Square Steel Tube – Premium Structural Hollow Sections for Global Engineering Projects Engineered for strength, precision, and adaptability, our square steel tubes are a globally trusted solution across construction, manufacturing, and infrastructure industries. These high-performance hollow structural sections (HSS) meet international standards such as ASTM A500, DIN EN 10219, BS1387, and JIS G3466—ensuring consistent mechanical properties and dimensional accuracy in diverse environmental conditions. Available in sizes from 20x20mm to 800x800mm with wall thicknesses ranging from 0.5mm to 30mm, these seamless and welded profiles deliver exceptional versatility—from lightweight applications like modular furniture to heavy-duty support systems in bridges, offshore platforms, and industrial frameworks. Key features include customizable surface treatments tailored to regional exposure: oil coating for indoor environments, hot-dip galvanizing for coastal or humid areas, black painting for architectural integration, and advanced 3PE anti-corrosion layering for extreme weather zones. Material options span carbon steels including Q195, Q235, Q345, ST37, ST52, S235JR, S355, along with high-strength grades like SS400 and SS500—each selected based on yield strength, weldability, formability, and long-term durability. This flexibility allows engineers to optimize material selection for performance, cost-efficiency, and resilience in global projects. Each batch undergoes rigorous quality control aligned with international specifications such as GB/T3094-2000 (China), ASTM A53 (USA), and EN 10219 (Europe). Customizable lengths between 3 and 12 meters accommodate logistical constraints, while bundled packaging using steel straps and protective plastic film ensures safe transport without damage. With an average lead time of 10–20 days after deposit confirmation, we support timely delivery even for large-scale orders across Europe, North America, Australia, and beyond. These square hollow sections are widely used in architectural frameworks, prefabricated building systems, shipbuilding components, scaffolding solutions, renewable energy installations—including wind turbine towers—and industrial machinery frames. Their uniform geometry enhances load distribution, reduces stress concentrations, and improves welding efficiency—making them ideal for CNC cutting, bending, and automated assembly processes. The smooth finish and rust-resistant coatings significantly lower maintenance costs over time, especially in aggressive environments such as marine zones, chemical plants, or tropical climates. Global users consistently highlight the balance of value and reliability this product delivers. Many commend its consistent stock availability and efficient fulfillment, which helps maintain project schedules in competitive markets. Customers also appreciate the ability to tailor surface protection methods according to local weather patterns—from zinc-coated variants for salty air near oceans to oil-treated tubes for temperate inland regions. Feedback often emphasizes how the tubes simplify fabrication workflows while maintaining structural integrity under dynamic loads. Common inquiries focus on compatibility with different welding techniques—our square tubes perform excellently with MIG, TIG, and arc welding methods—and guidance on enhancing corrosion resistance in marine settings. For salt-laden atmospheres, we recommend galvanized surfaces or dual-layer protective coatings (such as epoxy + polyethylene) for extended service life. Additionally, users frequently ask whether the tubes can be bent or cut without compromising their mechanical properties. Our technical experts confirm that hydraulic press bending and precision cutting operations do not degrade performance when performed within specified parameters, ensuring safe and reliable fabrication outcomes.
Product Categories : Steel Pipe > Seamless Steel Pipe
