How to distinguish fake and inferior steel in appearance?

Fake and inferior steel is easy to fold. Folding is a variety of fold lines formed on the steel surface. This kind of defect often runs through the longitudinal direction of the whole product. The reason for folding is that the fake and inferior manufacturers pursue high efficiency, the reduction is too large, the ears are produced, the folding occurs in the next rolling, the folded products will crack after bending, and the strength of the steel will be greatly reduced.

There are often pockmarks on the surface of fake steel. Pockmarked surface is a kind of irregular uneven defect on the surface of steel due to the serious wear of rolling groove. Because the fake and inferior steel manufacturers want to pursue profits, the rolling groove often exceeds the standard.

There are two reasons for scabbing on the surface of fake and inferior steel:
1. The material of fake and inferior steel is uneven and there are many impurities.
2. The guide and guard equipment of the fake and inferior material manufacturers is simple and easy to stick steel, and these impurities are easy to produce scars after biting the roller.

The reason why the surface of the fake and inferior material is easy to crack is that its blank is adobe, and there are many air holes in the adobe. During the cooling process, the adobe is cracked due to the effect of thermal stress, and there will be cracks after rolling