SJ-1

The product is made of high quality low carbon steel, and sintered and rolled copper allot as it’s surface . It has high fatigue strength, load capacity and impact strength. The product is applied to con-rod of automobile engines , transmission gearbox, engineering and agriculture machinery ad so on. 

SJ-2

The product is made of high quality low carbon steel strip, and sintered and rolled tin-bronze-alloy as it’s surface . It has high fatigue strength, load capacity and impact strength .. The product is applied to main shaft and con rod shaft of internal combustion engine with heavy capacity and high speed.

SJ-4

The product is made of high quality low carbon steel, rolled with aluminium-tin alloy on surface with special techniques.  It has medium fatigue strength, load capacity and good corrosion-resistance.  The product is applied to main shaft and con rod shaft of internal combustion engine , pressure squeeze machine and cooling machine.