Brake drum (1)Metetrial:gray ironHT250/GG25(2)Weight:20kg85kg(3)Chemicalcomposition: C:3.0-3.3%Si:1.6-1.9%Mn:0.7-0.9% P:<0.12%S:<0.12% (4)Mechanicsperformance:Mainbodydegreeofhardness:163-255HBS Testingrodtensilestrength:>=220Mpa(5)Design Asperthecustomersdrawings Asperthecustomerssample6)PackingWoodpallet&WaterproofmembraneAsperthecustomersrequirements(7)ISOavailable