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JIS G3466 SS400 HSS Square Steel Tubes
JIS G3466 SS400 HSS Square Steel Tubes
JIS G3466 SS400 square and rectangular hollow‑structural‑section (HSS) tubes are premium hollow profiles widely used in heavy‑duty construction, metal fabrication and general‑purpose industrial projects. Produced with SS400 grade structural steel, our hollow sections deliver dependable mechanical strength, tight dimensional accuracy, excellent weld‑through capability and great workability for further processing.
At Royal Steel Group, we provide export‑standard square & rectangular HSS, alongside custom‑made profiles fabricated to your drawings, individual project requirements and global technical standards.
| Item | Specification |
| Product Name | HSS Square & Rectangular Tube |
| Standard | JIS G3466 |
| Steel Grade | SS400 |
| Section Type | Square / Rectangular Hollow Section |
| Common Sizes | 50×50, 80×80, 100×100, 150×150 mm |
| Manufacturing | Hot Rolled / Cold Formed, subject to size and specification |
| Surface | Black, mill finish, galvanized or customized |
| Length | Standard / Customized |
| Inspection | Dimensional, mechanical and visual inspection |
| Third-Party Inspection | BV / SGS available |
SS400 is one of Japan’s most popular structural steel grades, well‑known for solid weldability, easy machining and dependable overall structural properties. It works perfectly for all kinds of building frameworks, support frameworks and custom‑fabricated steel parts.
If your project calls for specifications under other global standards, Royal Steel Group can also supply tailor‑made hollow structural sections complying with ASTM, EN, AS/NZS and JIS technical requirements.
We stock our JIS G3466 SS400 hollow structural section tubes in many widely‑used export sizes, with popular square options listed below:
50×50 mm
80×80 mm
100×100 mm
150×150 mm
Beyond these standard sizes, wall thickness, finished length, corner radius, surface finish and all other technical parameters can be tailor‑made to match your project drawings and purchasing requirements.
Custom sizes and wall thicknesses are available according to project requirements.
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Available Surface Treatments
Black Bare Steel
Features a standard smooth mill finish with no extra coating. This bare steel finish fits most conventional structural applications and allows easy secondary processing such as cutting, welding and re-coating.
Anti-Rust Oiled Finish
A uniform anti-rust oil layer is applied on the pipe surface, which effectively prevents oxidation and rust formation during long-term storage and cross-border transportation, keeping the pipe surface intact before delivery.
Red Oxide Primer Coating
Serves as a reliable basic protective layer against corrosion. The red oxide primer finish also delivers excellent adhesion, making it an ideal base for subsequent topcoat painting and advanced coating systems.
Hot-Dip Galvanized Coating
The hot-dip galvanized layer forms a tight zinc protective film on the steel surface. It provides superior anti-corrosion performance and significantly prolongs the service life of steel pipes, making it the preferred option for outdoor structures and harsh environmental conditions.
Epoxy Coating
Epoxy coating features strong surface adhesion and outstanding chemical resistance. It provides robust barrier protection against rust, oxidation and chemical erosion, greatly improving the structural reliability of steel pipes in complex working conditions.
Customized Protective Coatings
Custom coating services are available to meet personalized project specifications. We can adjust coating thickness, surface colors and protective formulas according to actual application environments, ensuring tailored protection for different engineering requirements.
1. Industrial Building Columns
HSS square and rectangular steel tubes feature outstanding load-bearing capacity and streamlined structural design with stable mechanical performance. They are widely adopted for steel workshop columns, main factory frameworks, warehouse structural frames and other industrial building structures, fully meeting the requirements of high-strength load bearing and long-term stable operation of industrial constructions.
2. Curtain Wall Structural Works
Featuring uniform cross-section specifications and high dimensional accuracy, these steel tubes deliver neat forming effects. They serve as premium materials for building curtain wall frames, exterior wall support systems and various architectural decorative steel structures, ensuring the stability and aesthetic appearance of building facades and suiting the construction of diverse modern building curtain walls.
3. Advertising Sign Support Structures
Thanks to reliable structural strength and strong adaptability, square and rectangular steel tubes are extensively used for outdoor billboard frames, custom advertising structures, sign base supports and various outdoor steel frameworks. Boasting excellent durability, they can adapt to complex outdoor operating environments.
4. Warehouse Racking Systems
With superior structural properties, HSS profiles can be fabricated into warehouse storage racks, systematic storage solutions, equipment support bases and material handling steel structures. They offer stable load-bearing performance and wide applicability, ideal for storage and equipment matching scenarios in various warehouses and factories.
5. Custom Fabricated Components
We provide one-stop custom processing services including cutting, drilling, welding and integral forming in strict accordance with customers’ construction drawings. A full range of non-standard steel structural components can be customized to precisely satisfy the personalized construction and material demands of various engineering projects.
Royal Steel Group delivers tailor‑made structural hollow section steel profiles compliant with a wide range of international standards. Our available specifications cover:
JIS: JIS G3466
ASTM: ASTM A500 and other relevant standards
EN: EN 10210 / EN 10219
AS/NZS: Australian & New‑Zealand standards for structural hollow sections
We offer flexible custom production to match your exact requirements, including customized outer dimensions, wall thickness, steel grades, cut‑to‑length sizes, surface finishes and full‑drawing‑based fabrication.
Consistent product quality sits at the core of our whole export supply workflow. Every production batch goes through a full‑scope quality check, with inspection items listed below:
Chemical composition
Mechanical performance
Outer dimensions
Wall thickness
Length tolerances
Straightness
Surface finish
Weld quality (for welded products)
Visual examination
Packaging & marking inspection
Upon your request, we are also able to schedule third‑party audits carried out by globally‑accredited inspection bodies such as BV, SGS and other recognized testing agencies.
Global Standard Compliance
We deliver HSS hollow structural sections that conform to major international standards, including JIS, ASTM, EN and AS/NZS. This wide standard compatibility makes our products fully qualified for diverse global engineering and construction projects.
High-precision Manufacturing
We implement rigorous production control over critical technical indicators such as overall dimensions, wall thickness, straightness and surface finish. Precise manufacturing tolerance control guarantees seamless on-site fabrication and hassle-free installation for end users.
Full-range Quality Inspection
Every batch of products undergoes systematic quality verification prior to delivery. Our pre-shipment inspection covers material composition, dimensional accuracy, mechanical performance and surface appearance, ensuring stable and reliable product quality.
Highly Flexible Customization
To accommodate diversified project demands, we offer comprehensive custom services. We can tailor product sizes, cutting lengths, steel grades and deep processing solutions strictly based on client technical drawings and actual engineering needs.
Reliable Export Delivery
Backed by rich international trade experience and mature supply chain management, we maintain stable and efficient logistics arrangements. We strictly follow delivery schedules to support the smooth progress of overseas construction projects.
Authorized Third-party Verification
To build further trust for global clients, we support third-party quality audits before shipment. Inspections can be conducted by internationally authoritative institutions including SGS and BV as required by customers.
Professional Engineering Support
Our dedicated overseas service team provides one-stop project support throughout the whole procurement process. We assist with project communication, order coordination, technical document provision and full-cycle after-sales services to resolve clients’ concerns efficiently.
All HSS square and rectangular steel tubes are firmly bundled to withstand long‑haul international transit. We adjust packaging solutions to match your shipping route, transport mode and final‑destination conditions.
Our flexible shipping and packaging options cover:
Full‑container loads
Bulk vessel shipment
Custom‑tailored export packaging
Secured bundled steel tube packing
Protective wrapping plus pipe‑end safeguards
Upon contract terms, we supply the full set of required export documentation, including Mill Test Certificates (MTC), packing lists, commercial invoices, Certificates of Origin and third‑party inspection reports.
JIS G3466 SS400 HSS square and rectangular tubes are an excellent choice for steel structure contractors, fabrication companies, warehouse builders, façade contractors, sign manufacturers, and engineering procurement companies.
With flexible production, strict quality control, international standard compatibility, and professional export support, Royal Steel Group can provide HSS solutions precisely matched to project requirements.
Q1: What are your best‑selling sizes for JIS G3466 SS400 hollow structural sections?
A: Our most frequently exported square HSS sizes cover 50×50 mm, 80×80 mm, 100×100 mm and 150×150 mm. Beside these standard dimensions, we also accept orders for non‑standard custom sizes.
Q2: Are you able to produce HSS tubes based on customer‑supplied technical drawings?
A: Absolutely. We can tailor dimensions, wall thickness, finished length, steel grade and extra processing work strictly following your project drawings.
Q3: Do you offer HSS sections manufactured to ASTM or EN specifications?
A: Sure. Beyond our JIS‑compliant product line, we also fabricate hollow structural sections that meet ASTM, EN, as well as AS/NZS international standards.
Q4: Is third‑party quality inspection an available option before shipment?
A: Yes. We can schedule inspections carried out by BV, SGS or other internationally recognized testing agencies as you request.
Q5: What typical projects use SS400 HSS steel tubes?
A: SS400 hollow sections work well across many structural applications, such as industrial workshop columns, warehouse frameworks, building curtain wall systems, outdoor sign supports, warehouse racking and custom‑fabricated steel parts.
Q6: Do you provide secondary fabrication services for HSS products?
A: We offer full fabrication support for your projects. Services including cutting, drilling, welding and other custom machining can be completed per your drawings and technical specifications.
Looking for JIS G3466 SS400 HSS square or rectangular tubes for your next project?
Send us your required size, wall thickness, length, quantity, steel grade, standard, and destination port. Royal Steel Group will provide a competitive quotation and suitable export solution for your project.
ROYAL GROUP
Address
Kangsheng development industry zone,
Wuqing district, Tianjin city, China.
Phone
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