| 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 |
Complaint
