JF-20 high tin aluminum based bearings are products made of low-carbon steel plate as the substrate and AlSn20Cu material rolled on the surface. This product has the characteristics of moderate fatigue strength and load-bearing capacity, good corrosion resistance, and good bearing sliding performance. It is commonly used as a bearing for small and medium-sized internal combustion engines, train engines, air pressure machine bushings, refrigeration machine bearings, etc. It is a new product that replaces Babbitt alloy.