Q345b S355jr Structural /I / I/H Standard I Beam H Section Steel

As a professional manufacturer specializing in high-quality structural steel products, our factory supplies premium ASTM/ASME compliant H section steel beams, available in multiple mild carbon steel grades and two advanced manufacturing processes-hot rolled and 10mm cold rolled-with a standard 150X150mm cross-sectional specification. These H beam products integrate superior mechanical performance, precise dimensional accuracy, and broad applicability, catering to the diverse needs of global construction, industrial, and engineering projects, while adhering to strict international quality standards.

Our H section steel beams cover a comprehensive range of mild carbon steel grades, each complying with internationally recognized standards to ensure consistent quality and performance. Q235B, conforming to Chinese GB/T 700 and ASTM standards, is a cost-effective mild carbon structural steel with a minimum yield strength of 235 MPa and a tensile strength range of 375-500 MPa. It exhibits excellent weldability, ductility, and formability, making it suitable for a wide range of light to medium-duty structural applications. S235JR and S275JR, compliant with European EN 10025 standards, offer graded strength: S235JR (minimum yield strength 235 MPa, tensile strength 360-510 MPa) is ideal for light-duty structures, while S275JR (minimum yield strength 275 MPa, tensile strength 370-530 MPa) provides enhanced load-bearing capacity for more demanding applications.

S355J0, another EN 10025 compliant grade, is a medium-strength mild carbon steel with a minimum yield strength of 355 MPa and a tensile strength range of 470-630 MPa. Classified as J0 grade, it offers excellent low-temperature impact toughness (tested at 0℃), making it suitable for projects in moderate cold environments. ASME A36, a globally prevalent grade conforming to ASME and ASTM standards, features a minimum yield strength of 250 MPa (36,000 psi) and a tensile strength of 400-550 MPa (58,000-80,000 psi). Renowned for its balanced performance and versatility, ASME A36 is widely adopted in various construction scenarios, from commercial buildings to bridge components.

Our H beam products are available in two advanced manufacturing processes: hot rolled and 10mm cold rolled, each tailored to specific application requirements. Hot rolled H beams are produced by heating mild carbon steel to 1100-1250℃ and forming it into the 150X150mm H section through continuous rolling. This process refines the steel's grain structure, enhancing its strength, toughness, and ductility, while ensuring uniform cross-sectional geometry and a smooth surface finish. Hot rolled 150X150mm H beams are ideal for heavy-duty structural applications, including high-rise frames, industrial workshops, and long-span bridges, where load-bearing capacity and durability are critical.

The 10mm cold rolled H section steel beams, with the same 150X150mm cross-sectional size, are manufactured through cold rolling at room temperature after hot rolling. This additional process further improves dimensional accuracy, surface smoothness, and mechanical properties, resulting in a more precise and consistent product. The 10mm cold rolled H beams are suitable for applications requiring high precision, such as architectural decorations, light steel frames, and equipment supports, where aesthetic appearance and tight dimensional tolerances are prioritized.

The 150X150mm cross-sectional specification is meticulously designed to optimize structural efficiency, balancing load-bearing capacity and material utilization. The 150mm flanges provide a stable contact area for secure connections-facilitating welding, bolting, and integration with other structural components-while the vertical web efficiently resists shear forces, ensuring the beam's stability under various loads. This specification is a common choice for medium-scale construction projects, offering versatility and compatibility with global construction codes.

As a professional H beam factory, we implement strict quality control throughout the entire production process, from raw material selection and smelting to rolling, finishing, and final inspection. All raw materials are high-quality mild carbon steel that meets ASTM/ASME standards, and each batch of H beams undergoes rigorous testing, including chemical composition analysis, mechanical property verification (yield strength, tensile strength, impact toughness), dimensional accuracy checks, and surface quality inspection. This commitment to quality ensures that our products fully comply with international standards and meet the exacting requirements of global customers.

Our ASTM/ASME compliant H section steel beams, available in Q235B, S235JR, S275JR, S355J0, and ASME A36 grades, with hot rolled and 10mm cold rolled processes and 150X150mm specification, are designed to deliver reliable performance, durability, and cost-effectiveness. Backed by professional manufacturing capabilities and strict quality assurance, our H beams are widely used in global construction, industrial, and engineering projects, making our factory a trusted partner for builders, contractors, and distributors worldwide seeking high-quality mild carbon steel H beam solutions.