Are steel angles hot-rolled?

Production Process: In the hot-rolling process, steel billets are first heated to a high temperature, typically above 1000°C. At this high temperature, the steel becomes malleable and can be easily deformed. The heated billets are then passed through a series of rolling mills. The rollers in the rolling mills apply pressure to the billets, gradually shaping them into the desired angle shape.

Advantages: Hot-rolled steel angles have good mechanical properties. The high-temperature rolling process refines the grain structure of the steel, improving its strength and toughness. They are suitable for use in various large-scale construction and mechanical manufacturing projects. This process is also highly efficient and can produce steel angles in large quantities, making it cost-effective for mass production.

Disadvantages: The surface of hot-rolled steel angles is relatively rough compared to cold-rolled ones. The dimensional accuracy is also slightly lower, with possible deviations in dimensions such as side length and thickness.

Production Process: Cold-rolling is usually carried out at room temperature. It involves using rollers to further process hot-rolled steel angles or other semi-finished products. The rollers apply high pressure to the steel to reduce its thickness and improve its dimensional accuracy and surface smoothness.

Advantages: Cold-rolled steel angles have high dimensional accuracy and a smooth surface finish. This makes them suitable for applications that require high precision, such as in the manufacturing of precision machinery and in some high-end architectural decoration projects. They also have better mechanical properties in terms of hardness and strength due to the cold-working process.

Disadvantages: The production efficiency of cold-rolled steel angles is relatively low compared to hot-rolled ones, and the production cost is higher.