Our cold rolled carbon steel angle, also referred to as bar iron, is a high-precision structural component available in key specifications of 25mm and 50mm, crafted from premium Q235 and SS grade carbon steel. Adhering to relevant international and national standards, this cold rolled angle steel stands out for its superior dimensional accuracy, smooth surface finish, and reliable mechanical properties, making it a versatile choice for various light-duty to medium-duty structural applications, including machinery manufacturing, hardware fabrication, building decoration, and precision engineering.
Distinguished from hot rolled angle steel, this product is manufactured through advanced cold rolling technology, a precision processing method that operates at room temperature without heating the steel billets. The cold rolling process involves passing Q235 and SS carbon steel billets through a series of calibrated rolls, applying continuous pressure to form the characteristic L-shaped cross-section (available in both equal and unequal leg configurations) with strict control over dimensions. This process not only ensures exceptional dimensional precision-with uniform leg length (25mm and 50mm) and thickness, as well as perfect right-angle accuracy-but also refines the internal grain structure of the steel, enhancing its surface hardness, tensile strength, and surface smoothness, with no visible defects such as burrs, cracks, or unevenness.
The Q235 and SS grade carbon steels selected for this cold rolled angle steel are carefully chosen for their balanced performance and cost-effectiveness. Q235, a Chinese standard mild carbon steel (GB/T 700), features a carbon content ranging from 0.14% to 0.22% and a minimum yield strength of 235 MPa. It offers excellent ductility, weldability, and machinability, allowing for easy cutting, drilling, bending, and assembly, making it suitable for general structural and decorative applications. SS grade carbon steel, typically conforming to Japanese industrial standards, is a high-quality mild steel with moderate carbon content, boasting good toughness, corrosion resistance, and formability, ideal for precision components and applications requiring a smooth surface finish.
The 25mm and 50mm specifications refer to the leg length of the angle steel, catering to different load-bearing and installation needs. The 25mm angle steel, with its compact size, is ideal for lightweight structural components, such as hardware brackets, decorative frames, small machinery supports, and precision equipment accessories, where space is limited and moderate strength is required. The 50mm angle steel, with larger leg length, provides enhanced rigidity and load-bearing capacity, suitable for medium-duty applications, including building interior decoration, light steel frames, furniture structures, and mechanical base supports.
As a cold rolled product, this carbon steel angle offers unique advantages over hot rolled alternatives. Its cold-worked structure ensures higher surface hardness and dimensional stability, reducing the risk of deformation during installation and use. The smooth surface finish eliminates the need for additional polishing or processing, saving time and cost in subsequent fabrication. Additionally, both Q235 and SS grade cold rolled angle steel exhibit good weldability and compatibility with other structural components, enabling secure connections through welding, bolting, or riveting to form integrated structural systems.
To further enhance durability and corrosion resistance, the cold rolled carbon steel angle can be subjected to surface treatments such as electroplating, galvanization, or anti-rust painting. These treatments form a protective barrier against oxidation, moisture, and wear, extending the product's service life in both indoor and outdoor environments, including humid and mild industrial settings. All products undergo strict quality control throughout the production process, with comprehensive testing of chemical composition, mechanical properties, dimensional accuracy, and surface quality to ensure compliance with industry standards and customer requirements.
With its precision cold rolling process, premium Q235 and SS carbon steel materials, and versatile 25mm and 50mm specifications, this bar iron angle steel is a reliable and cost-effective solution for diverse applications. Its combination of high dimensional accuracy, smooth surface, and balanced mechanical properties makes it a preferred choice for engineers, manufacturers, and fabricators seeking high-quality cold rolled structural components to optimize product performance and reduce fabrication costs.
