The G80 chain is 4-26 mm. The lifting chain type is distinguished according to the diameter of the chain. The length of the ring chain is three times the diameter, which supports non -standard customization. Its experimental load is 2.5 times, four times broken. The wide range of use can be used not only for hanging cables, but also for the transmission chain of handle gourds and electric gourds. Its raw material is round steel with 20mn2. The production process is made of round steel brushes, editing chains, quenching, welding, heat treatment and other steps. The editing chain welding is made of automatic equipment. The temperature required for heat treatment and the temperature of the need to quench and recover can achieve the required strength and tension. The price of the chain is expensive, depending on the price of raw materials and the production process.