How to identify inferior steel

 How to identify inferior steel

1. Shoddy steel is prone to folding. Folding is a variety of fold lines formed on the surface of steel, and this defect often runs through the longitudinal direction of the entire product. The reason for the folds is that the counterfeit and inferior manufacturers pursue high efficiency, and the reduction is too large, resulting in ears. Folds will occur in the next rolling process, and the folded products will crack after bending, and the strength of the steel will drop greatly.

 2. Fake and inferior steel products often have pockmarks on the surface. Pockmarked surface is a defect of irregular unevenness on the surface of the steel due to severe wear of the rolling groove. Because manufacturers of fake and inferior steel products want to pursue profits, it often happens that groove rolling exceeds the standard.

 3. The surface of fake and inferior steel is prone to scarring. One is that the material of fake and inferior steel is uneven and there are many impurities. The other is that the guides and guards of fake and inferior steel manufacturers have poor equipment and are easy to stick to steel. These impurities are prone to scarring after biting the roll. 

4. The surface of fake and inferior materials is prone to cracks. The reason is that its billet is adobe, and the adobe has many pores. During the cooling process, the adobe is subjected to thermal stress, causing cracks, and there are cracks after rolling. 

5. False and inferior steel is easy to scratch. The reason is that the fake and inferior steel manufacturers have poor equipment, which is easy to produce burrs and scratch the surface of the steel. Deep scratches reduce the strength of the steel. 

6. False and inferior steel has no metallic luster and is light red or similar in color to pig iron. There are two reasons for this. Second, its blank is adobe. 

7. The rolling temperature of counterfeit and inferior steel is not standard, and their steel temperature is measured visually, so it cannot be rolled according to the specified austenite area, and the performance of the steel cannot meet the standard naturally. 

8. The horizontal ribs of fake and inferior steel are thin and low, and often appear to be full of dissatisfaction. The reason is that in order to achieve a large negative tolerance, the reduction in the first few passes of the finished product is too large, the iron shape is too small, and the pass is not full.

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