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Polished brake disc for BMW

Products features are as follows:

1. Chemical Composition (Percent)
    * Total Carbon:             3.0 - 3.50%
    * Silicon:                  1.90 - 2.30%
    * Manganese:                0.60 - 0.90%
    * Phosphorus:               0.12% Max.
    * Sulfur:                   0.10% Max.

2. Microstructure:
    Graphite Structure: Predominantly type A, size 3-5.
    Matrix: Pearlistic with max.15 ferrite. Free from chill

3. Physical Properties
    Tensile Strength: Min. 200 N/mm
    Brinell Hardness: 180 ~ 240HB