







Angle steel, renowned as angle iron, is a long strip of steel characterized by its perpendicular sides, promising both durability and versatility. Below is a detailed exploration of angle steel's defining features:
1. Classification and Specifications
Angle steel is predominantly categorized into two distinctive types: equilateral angle steel and unequal angle steel. Equilateral angle steel boasts sides of equal length, with its dimensions expressed in millimeters as "edge width x edge width x edge thickness", for example, "∠ 30 x 30 x 3", symbolizing a robust equilateral angle steel with a 30-millimeter edge width and a 3-millimeter edge thickness. Conversely, unequal angle steel offers varied side lengths, enhancing its adaptability and versatility in diverse applications.
Domestically produced angle steel ranges in specifications from 2 to 20 centimeters, with side lengths denoted in centimeters. A single type of angle steel frequently offers 2 to 7 distinct edge thicknesses. Imported variants must specify actual dimensions, edge thickness on both sides, and adhere to pertinent standards, ensuring consistency and quality.
2. Production Methods
Hot Rolling: This is the predominant production method, ideal for manufacturing standard-sized angle steel in large volumes, ensuring economical and efficient production.
Cold Drawing: Tailored for crafting angle steel with precise dimensions and stringent tolerances, this method ensures enhanced strength and superior surface quality.
Forging: Primarily utilized for larger or specialized angle steel, this process achieves improved grain structure, boosting overall performance and durability for demanding applications.
3. Features and Applications
Angle steel is celebrated for its exceptional weldability, plastic deformation capacity, and substantial mechanical strength. As a carbon structural steel integral to construction, it is classified under simple section steel, pivotal in foundational engineering.
Widely embraced in construction and engineering, angle steel is indispensable in creating beams, bridges, transmission towers, lifting machinery, ships, industrial furnaces, reaction towers, container racks, and warehouses.
It serves as a critical component in forming various load-bearing structures, adaptable to diverse architectural needs, and functions as a vital connector between structural elements, ensuring stability and strength.
4. Additional Information
The chemical composition of angle steel is primarily verified through key indicators: C, Mn, P, and S, each varying in content to meet specific material strength and durability requirements.
Angle steel delivery lengths are classified into fixed and double lengths, with the domestic fixed length selection varying according to specification numbers, offering flexibility and customization.
To approximate the weight of angle steel, the formula is: weight per meter = 0.00785 × (edge width + edge width - edge thickness) × edge thickness. For precise measurements, refer to the relevant hardware manual, as this formula offers only a general estimate.
In conclusion, the unique geometry and superior mechanical properties of angle steel make it an essential component across numerous sectors, reinforcing its status as a cornerstone in structural engineering and construction.