The chain is used in grain machinery. The chain material is made of high-quality alloy steel, and the chain plate and pin shaft are made of high-quality mediumcarbon alloy steel. After overall heat treatment, the chain has high tensile strength and wear resistance, and the phenomenon of chain elongation and fracture is avoided in the process of use. And the chain has ultra-high wear resistance, and can be used for a long time without wear,

The sleeve is made of high-quality low-carbon alloy steel, which has high surface hardness after surface carburizing. It has the characteristics of soft core and hard surface. It will not crack and crack under long-time impact load. At the same time, due to the high surface hardness, the sleeve will not be worn in use.