... experience Steel forging auto parts1,Name: Steel forging auto parts;Steel auto parts;Forging auto parts 2,For the similar auto parts,what can ... we do ?1), Ability for the material of this kind of auto parts: Grade3.6,4.6,4.8,5.6 ... coating,electrophoretic coating,etc Polishing Grinding and polishing,etc,except mirror finish (3),Ability for the tolerance Roundess0.002mmCylindricity0.003mmRoughnessRa0 ...