C37 K07 Brake Disc Rotor Brake Drum for Dfsk Dongfeng

1. Description of brake drum  LK0579   Test Certification ReportTest Report No. : PJ120201106Inspection Manufacturer : Qingdao Pujie Industry Co. Ltd Export SeriesBrake DrumTechnical RequirementSampling InspectionTest ResultDisqualificationResultnAcReAStrength of extention Rm,Mpa≥2201012340√Hardness,HBW180~240194Metallographic StructureGraphite SgapeA Shape≥90%101√0√Grapgite Length3~5 Level5 LevelPearlite Quantity≥95%≥95%Varbide Quantity1~2 Level1 LevelPhosphide Eutectic1~2 Level1 LevelChemical Component Analysis,%C3.3~3.71013.50√SI1.4~2.01.6Mn0.5~0.90.8P≤0.120.08S≤0.100.07BSurface QualityCasting Compent1. Washed by shot blasting machine                                2. No residual oxide , no residual sand, has no butt, casting fin or air buddle112√0√Brake DrumNo cold shut, no crack, no cinder pig, no pore and so on√Surface of brake drumNo grease dirt√Form and location toleranceSurface of friction cylinder radial full indicator movement,MM≤0.200.18Surface Roughness Ra,μmSurface of friction cylinder touch brake lining≤3.2