Engine Connecting Rod is created from AISA8620 and JIS SCM420H case-hardened steel. Our jet skis connecting rod and engine connecting rods also undergo double forging and precision to be finished. The carburizing depth of our heat treatment is 0.8~1.2m/m and the hardness degree is HRC60-62. After passing through sub-zero treatment and honing, the roundness tester is within 0.003 and the surface tester Ra is within 0.2. 
In order to reach the best quality, our company also processes with the most advanced machinery from Japan, U.S.A and Germany so that the con-rod’s parallel distortion can fill the requirements.