As the name suggests, explosion-proof chain hoists are suitable for use in flammable and explosive situations, such as chemical industry, offshore and other operations.Explosion-proof hand chain hoists are generally made of aluminum bronze and beryllium bronze. The rotating gears undergo high-temperature heat treatment to achieve high wear resistance of the gears.The chain is not made of pure copper, because there is a certain gap between the tensile strength and toughness of pure copper and manganese steel. Therefore, the chain is made of manganese steel as the main material and uses nickel-plated copper alloy on the surface. While ensuring the tensile strength and toughness, it can also prevent Flammable and explosive.