China Az9112340006 Str HOWO Heavy Duty Truck Brake Drum, Find details about China Az9112340006 Brake Drum, Az9112340006 Truck Drum from Az9112340006 Str HOWO Heavy Duty Truck Brake Drum
Test Certification Report | |||||||||
Test Report No. : PJ1201206 | Inspection Manufacturer : Qingdao Pujie Industry Co. Ltd | ||||||||
Export Series | Brake Drum | Technical Requirement | Sampling Inspection | Test Result | Disqualification | Result | |||
n | Ac | Re | |||||||
A | Strength of extention Rm,Mpa | ≥220 | 1 | 0 | 1 | 234 | 0 | √ | |
Hardness,HBW | 180~240 | 194 | |||||||
Metallographic Structure | Graphite Sgape | A Shape≥90% | 1 | 0 | 1 | √ | 0 | √ | |
Grapgite Length | 3~5 Level | 5 Level | |||||||
Pearlite Quantity | ≥95% | ≥95% | |||||||
Varbide Quantity | 1~2 Level | 1 Level | |||||||
Phosphide Eutectic | 1~2 Level | 1 Level | |||||||
Chemical Component Analysis,% | C | 3.3~3.7 | 1 | 0 | 1 | 3.5 | 0 | √ | |
SI | 1.4~2.0 | 1.6 | |||||||
Mn | 0.5~0.9 | 0.8 | |||||||
P | ≤0.12 | 0.08 | |||||||
S | ≤0.10 | 0.07 | |||||||
B | Surface Quality | Casting Compent | 1. Washed by shot blasting machine 2. No residual oxide , no residual sand, has no butt, casting fin or air buddle | 1 | 1 | 2 | √ | 0 | √ |
Brake Drum | No cold shut, no crack, no cinder pig, no pore and so on | √ | |||||||
Surface of brake drum | No grease dirt | √ | |||||||
Form and location tolerance | Surface of friction cylinder radial full indicator movement,MM | ≤0.20 | 0.18 | ||||||
Surface Roughness Ra,μm | Surface of friction cylinder touch brake lining | ≤3.2 | <3.2 | ||||||
Position cylinder surface,set wheel hub | ≤3.2 | <3.2 | |||||||
Innner and out of drum disc connect place | ≤6.3 | <3.2 |