What is Cold Bending Performance?

[RowanAnn]

It refers to the ability of metal materials to withstand bending at room temperature without cracking. Below is a detailed introduction to cold bending performance: 1. Definition: Cold bending performance refers to the capability of steel to endure bending deformation at room temperature, which is an important process property of steel. The cold bending test can reflect the plastic deformation at the bending point of the specimen and reveal whether there are defects such as uneven internal structure, internal stress, and inclusions in the steel. 2. Standards: The qualified standard for the cold bending performance of steel bars is that after bending under the specified bending diameter D and cold bending angle α, there should be no cracks, scaling, or fractures at the bending point. According to the technical standards for steel bars, the values of D and α vary for different types of steel bars. For example, for Grade 335 crescent ribbed steel bars, α=180°. When the diameter is not greater than 25mm, the bending diameter D=2d; when the diameter d is greater than 25mm, the bending diameter D=3d.