Hot Rolled Cold Rolled 20 25 30 35 40mm ASTM A36 A53 Q235 Q345 Equal Unequal Angle Steel

Angle steel can be composed of various stress components according to different needs of the structure, and can also be used as a connector between components. Widely used in various building structures and engineering structures, such as beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks, cable trench supports, power piping, busbar support installation, and warehouses shelves etc.
Types of angle steel: mainly divided into two types: equilateral angle steel and unequal side angle steel, among which unequal side angle steel can be divided into two types: unequal sides and equal thickness and unequal sides and unequal thickness.

Our hot rolled and cold rolled angle steel, available in both equal and unequal leg configurations and compliant with ASTM A36, ASTM A53, Q235, and Q345 standards, represents a comprehensive and high-performance line of structural steel profiles engineered for diverse industrial and construction applications. As fundamental components in structural engineering, these angle steels are characterized by their L-shaped cross-sections-with equal legs for balanced load distribution and unequal legs for specialized load-bearing scenarios-delivering exceptional structural rigidity, versatility, and reliability across a wide range of project requirements.

The product line encompasses a diverse range of authoritative material standards, catering to both international and domestic market demands. Internationally recognized ASTM A36 carbon structural steel offers a minimum yield strength of 250 MPa and tensile strength of 400-550 MPa, renowned for its excellent ductility and weldability, making it suitable for general structural applications. ASTM A53, primarily specified for seamless and welded steel pipes, extends its utility to angle steel used in fluid transport-related structures, ensuring compatibility with piping systems. Domestically, Q235 (yield strength 235 MPa) and Q345 (yield strength 345 MPa) grades provide options for light to heavy-duty applications: Q235 is a cost-effective choice for general construction, while Q345's higher strength meets the demands of heavy-load structures such as bridges and industrial workshops. This multi-standard coverage ensures the angle steel can be tailored to specific project specifications and regional regulatory requirements.

Manufacturing processes include both hot rolling and cold rolling, each optimized to enhance product performance for specific applications. Hot rolled angle steel is produced by heating steel billets to high temperatures (above recrystallization temperature) before rolling, resulting in a refined grain structure that improves toughness and impact resistance. It features a slightly scaled surface and is ideal for heavy-duty structural components, where strength and cost-effectiveness are prioritized. Cold rolled angle steel, by contrast, is processed at room temperature after hot rolling, achieving tighter dimensional tolerances, a smooth surface finish, and higher surface hardness. This makes it suitable for precision applications such as architectural details, furniture framing, and equipment components requiring aesthetic appeal and exact dimensions. Strict quality control is implemented throughout both processes, with rigorous inspections of chemical composition, mechanical properties, dimensional accuracy, and surface defects to ensure consistent product quality.

Both equal and unequal angle steel variants offer unique advantages tailored to different structural needs. Equal angle steel (equal leg length and thickness) ensures uniform stress distribution, making it ideal for frames, trusses, bracing systems, and connecting brackets where balanced load-bearing is critical. Unequal angle steel, with one leg longer than the other, provides enhanced rigidity in one direction, suitable for applications such as edge reinforcement, beam flanges, and structures requiring asymmetric load support. All variants exhibit excellent weldability and machinability, compatible with conventional welding techniques (shielded metal arc welding, gas metal arc welding, submerged arc welding) and machining processes (cutting, drilling, bending). This versatility allows for flexible fabrication into custom components, reducing assembly time and labor costs in construction and manufacturing projects.

Our hot rolled and cold rolled angle steel (ASTM A36, A53, Q235, Q345; equal and unequal) finds extensive application across industries, including building construction (residential complexes, commercial malls, industrial warehouses), infrastructure (bridges, railways, highways), mechanical manufacturing (equipment frames, brackets), and architectural engineering (decorative structures, curtain wall supports). The product's adaptability to diverse materials, processes, and configurations makes it a versatile solution for both general and specialized projects. Backed by strict quality assurance systems and compliance with international and domestic standards, our angle steel delivers reliable performance, structural safety, and long-term durability. Whether for large-scale infrastructure projects or precision manufacturing applications, this comprehensive product line provides cost-effective and tailored solutions to meet the most demanding structural requirements.