The wire ropes commonly used for cranes are phosphating coated wire ropes, galvanized wire ropes, stainless steel wire ropes or plastic coated wire ropes, which are used in atmospheric environment. Manganese phosphating coated steel wire rope produced by patented technology has the longest service life, the fatigue life of phosphating coated steel wire rope is 3-4 times that of smooth steel wire rope, and the average daily use cost is only about 30% of smooth steel wire rope. Phosphate coated steel wire rope is an upgraded product of smooth steel wire rope, which is for reference only.