Folds are various creases formed on the surface of steel, and this defect often runs through the entire product longitudinally. The reason for the folding is that in order to pursue high efficiency, the counterfeit and inferior manufacturers have a large amount of down pressure, which will cause ears and folds during down rolling. The folded product will crack after bending, and the steel strength is low. decrease very much

Copper is widely used in various products for its excellent electrical and thermal conductivity, good strength, good formability and corrosion resistance. Pipes and fittings are often made from these metals due to their corrosion resistance. They can be easily welded and brazed, and many can be welded by various gas, arc and resistance methods. They can be buffed and polished to almost any desired texture and sheen.