Shanghai Suyu Railway Material Co.,Ltd

Contact person: Linda Yuan

Tel: 0086-021-58999010

Mp: 008615901613885


skype: wysuyu1

Add: 1736 Room 15th Building 201 Jinxiang Road Pudong Shanghai China 201206

Composite Brake Block

Home » Products »Composite Brake Block

201806262221077501.jpg  2018062622210775011.jpg

1. Function
Our composite brake block is an ideal  replacement of the metallic (gray cast iron) brake block. Composite brake block features motion to the wheel and well fitness between the brake block and brake  block shoe (brake holder).

2. Physical and mechanical properties of composite

CharacteristicUnitValueTesting Method
Specific Gravitygr/cm31,7 – 2,4ASTM D792
Coefficient of Friction
0,14 – 0,22ASTM D1894
HardnessHRR70 – 105ASTM D785
Crush StrengthN/cm2Minimum 2500ASTM D695
Bending StrengthN/cm22400 – 4000ASTM D790
Tensile StrengthN/cm2480 – 1500ASTM D3039
Shear StrengthN/cm21500 - 3500ASTM D732
Heat Resistance: 250ºC
Result: Does not melt and burn for  continuous use.
≥ 400ºC
Result: May burn but does not cause the flame.

3. Operational heat
Our composite brake block won't melt or burn and continues to work at a temperature of 250℃
It may burn but causes no flame at a temperature of ≥ 400℃.

4. Materials
A. The materials of composite brake block consist of 3 main substances including reinforcing fiber, organic/inorganic  filler and resin bound.
B. It has a high level of uniformity.
C. It can be separated from the backing plate.
D. It contains no asbestos, lead, zinc or  other mixtures.
E. It also contains no toxic materials.
F. The hardness of  the material is lower than the wheel's.
G. It causes no strong smell in  friction.

5. Backing plate
Backing plate for a trains' composite brake block must meet the following criteria. Firstly, it is made of ST-41 steel plate, and is constructed to transmit the braking force to the composite material. Secondly, there should be a binding structure between the composite  material and backing plate, thus forming into a integrated unit and ensuring sufficient bending strength and stiffness.

6. Performance
A. Excessive wear won't be caused on the  surface of the wheel and the composite brake block.
B. The composite brake  block will not cause the wheel porous or cracked.
C. It won't stick at the  wheel during braking therefore won't cause uneven wheel surface.
D. It won't  cause wheel slipping during full braking in wet conditions.

7. Test procedure
A. Vernier caliper or other methods are used to test the dimension of the brake block.
B. Laboratory test
Specific gravity test: standard ASTM D 792 or equivalent method
Coefficient of friction test: Standard ASTM D 1894 or equivalent method
Hardness test: standard ASTM D 785 or equivalent method
Shear resistance test: standard ASTM  D 732 or equivalent method
Press test: Standard ASTM D 695 or equivalent method
Bending test: Standard ASTM D 790 or equivalent method
Thermal  properties test: standard ASTM D 177 or equivalent method

composite-iron-brake-block_03b  composite-iron-brake-block_06b

composite-iron-brake-block_07b  composite-iron-brake-block_08b

composite-iron-brake-block_04b   composite-iron-brake-block_09b

composite-iron-brake-block_10b   composite-iron-brake-block_05b

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