... : Ductile iron manhole CoverFeatures:1) Moulding Process: green sand casting, resin sand casting 2) Materials: ductile iron3) Melting facilities: Electric ... various kinds of castings such as farm tractor parts (gear box casing, differential casing, wheel ballast, etc.), auto parts, ... parts, pipe fittings, valve body, fire hydrant, Manhole cover etc. We also supplygray castings as per the customer's ...