According to the construction of automotive ball joints, most frequent failures occur in ball joint stud ball surface and socket. In order to assess the quality of restored ball joints, the restoration methods were analyzed. As the socket is made of softer material compared to the stud ball, no cases of damage to the stud ball without damaging the socket have been observed. Restored ball joints were sectioned and analyzed. The damage pertaining to minor damage to the ball and stud, Minor damage to the stud and major damage to the ball and Major damage to the ball and stud have been identified and observed. A 43 % reduction of strength was observed when the stud ball was just polished when it suffered a minor damage. However, a hardness reduction of 66 % was observed in the welded section compared to that of the case hardened section of the parent material.