement for EU customs clearance under CE marking and for North American projects referencing ASTM A500.
Hot Rolled Process and Sharp Corner Formation
Hot rolled square and rectangular steel tubes are formed from steel strip at elevated temperature, then shaped through a continuous forming process that produces sharp external corners. This method preserves the full cross-sectional area at the corner radius — unlike cold-formed sections where corner thinning reduces effective wall thickness. The Q195–Q460 grade range covers mild structural use (Q195, SS330) through medium-strength framing (Q235B, Q345B, SS400) to high-load applications (Q460, SS540). Wall thickness from 0.5 mm to 200 mm with ±1% tolerance allows both thin-walled bracing tubes and heavy structural columns from a single Hot Rolled Square and Rectangular Steel Tube supplier.
Hidden Costs of Unverified Tolerance and Missing MTC
Ordering sharp corner SHS/RHS without original mill test certificates risks material substitution — a batch labeled Q345B may actually contain lower-grade steel with insufficient yield strength for structural loading. Negative tolerance beyond ±1% shifts invoicing weight below theoretical, but more critically, it thins load-bearing walls at joints and connections. [NEED_CITE: consequences of negative tolerance in structural hollow sections] Customs authorities in the EU and Middle East increasingly reject hollow section imports lacking CE documentation or verifiable heat number traceability, causing port delays and demurrage charges.
Why Source Hot Rolled Square and Rectangular Steel Tube from XJY Plate
We operate as a factory-direct supplier — no trading middlemen adding margins to your tonnage price. Every Hot Rolled Square and Rectangular Steel Tube ships with an original mill test certificate documenting chemical composition and mechanical properties per heat number. Our inventory covers Q195 through Q460 and SS330 through SS540 in sharp corner square and rectangular profiles, wall thickness 0.5–200 mm, with integrated cutting, bending, punching, and welding services that eliminate secondary handling at your yard. ISO 9001:2015 and CE certification support customs clearance across EU, Southeast Asian, and Middle Eastern ports. Professional heavy-cargo loading — flatbed, open-top container, and break-bulk — prevents transit damage on 12 m lengths and ensures accurate weight documentation.
Documentation & Compliance
- Mill test certificate documenting Q235B/Q345B chemical composition and mechanical properties per GB/T 6728, with heat number traceability
- CE certificate confirming compliance with EN 10219 structural hollow section requirements for EU market access
- ISO 9001:2015 quality management certificate covering production, inspection, and dispatch processes
- SGS or BV third-party inspection report available before shipment, verifying dimensional tolerance and surface quality
- Material traceability by heat number linking each bundle to its original slab and rolling schedule
- Full customs documentation set: packing list, bill of lading, certificate of origin, and commercial invoice
Packaging, Loading & Delivery
- Hot rolled black finish tubes bundled with steel strips and edge protectors to prevent surface scratching and corner damage during transit
- 12 m standard lengths loaded in open-top containers or flatbed trailers with wooden chocks to prevent shifting and maintain sharp corner integrity
- Custom cut-to-length tubes packed separately with heat number and steel grade stenciled on each bundle for site identification
- Wall thickness tolerance verified by dimensional inspection report included with each shipment, supporting actual-weight invoicing
- FOB, CIF, and DDP shipping terms available; professional heavy-cargo logistics team handles overweight container planning and port documentation
- Break-bulk shipping arranged for project volumes exceeding container capacity, with full stowage planning for sharp corner profiles
Start Your Sharp Corner SHS/RHS Procurement
Submit your specification — steel grade, section size, wall thickness, length, quantity, and destination port — to receive a detailed quotation with material cost, processing fees, and shipping terms within 12 hours. We will provide the original mill test certificate for your quality verification before shipment, and coordinate SGS/BV third-party inspection if required by your project or customs authority.
Get Your Hot Rolled Square and Rectangular Steel Tube Quote
Send your specification and destination to receive pricing, mill test certificates, and shipping terms.
Email: admin@xjyplate.com | WhatsApp: +86 188 5315 7756 | Website: www.xjyplate.com
