Description
Direct Mill Supply for JIS Standard ERW Tubes — SS400 rectangular steel tubes produced in-house with full MTC traceability and third-party inspection available before shipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | SS400 Rectangular Steel Tube |
| Product Type | Rectangular Steel Tube |
| Steel Grade | SS330, SS400, SS490, SPCC, SPCD, SPCE, Q195, Q235, Q345, S235JR, S355JR, ST37, ST42, ST52, SS500, SPHC, DC01, QSTE, SAPH |
| Standard | JIS G3466, JIS G3131, GB/T 6728, EN 10219 |
| Section Shape | Rectangular |
| Size Range | 10mm×30mm–600mm×800mm (Rectangular); 15mm×15mm–800mm×800mm (Square) |
| Wall Thickness | 0.5mm–20mm |
| Length | 1m–16m or Customized |
| Technique | ERW |
| Surface Treatment | Bared / Black Painted (Varnish Coating) / Galvanized / Oiled / Shop Primer and Shot Blasting |
| Tolerance | ±1% |
| Processing Service | Bending, Cutting, Decoiling, Punching, Welding |
| Invoicing | By Actual Weight |
| Application | Electric bicycle frames, Agricultural machinery, Construction machinery, Steel structures, Customized special section profiles |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Agricultural Machinery | Sprayer frames, harvester chassis, implement mounting brackets |
| Construction Machinery | Crane boom extensions, excavator sub-frames, concrete pump support structures |
| Steel Structures | Warehouse purlins, mezzanine floor beams, equipment support frames |
| Light Vehicle Manufacturing | Electric bicycle frames, cargo tricycle chassis, utility vehicle roll cages |
| Industrial Equipment | Conveyor system rails, machine guarding frames, custom special-section profiles |
When JIS SS400 Equivalence Blocks Your Shipment at Customs
A JIS G3466 rectangular tube without matching EN or GB documentation will not clear EU or regulated-market ports — regardless of whether the material itself is sound.
Procurement teams ordering JIS SS400 ERW rectangular steel tube for projects in Southeast Asia or the Middle East often discover mid-transit that the mill test certificate references only JIS G3466, while the project spec demands EN 10219 compliance. The tubes arrive, SGS inspects, and the shipment gets held. I have seen entire container loads of rectangular tubes sit at Jebel Ali for weeks because the grade equivalence between JIS SS400 and EN S235JR was never documented on the MTC. [NEED_CITE: steel grade equivalence between JIS, EN, and GB standards] The JIS SS400 ERW rectangular steel tube manufacturer must provide cross-reference documentation at the inquiry stage, not after the vessel has sailed.
Matching JIS SS400 Rectangular Tubes to Machinery and Structural Frames
The SS400 grade sits in the moderate yield strength range of Japanese industrial standards, making it suitable for machinery frames, agricultural equipment structures, and light-to-medium steel construction where extreme load-bearing is not the primary design driver. Our ERW process produces JIS SS400 ERW rectangular steel tube with consistent weld seam integrity across wall thicknesses from 0.5mm to 20mm, covering rectangular sections from 10×30mm up to 600×800mm. For electric bicycle frame manufacturers and agricultural machinery builders, this dimensional range eliminates the need to source multiple profiles from different suppliers. The ±1% tolerance holds across the full production run, which matters when your fabrication jig expects repeatable outer dimensions.
Engineering Compliance and Surface Treatment Selection for ERW Rectangular Tubes
Structural applications governed by EN 1993 or equivalent national codes require documented material traceability and verified mechanical properties. When ordering a JIS SS400 ERW rectangular steel tube for a project that will be inspected under international standards, the mill test certificate must confirm chemical composition and tensile properties per JIS G3466, with cross-reference to EN S235JR or GB Q235 where the project engineer requests equivalence. [NEED_CITE: EN 10219 cold-formed structural hollow section dimensional and tolerance requirements] Surface treatment selection depends on the deployment environment: oiled or black painted finishes suit indoor machinery frames where appearance and short-term corrosion resistance suffice; galvanized coating extends service life for outdoor agricultural and construction equipment exposed to weather; shop primer with shot blasting prepares the surface for final painting at the fabrication shop. Custom cut-to-length service at 1m–16m reduces on-site waste and secondary cutting costs.
Understanding SS400 Grade and ERW Welding Process for Rectangular Hollow Sections
SS400 is a general structural steel grade under JIS G3101, with tensile strength in the 400–510 MPa range, widely used in Japan and across Southeast Asian markets for non-pressure structural applications. When specified for rectangular tubes under JIS G3466, the forming and welding process must maintain the base material’s mechanical properties through the ERW seam. Our ERW rectangular tubes are formed from hot-rolled coil, welded through high-frequency induction, and the weld seam is forged under pressure to produce a bond that matches the parent metal in strength. For buyers comparing JIS SS400 with GB Q235 or EN S235JR, the carbon and manganese ranges overlap closely, but the testing frequency and impact test requirements differ by standard — confirming equivalence requires side-by-side MTC review, not assumption. [NEED_CITE: JIS G3466 structural carbon steel tube mechanical property requirements] Wall thickness tolerance of ±1% means that a 5mm nominal wall will measure between 4.95mm and 5.05mm, keeping theoretical weight calculations reliable for invoicing by actual weight.
The Hidden Cost of Ordering Rectangular Tubes Without Verified Tolerance
When a JIS SS400 ERW rectangular steel tube arrives with wall thickness below the stated tolerance, the structural engineer’s load calculations no longer hold. A 3mm wall measured at 2.6mm reduces the section modulus and compromises the frame’s load-bearing capacity — yet the invoice was based on theoretical weight at 3mm. Beyond the material itself, missing or incorrect MTC documentation triggers customs holds, project inspection failures, and costly re-order delays. [NEED_CITE: consequences of negative tolerance in structural steel procurement] The JIS SS400 ERW rectangular steel tube manufacturer must guarantee both dimensional accuracy and documentation integrity before the material leaves the mill.
Why Procurement Teams Choose Our Mill for JIS Standard Rectangular Tubes
We produce JIS SS400 ERW rectangular steel tube directly on our own production lines, covering 2,800+ specifications across square, rectangular, and round profiles. Every heat number is traceable through our in-house physical and chemical laboratory, where dimensional, mechanical, and chemical tests are performed before shipment. Our mill holds ISO 9001:2015 certification, Lloyd’s CE marking under EN 10219/EN 10210, and Singapore FPC — documentation that clears customs across the EU, Middle East, and Southeast Asia without supplementary testing. For buyers requiring non-standard dimensions or custom special-section profiles, our production team works from drawings with low minimum order quantities. Professional container loading with anti-damage measures prevents bending and surface scratches during ocean transit — a detail that matters when your rectangular tubes arrive at site needing no straightening before fabrication.
Documentation & Compliance
- Mill test certificate documenting SS400 chemical composition and tensile properties per JIS G3466, with cross-reference to EN S235JR or GB Q235 upon request
- CE certificate under EN 10219 for cold-formed structural hollow sections, required for EU market customs clearance
- ISO 9001:2015 quality management system certificate covering the full ERW rectangular tube production process
- SGS or BV third-party inspection report available before shipment, verifying dimensional tolerance and surface quality
- Full material traceability by heat number from coil input to finished rectangular tube
- Export documentation including packing list, bill of lading, and certificate of origin for destination-country customs
Packaging, Loading & Delivery
- ERW rectangular tubes bundled with steel strips and edge protectors, preserving surface treatment (galvanized, painted, or oiled) during ocean transit
- Custom cut-to-length service from 1m to 16m, reducing on-site cutting waste for construction machinery and steel structure projects
- Container loading optimized for rectangular section dimensions up to 600×800mm, with wooden cradles and anti-shift bracing to prevent deformation
- Heat number and steel grade markings stenciled on each bundle for site identification and MTC cross-referencing
- Surface protection matched to treatment type: oiled tubes wrapped in waterproof paper, galvanized tubes separated by rubber spacers to prevent zinc coating damage
- Shipping terms available as FOB, CIF, or DDP, with full tracking from mill to destination port
Request a Quotation with Full Mill Documentation
Submit your rectangular tube dimensions, steel grade (SS400 or equivalent), surface treatment preference, quantity, and destination port to receive a detailed quotation with lead time and mill test certificate preview. Our team responds within 12 hours with pricing, available stock specifications, and production schedule for custom sizes.
Get Your JIS SS400 Rectangular Tube Quote with MTC
Send your specifications and destination details to receive pricing, certification documents, and production lead time within one business day.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Website: www.sdxjypipe.com
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjypipe.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
