China JIS G3101 Grade Black Square Rectangular Tube

As a cornerstone product from Tianjin Yuantai Derun Steel Pipe Group (YUANTAI DERUN)—a Top 500 Chinese Private Enterprise and global leader in steel pipe manufacturing—the Black Square Rectangular Tube stands out for its unmatched strength, precision, and versatility. Engineered for demanding structural applications across construction, infrastructure, automotive, and industrial sectors, this product exemplifies the company’s commitment to quality, innovation, and sustainability.

Backed by over two decades of expertise and advanced production capabilities, YUANTAI DERUN delivers Black Square Rectangular Tubes that meet the highest international standards. With dimensions ranging from square (10×10×0.5–1000×1000×60mm), rectangular (10×15×0.5–800×1200×60mm), our tubes offer exceptional dimensional accuracy, uniform wall thickness, and superior load-bearing capacity.

Key advantages include:

1. Global Certifications & Compliance: Certified under ISO9001, ISO14001, OHSAS18001, EU CE (EN 10219/10210), BV, DNV, ABS, JIS, and LEED, ensuring reliability for international projects.

2. Advanced Manufacturing Technology: Produced using state-of-the-art ERW/HFW processes and supported by 65 dedicated pipe lines, guaranteeing consistent quality and performance.

3. Premium Raw Materials: Sourced exclusively from top-tier Chinese steel mills including HBIS, Baosteel, and TPCO, ensuring high tensile strength and corrosion resistance.

4. Customizable Specifications: Available in a wide range of sizes, wall thicknesses (0.5–60mm), and surface finishes to suit diverse engineering requirements.

5. Eco-Conscious Production: As part of our green manufacturing initiative, every Black Square Rectangular Tube is produced with energy efficiency and minimal environmental impact in mind.

The Black Square Rectangular Tube features a smooth, oxide-black finish that not only enhances aesthetic appeal but also provides an extra layer of protection against oxidation during storage and transport. Its precise right-angle corners and uniform cross-section make it ideal for welding, machining, and assembly in complex structural frameworks.

Whether used in high-rise buildings, bridge supports, machinery frames, or solar mounting systems, this tube delivers:

● High torsional rigidity

● Excellent weldability and formability

● Long service life with minimal maintenance

● Cost-effective logistics due to optimized weight-to-strength ratio

As a pioneer in structural steel innovation, YUANTAI DERUN continues to push boundaries with over 100 patents and cutting-edge R&D. Our Black Square Rectangular Tube isn’t just a product—it’s a promise of structural integrity, global compliance, and sustainable progress.

Yuantai Derun's MS rectangular tubes are manufactured using reliable methods, including direct forming, round-to-square forming, and round-first-then-square processes.

To enhance performance and relieve internal stress, we offer heat treatment options such as normalizing, annealing, quenching, tempering, and corner heating.

Typical Chemical Composition:

Carbon ≤ 0.20%

Manganese ≤ 1.50%

Phosphorus ≤ 0.030%

Sulfur ≤ 0.030%

Mechanical Properties:

Thickness 3–16mm: Yield ≥ 275MPa, Tensile 410–560MPa, Elongation ≥ 20%

Thickness 16–40mm: Yield ≥ 265MPa, Tensile 410–560MPa, Elongation ≥ 20%

We also provide protective coatings like oiling, painting, and hot-dip galvanizing to prevent corrosion—available for models such as RHS 150x100x8mm BS EN10219 S275J2H.

Contact us for specifications and pricing tailored to your needs.