valve cover casting main materials:M-30C,M-35-2,M-35-1, ... MK-500,CY-40,CW-6MC foundry technique:investment & sand casting MaterialM-30C,M-35-2,M-35-1,MK-500 ... abilityspectrograph,heat treatment,Mechanical properties testServiceOEM service availableProductall kinds of casting(unit weight ≥5kg)AdvantageGood quality and strict delivery time