48x152 mine manganese steel chain, lifting chain, a chain strength steel grade: B, C grade, D grade, mining of high-strength non-standard chain, non-standard chain manufacturers First, we come to know about the history of the development of the chain: Mine high-intensity ring chain development mainly in the following aspects, namely the development of high-intensity mining ring chain steel, heat treatment technology, ring size and shape optimization, design and manufacture of different chain chain technology development of. Due to these developments, mining mechanical performance and reliability of high-intensity ring chain has gained greatly improved, some of the world advanced manufacturing production chain ring chain specifications and mechanical performance has far exceeded the current international Des DIN22252 standard widely used. Ring chain service conditions are: (1) under tension; (2) the fatigue generated by pulsating load; (3) chain ring and chain link between the chain rings and sprockets, chains and rings and the board slots help generate friction and wear between; (4) corrosion from coal, rock powder and humid air role. To ensure the quality of welding mining ring chain, manual arc welding and resistance butt welding has been eliminated, due to the high degree of flash butt welding automation, low labor intensity, stable product quality and other advantages, are widely used. Mine high-intensity ring chain ring size, shape and chain structure has been improved and optimized. These improvements are based on the chain of stress analysis and optimization results and the need to increase the power and mining equipment in coal mine under restricted space conditions made yet. 80 is a high-intensity lifting chain lifting chain, high-intensity lifting chain is made of high-strength manganese steel, while just 80 lifting chain is made of high-strength manganese steel, so said 80 lifting chain is a mine of high-intensity lifting chain with a chain, stainless steel chain, slag conveyor chain, hoist chain, 80 high-strength chain