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HSS Structural Steel Tube (Square & Rectangular Hollow Section)
High-Strength ASTM A500 HSS Steel Tube for Structural Applications
Royal Steel Group supplies high-performance HSS Structural Steel Tube that fully conform to ASTM A500 Grade B and Grade C industry standards. Boasting outstanding structural stability and load-bearing capacity, our ASTM A500 Steel Tube are extensively adopted in heavy-duty construction and commercial engineering scenarios. They serve as ideal structural materials for commercial building frames, industrial factory facilities, data center structural systems, bridge engineering and other core structural construction projects.
We support diversified product specifications and personalized customized processing services to meet differentiated project demands. Customers can customize fixed cutting lengths, professional surface treatment and finishing, as well as standard export packaging solutions. Tailored for global contractors, steel processing manufacturers, EPC engineering companies and international steel distributors, our Hollow Section Steel Tube feature stable physical properties and uniform quality. Every batch of products undergoes strict quality inspection to deliver reliable and long-lasting performance for all overseas construction projects.
| Item | Specification |
| Product Name | HSS Structural Steel Tube |
| Shape | Square & Rectangular Hollow Section |
| Standard | ASTM A500 Grade B / Grade C |
| Material | ASTM A500 Gr.B, ASTM A500 Gr.C |
| Surface | Black, Oiled, Hot-Dip Galvanized, Painted |
| Length | 6m, 9m, 12m or Customized |
| Manufacturing Process | ERW |
| Inspection | Chemical Composition, Mechanical Properties, Dimensional Inspection |
| Certification | ISO 9001, SGS, BV, Mill Test Certificate |
| ASTM A500 Square Hollow Section Steel Tube – Chemical Composition by Grade | |||||
| Grade | Carbon (C) Max | Manganese (Mn) Max | Phosphorus (P) Max | Sulfur (S) Max | Copper (Cu) Min (when specified) |
| ASTM A500 Grade B | 0.26% | 1.35% | 0.04% | 0.04% | 0.20% |
| ASTM A500 Grade C | 0.23% | 1.35% | 0.04% | 0.04% | 0.20% |
| ASTM A500 Grade B / Grade C Square Steel Pipe – Mechanical Properties | |||
| Grade | Yield Strength (Min) | Tensile Strength (Min) | Elongation (Min) |
| ASTM A500 Grade B | 46 ksi (315 MPa) | 58 ksi (400 MPa) | 23% |
| ASTM A500 Grade C | 50 ksi (345 MPa) | 62 ksi (425 MPa) | 21% |
High Structural Strength
Manufactured to meet ASTM A500 standards, our HSS steel tubes deliver exceptional load-bearing performance. They effectively strengthen overall structural stability while cutting down the total weight of building structures, bringing great optimization for engineering design.
Reliable Dimensional Precision
Featuring consistent wall thickness and highly accurate overall dimensions, these structural steel tubes eliminate size deviations. This superior dimensional consistency greatly simplifies on-site fabrication, assembly and installation work, saving construction time and effort.
Great Weldability & Processability
This series of HSS tubes boasts excellent processing adaptability. It can perfectly undergo common secondary processing including cutting, welding and drilling, fully fitting various customized structural fabrication requirements for different engineering projects.
Enhanced Corrosion Resistance
To adapt to complex outdoor and harsh working environments, we provide hot-dip galvanizing and customized protective coating treatments. These effective surface treatments greatly improve the tubes’ rust and corrosion resistance, extending the service life of structural components.
Optimized Cost Performance
Compared with conventional structural steel components, our ASTM A500 HSS tubes require less steel usage under the same load conditions. They effectively reduce material consumption and lower on-site installation and comprehensive engineering costs, offering a highly cost-effective structural solution.
Square HSS
2" × 2"
3" × 3"
4" × 4"
5" × 5"
6" × 6"
8" × 8"
Rectangular HSS
4" × 2"
6" × 3"
8" × 4"
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.
| Application Fields | Specific Application Scope |
| Commercial Buildings | Commonly used for building structural columns, main and auxiliary building frames, curtain wall support systems, as well as roof truss structures, providing stable and reliable structural support for all types of commercial architecture. |
| Data Center Engineering | Ideal for server rack supporting structures, mechanical and electrical equipment platforms, cable support frameworks and anti-seismic structural frames, meeting the high-standard structural safety requirements of data center operation. |
| Industrial Buildings | Widely applied in steel-structured workshops, storage warehouses, factory manufacturing plants and heavy-duty equipment bearing platforms, adapting to high-load and long-service industrial construction demands. |
| Outdoor & Infrastructure Structures | Suitable for outdoor canopy structures, solar panel mounting brackets, billboard support systems and various municipal infrastructure projects, with strong adaptability to outdoor complex environments. |
Over 10 years of experience exporting steel products worldwide
Supply steel goods complying with ASTM, EN, JIS and GB specifications
Steady production capacity to guarantee prompt lead times
Rigorous quality checks carried out prior to shipment
Accept third-party testing by SGS, BV and other authorized institutions
Offer custom options on dimensions, cut lengths and surface finishes
Professional seaworthy packaging designed for long ocean transit
Provide dedicated technical assistance for international engineering projects
Steel strips for firm bundling
Plastic wrapping to achieve waterproof protection
Pipe end protectors can be supplied on demand
Fits both container and bulk cargo shipping
Custom export packaging solutions available per requirements
Q1. What separates ASTM A500 Grade B from Grade C?
Grade B serves as the common choice for regular structural works. Grade C features elevated yield strength, making it a better fit for heavy-load constructions including data centers, industrial complexes and high-rise developments.
Q2. Do you accept custom sizes?
Absolutely. We can tailor outer dimensions, wall thickness and cut lengths strictly based on your project drawings.
Q3. Is hot-dip galvanizing an option?
Sure. Multiple surface finishes are available to match different working conditions: black bare, anti-rust oil coating, primer painting and hot-dip galvanizing.
Q4. Which shipping documents can you issue?
We provide standard documents including Mill Test Certificate (MTC), packing list and commercial invoice. Certificate of Origin, SGS or BV third-party inspection reports can also be arranged as requested.
Q5. Are you capable of supplying large engineering projects?
Yes. We have rich track records delivering HSS steel tubes to global projects, covering commercial buildings, industrial workshops, data centers, warehouses and various infrastructure developments.
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