Customization: | Available |
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Type: | Brake Drums |
Material: | Iron |
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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 |