... manufacturer 4.ductile iron elevator parts ductile iron elevator parts:Materials: gray iron, ductile iron, carbon steel, ... DIN, EN, ISO Operation: green sand casting and resin sand casting Surface finish: sand blasting, sand blasting, oiled, zinc, nickel, chrome ... handwheel, valve, flange, bollard, pilingaccessories, counterweight iron, construction machinery parts and other industry machinery parts ...