Q345 Carbon Steel Pipe, compliant with Chinese GB/T 1591 standard, is a high-strength, low-alloy structural pipe widely used in construction, machinery, and energy sectors. Crafted from carbon-manganese steel with controlled carbon (≤0.20%) and manganese (1.00%-1.60%) content, it achieves yield strength ≥345 MPa and tensile strength 470-630 MPa, ensuring exceptional load-bearing capacity and toughness. Manufactured via hot-rolling or cold-drawn processes, it offers dimensional accuracy, excellent weldability, and corrosion resistance, making it ideal for bridges, pipelines, and pressure vessels.

ASTM A106 rectangular and square tubing, crafted from carbon steel grades A, B, or C, meets rigorous international standards for high-temperature and high-pressure applications. Manufactured through hot-rolling or cold-drawing processes, these non-circular profiles retain the same chemical composition and mechanical properties as their circular counterparts, including yield strengths from 205 MPa (Grade A) to 275 MPa (Grade C) and tensile strengths up to 485 MPa. Ideal for structural frameworks, fluid transport systems, and heat-resistant installations in petrochemical, power generation, and industrial engineering sectors, these tubing solutions offer exceptional dimensional accuracy, corrosion resistance, and load-bearing capacity.

ASTM A53 rectangular and square tubing, available in Grade A (ferritic) and Grade B (carbon-manganese), offers versatile solutions for general-purpose structural and fluid transport applications. Manufactured through electric-resistance welding (ERW) or seamless processes, these profiles adhere to strict chemical limits (e.g., 0.25% max carbon for Grade A, 0.30% max for Grade B) and meet tensile strength requirements up to 415 MPa. Ideal for low-pressure systems, construction frameworks, and mechanical assemblies, the tubing provides excellent weldability, formability, and corrosion resistance.

ASTM A672 rectangular and square tubing, designed for high-temperature and high-pressure applications, offers robust solutions for industries like petrochemical, power generation, and oil/gas processing. Manufactured from carbon-manganese steel grades (e.g., C55, C60, C65) with controlled carbon content (0.24%-0.28%) and manganese (0.85%-1.20%), these profiles undergo electric-fusion-welded (EFW) processes and heat treatment (e.g., normalizing) to achieve superior mechanical properties, including yield strengths from 310 MPa to 415 MPa and tensile strengths up to 550 MPa. Ideal for structural supports, pipeline frameworks, and heat-exchanger systems, the tubing ensures exceptional corrosion resistance, dimensional stability, and load-bearing capacity under extreme conditions.

ASTM A36 rectangular and square steel tubing, conforming to ASTM A36/A36M-19 standards, is a versatile carbon structural steel product widely used in construction, machinery, and engineering. With a maximum carbon content of 0.29%, it offers excellent tensile strength (400-550 MPa), elongation (≥20%), and weldability, suitable for cold forming, hot rolling, and surface treatments. Its rectangular/square profiles enhance torsional rigidity, making it ideal for structural frames, bridges, equipment supports, and agricultural machinery. Leveraging efficient production and global supply chains, we deliver competitive pricing, quick lead times, and technical support to optimize project safety, durability, and economy.

ASTM A500 rectangular and square tubing offers exceptional structural integrity for diverse industrial applications. Manufactured to meet rigorous ASTM standards, these cold-formed, electric-resistance-welded carbon steel tubes provide superior strength-to-weight ratios, dimensional precision, and corrosion resistance. Available in Grade B (min 46ksi yield) and Grade C (min 50ksi yield), they suit demanding projects from building frameworks and infrastructure to machinery fabrication. The uniform geometry ensures easy welding, forming, and machining, while optional galvanized finishes enhance durability in harsh environments. Ideal for architects, contractors, and engineers seeking reliable, cost-effective solutions, our A500 tubing combines strict quality control with versatile sizing options.

S235JR rectangular and square tubing, compliant with European standard EN 10025-2, offers versatile structural solutions for construction, machinery, and transportation sectors. Crafted from non-alloy carbon steel with controlled carbon content (≤0.22%) and manganese (0.55%-1.70%), these profiles achieve a minimum yield strength of 235 MPa and tensile strength ranging 360-510 MPa. Manufactured through hot-rolling or cold-forming processes, they ensure dimensional precision and surface quality (FA/FB grades) while maintaining excellent weldability, formability, and corrosion resistance. Ideal for building frameworks, bridge components, and industrial equipment, S235JR tubing provides cost-effective reliability under static/dynamic loads, with optional galvanization for enhanced durability.

S355JR rectangular and square tubing provides robust structural performance for heavy-duty applications requiring high strength and durability. Conforming to EN 10025-2 standards, this hot-rolled carbon steel tubing features a minimum yield strength of 355 MPa, offering superior load-bearing capacity for construction, infrastructure, and industrial projects. Its excellent weldability, formability, and machinability enable seamless integration into frameworks, machinery, and transportation systems. Available in precise dimensions with optional galvanized coatings, S355JR tubing resists corrosion and environmental degradation, making it ideal for bridges, towers, and renewable energy installations.

SS400 rectangular and square tubing, compliant with Japanese JIS G3101 standard, offers cost-effective structural solutions for construction, machinery, and infrastructure projects. Crafted from carbon-manganese steel with controlled carbon (≤0.22%) and manganese (≤1.40%) content, it achieves yield strengths from 215-245 MPa and tensile strengths of 400-510 MPa. Manufactured through hot-rolling or cold-forming processes, these profiles ensure dimensional accuracy, excellent weldability, and surface quality. Ideal for building frameworks, bridge components, and industrial equipment, SS400 tubing provides reliable performance under static/dynamic loads, with optional galvanization for enhanced durability.

Q235B rectangular and square steel tubing, compliant with GB/T 700-2006 standards, is a cost-effective carbon structural steel widely used in construction, machinery, and infrastructure. With a carbon content of 0.12-0.20%, it offers balanced tensile strength (370-500 MPa), yield strength (≥235 MPa), and elongation (≥25%), enabling excellent weldability and cold-forming performance. Manufactured under ISO 9001-certified processes, our products ensure reliability and affordability. Leveraging efficient production and global logistics, we deliver competitive pricing, rapid delivery, and tec

Q345B rectangular and square tubing delivers high-strength performance for demanding structural applications, conforming to Chinese GB/T 1591-2018 standards. With a minimum yield strength of 345 MPa and excellent tensile properties (470-630 MPa), this low-alloy steel offers superior load-bearing capacity and durability. Its hot-rolled carbon structure ensures exceptional weldability, formability, and machinability, making it ideal for construction frameworks, industrial machinery, and infrastructure projects.

Q460B rectangular and square tubing is a high-strength, low-alloy structural steel product designed for demanding engineering applications. With a minimum yield strength of 460 MPa, it offers exceptional durability and load-bearing capacity, making it ideal for construction, machinery, bridges, and industrial frameworks. Available in various sizes and customizable lengths, Q460B tubing provides versatile solutions for projects requiring robustness and efficiency. Trusted by global industries, it combines cost-effectiveness with