Angle steel, also known as angle iron or steel angle, is typically manufactured through a process known as hot rolling. Hot rolling is a metalworking process used to shape and form steel into various profiles, including angle sections. Here's an overview of how angle steel is made:
Selection of Raw Materials: The process begins with the selection of raw materials, typically low-carbon steel or mild steel. Low-carbon steel is favored for its ease of processing and versatility.
Heating the Billet: The raw steel material is first heated in a furnace to a temperature that is above its recrystallization point. This makes the steel easier to shape and deform.
Rolling Process: The heated steel billet is then passed through a series of rollers in a rolling mill. These rollers have grooves or contours that are designed to shape the steel into the desired profile. For angle steel, two sets of rollers are used simultaneously, one for each leg of the angle. The rollers gradually bend the steel into an L-shaped cross-section, forming the angle.
Cooling: After passing through the rollers, the newly formed angle steel is cooled, typically by air or water, to stabilize its shape and properties.
Cutting: The continuous length of angle steel is cut into individual pieces of the desired length, typically using saws or shears.
Surface Treatment (Optional): Depending on the intended use and application, angle steel may undergo additional processes such as shot blasting, painting, or galvanizing to enhance its appearance and corrosion resistance.
Quality Control: Quality control measures are employed throughout the manufacturing process to ensure that the angle steel meets specified standards for dimensions, tolerances, and material properties.
Packaging and Distribution: The finished angle steel is packaged and prepared for distribution to customers. It is often bundled together in packs for easier handling and transportation.