Fake and inferior steel is prone to folding. Folds are various fold lines formed on the surface of steel, and this defect often runs throughout the length of the product. The reason for folding is due to the pursuit of high efficiency by fake and inferior manufacturers. Source: Mold Technology Encyclopedia. The reduction amount is too large, resulting in ears. Folding will occur during the next rolling process. The folded product will crack after bending. The strength of the steel Big drop. The appearance of fake and inferior steel products is often pitted. Source: Mold Technology Encyclopedia Mesh pitting is an irregular uneven defect on the steel surface caused by severe wear of the rolling groove. Due to the pursuit of profits by manufacturers of shoddy and inferior steel products, groove rolling often exceeds the standard. The surface of fake and inferior steel is prone to scarring. There are two reasons: fake and inferior steel materials are uneven and have many impurities. The guide equipment of fake and inferior material manufacturers is simple and easy to stick to steel. These impurities can easily cause scarring after biting the rollers. The surface of fake and inferior materials is prone to cracks because its raw material is adobe, which has many pores. The adobe is subject to thermal stress during the cooling process, causing cracks, and cracks appear after rolling.