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Angle steel type specification
Angle steel is primarily categorized into two types: equal leg angle steel and unequal leg angle steel. Among these, unequal leg angle steel can be further divided into two categories: one where the widths of the legs are different, and another where the thicknesses of the legs vary.
The specifications of angle steel are typically indicated by the dimensions of the leg length and the thickness. In China, the common size range for angle steel is from 2 to 20 centimeters in leg length, with the number representing the actual dimension. Each standard size of angle steel may have between 2 to 7 different thickness options. For imported angle steel, the actual dimensions of both sides and their thickness are clearly specified, along with the relevant international standards.
Angle steel is generally classified based on its leg length. Steel with a leg length of 12.5 cm or more is considered medium-sized, while those between 5 cm and 12.5 cm are classified as small. The order of import and export is usually determined by the specific requirements of the application, and the grade corresponds to the appropriate carbon steel grade. Additionally, apart from the size specification, angle steel does not have a defined series of chemical composition or performance characteristics.
The delivery length of angle steel is typically either fixed or double-length. In China, the fixed lengths vary depending on the size, ranging from 3-9 meters, 4-12 meters, 4-19 meters, and 6-19 meters. Japanese angle steel is commonly available in lengths from 6 to 15 meters.
For unequal angle steel, the height of the cross-section is measured by the width of the longer leg. This type of steel features an angular cross-section with unequal leg lengths. It is widely used in various industries such as metal structures, bridges, machinery, shipbuilding, and construction. Common applications include beams, bridge trusses, transmission towers, lifting equipment, ships, industrial furnaces, and storage systems.
The general specifications for unequal angle steel range from ∠50×32 up to ∠200×125, with thicknesses varying from 4mm to 18mm. These products are manufactured using hot rolling mills, ensuring durability and structural integrity. Due to its versatility and strength, unequal angle steel plays a crucial role in modern engineering and construction projects.