... ' information: Our main products include: i) alloy cast irons, gray iron, Ductile iron parts (G3000, G3500, GG20, GG25, GG30, GG35, GGG40, GGG50 ... Cr-Mo, L-NiCuCrl562.1563) , ii) grey high-carbon cast iron iii) high-silicon,high carbon contents (the carbon content can ... quality products. We take quality and service in top , and warmly greet customers to cooperate with us. forged and casting valve body