... for yacht Sand casting has four type process for choosing, green sand casting, resin sand casting, shell casting and lost foam casting, The difference focus on ... , AlSi12, AlSi10Mg,AlSi6Cu4 AlSi12Cu ),#Grey Iron( GG15,GG20,GG25.GG30 ), #Ductile Iron(GGG40,GGG50,GGG60,GGG70 ), #Vermicular iron, #Carbon Steel,alloy Steel#Copper ...