Q235B 50*50*5mm equilateral hot-rolled angle steel, a high-performance carbon structural steel product with a standard L-shaped cross-section, is specifically engineered for building and construction applications, combining precise dimensions, reliable mechanical properties, and excellent workability. As a specialized variant of the Q235 series-one of the most widely used carbon steel grades globally-this equilateral angle steel is manufactured via advanced hot-rolling technology, adhering to strict Chinese national standards (GB/T 700-2006) and dimensional specifications, making it an indispensable structural component in residential, commercial, and industrial building projects.
The defining feature of this angle steel is its equilateral design and precise dimensions: 50mm×50mm equal legs with a uniform thickness of 5mm. This symmetrical L-shaped cross-section ensures balanced load distribution across both perpendicular legs, providing exceptional structural stability and load-bearing capacity, which is critical for building applications requiring consistent support. The 5mm thickness strikes an optimal balance between weight and strength, making it lightweight enough for easy transportation and installation while maintaining sufficient rigidity to withstand static and moderate dynamic loads in building frameworks.
Manufactured from Q235B carbon steel, this angle steel exhibits superior mechanical properties tailored to building industry requirements. Q235B is a medium-carbon structural steel grade with a controlled chemical composition-primarily carbon (≤0.22%), silicon (≤0.35%), manganese (≤1.40%), and trace impurities-which contributes to its excellent ductility, toughness, and weldability. Key mechanical parameters include a minimum yield strength of 235 MPa, a tensile strength range of 375-500 MPa, and a minimum elongation of 26%. Unlike lower-grade Q235 variants, Q235B undergoes room-temperature (20°C) impact testing, ensuring it maintains structural integrity even under sudden stress or temperature fluctuations, a crucial requirement for building safety.
The hot-rolling process employed in its production further enhances the material's performance and workability. Raw Q235B steel billets are first subjected to rigorous pre-inspection to verify chemical composition and purity, ensuring compliance with grade standards. The billets are then heated to a controlled high temperature (1100°C–1250°C) to maximize plasticity, eliminating brittleness and enabling seamless shaping. Subsequently, the heated billets are passed through a series of calibrated rolling mills, which precisely form the 50mm×50mm×5mm equilateral L-shape, ensuring uniform thickness, tight dimensional tolerances (±0.3mm for leg length and ±0.2mm for thickness), and a refined grain structure. This process also results in a slightly textured surface that promotes strong adhesion with welding materials and surface coatings, enhancing long-term durability.
Its excellent workability makes this Q235B angle steel highly adaptable to diverse building applications. It exhibits superior weldability, compatible with common welding methods such as arc welding, gas welding, and resistance welding, enabling seamless integration with other steel components (e.g., beams, columns, purlins) in building frames without the need for pre-heating or special additives. Additionally, the material can be easily cut, punched, bent, and drilled using standard construction equipment, allowing for customization to fit unique building designs, such as corner bracing, roof truss supports, and wall framing.
In building applications, this 50*50*5mm equilateral angle steel serves a wide range of critical functions. It is commonly used as framing components in light steel buildings, residential roof trusses, and commercial building partitions; as bracing and reinforcement elements in concrete structures (e.g., column brackets, beam supports, and foundation reinforcements); and as edge protection and framing for doors, windows, and balconies. Its versatility also extends to secondary building components, such as scaffolding supports, temporary formwork, and decorative trim, making it a cost-effective and multi-functional material for building projects of all scales.
To ensure consistent quality and reliability, each batch of Q235B 50*50*5mm angle steel undergoes strict quality control measures throughout production and inspection. Tests include chemical composition analysis, mechanical property evaluation (yield strength, tensile strength, elongation, and impact toughness), dimensional accuracy checks, and surface quality inspections, eliminating defects such as cracks, inclusions, uneven thickness, and surface scratches. The product is also available with optional surface treatments-such as hot-dip galvanizing, painting, or powder coating-to enhance corrosion resistance, extending its service life in outdoor or humid building environments (e.g., exterior framing, balconies) with minimal maintenance.
Furthermore, this equilateral hot-rolled angle steel offers excellent cost-effectiveness, a key advantage for large-scale building projects. Its standardized production, abundant raw material supply, and easy workability reduce fabrication and installation costs, while its durable performance and long service life minimize maintenance and replacement expenses over the building's lifecycle. This combination of quality, performance, and affordability makes it the preferred choice for contractors, engineers, and builders seeking reliable structural components for building applications.
In summary, Q235B 50*50*5mm Equilateral Hot-Rolled Angle Iron Steel is a specialized, high-performance structural material engineered specifically for the building industry. Its precise equilateral dimensions, superior Q235B mechanical properties, advanced hot-rolled manufacturing, and excellent workability make it a versatile and reliable component for a wide range of building applications. Backed by strict quality control standards and cost-effectiveness, it delivers consistent structural support, easy installation, and long-term durability, ensuring the safety and stability of residential, commercial, and industrial buildings.
