The level of the lifting chain is widely used. The G80 chain has standards during production, such as distance, tension, and load. After high temperature quenching treatment, low temperature recovery treatment to achieve standard load and tension. Many people are asking why the parameters of the chain do not indicate its hardness? So the higher the hardness, is it more durable? The hardness of the chain is high, the brittleness becomes larger, the toughness of the chain decreases, the chain test type is easy to break, and the chain is easy to deform.