Q235B Q355 63X63X6 200X200X12 Carbon Equal Angle Steel is a specialized structural steel product designed exclusively for building and construction applications, featuring a symmetrical L-shaped equal cross-section, two high-performance carbon steel grades (Q235B and Q355), and two fixed standard specifications (63X63X6mm and 200X200X12mm). Engineered to meet Chinese GB/T standards and industry-specific building requirements, this equal angle steel delivers exceptional load-bearing capacity, structural stability, and workability, serving as a core component in various building structures, from light-frame constructions to heavy-duty building frameworks.
The product's reliable performance is rooted in its two carefully selected carbon steel grades, Q235B and Q355, each tailored to different building load requirements. Q235B is a Chinese national standard (GB/T 700) carbon structural steel, with the "B" grade indicating notch impact resistance at 20°C-critical for building components that may withstand sudden loads. Its chemical composition is strictly controlled, with a carbon content of 0.12%-0.20%, supplemented by manganese (0.30%-0.70%) and silicon, providing a minimum yield strength of 235 MPa and a tensile strength range of 370-500 MPa. This grade balances cost-effectiveness and basic structural performance, making it ideal for medium-load building applications such as roof trusses, floor joists, and balcony railings.
Q355, a Chinese national standard (GB/T 1591) low-alloy high-strength carbon steel, is an upgraded option for heavy-load building scenarios. With a minimum yield strength of 355 MPa and a tensile strength range of 470-630 MPa, it is enhanced by trace alloying elements (manganese, silicon, vanadium) that significantly improve toughness, impact resistance, and wear resistance. Its carbon content (≤0.20%) and optimized alloy composition ensure excellent structural stability, making it suitable for high-stress building components such as building frames, bridge connections, and heavy-duty supports in large-scale construction projects.
The equal L-shaped cross-section is a defining feature of this product, ensuring balanced force distribution-critical for building applications where structural stability is paramount. Unlike unequal-angle steel, the identical leg length and uniform thickness of the equal-angle design allow for even load transmission, reducing stress concentration and enhancing the overall structural integrity of building frameworks. This design also facilitates easy assembly and connection, improving construction efficiency and ensuring consistent performance across the entire building structure.
Two fixed standard specifications are offered to cater to diverse building needs: 63X63X6mm and 200X200X12mm. The 63X63X6mm specification (leg length 63mm, thickness 6mm) is a medium-sized option, ideal for light to medium-load building components such as wall supports, scaffolding, and small-scale roof trusses. The 200X200X12mm specification (leg length 200mm, thickness 12mm) is a heavy-duty option, designed for high-load applications including main building frames, beam-column connections, and large-span roof supports. Both specifications are produced with strict dimensional accuracy, complying with GB/T 706 standards, ensuring seamless compatibility with other building materials and components.
The product is manufactured using advanced hot-rolling technology, which is essential to its superior quality and suitability for building applications. During production, Q235B and Q355 steel billets are heated to a high temperature (above 1000°C) to soften the material, then subjected to precision rolling to form the symmetrical equal-angle cross-section. This hot-rolling process refines the internal grain structure, eliminates internal defects such as pores, inclusions, and microcracks, and enhances ductility and toughness-ensuring the angle steel can withstand the dynamic and static loads encountered in building structures.
Exceptional workability is another key advantage of this carbon equal angle steel, adapting to the diverse fabrication needs of building projects. It can be easily cut, bent, drilled, and welded using standard industrial methods (arc welding, MIG welding, TIG welding). The optimized chemical composition of Q235B and Q355 minimizes the risk of hardening and cracking in the heat-affected zone during welding, ensuring strong, durable joints that maintain structural integrity-critical for building components that bear long-term loads.
As a specialized building material, this equal angle steel is widely applied in various construction scenarios. The 63X63X6mm specification is commonly used in residential buildings, light commercial structures, and interior decoration, such as wall brackets, window frames, and balcony railings. The 200X200X12mm specification is suitable for large-scale commercial buildings, industrial workshops, and infrastructure projects, serving as main frame components, beam supports, and heavy-duty connectors. Additionally, it is used in temporary construction structures such as scaffolding and formwork, demonstrating its versatility in building applications.
Each batch of Q235B Q355 63X63X6 200X200X12 Carbon Equal Angle Steel undergoes rigorous quality control procedures to ensure compliance with building material standards. Quality inspections include chemical composition analysis, mechanical property testing (yield strength, tensile strength, impact toughness), dimensional accuracy verification, and surface quality assessment. The natural hot-rolled surface can be further treated with hot-dip galvanization, electro-galvanization, or painting to enhance corrosion resistance, extending its service life in outdoor or humid building environments. Combining targeted specifications, reliable material performance, and excellent workability, this equal angle steel is a trusted choice for modern building projects.
