... test,Chemical composition test. 5.Quality Assurance Cast iron part accessoryAdvantage: 1. We can make it ... & Check 9. Assembly10. Trial Production11. Correction Cast iron part accessory1. Molding process:Green sand casting,shell sand ... Manufacturer certification:ISO9001:2008About ProductsMaterial:Ductile iron,gray iron,steel,stainless steel,alloy steel,aluminum. ... control on quality.Test Cast iron