I am the United States produced by the American crusher hammer is a double metal composite technology, is for different materials, different service conditions carried out under a combination of various alloy elements, through the furnace before the special purification, different material liquid Interface processing, thereby improving the life of the hammer and the use of hardness. American crusher hammer part of the hardness of the hardness of HRC63-66 (usually HRC 56-61), the device connection for the high strength and tough structural steel.