Properties desired for brake rotors and drums

•  Design was follow OE specifications (dimensions and configuration).

•  Rotor was have a smooth non-directional surface finish

•  Rotors and drums was have engraved on them this information: brand , part number , minimum thickness, date of manufacturing (YYMMDD) and “Made in PRC”.

•  Brake rotors and drums was made of Gray cast iron SAE Grade G9 (old G2500) or G10 (old G3000) according to SAE J431 and should comply with these specifications:

1.- Chemical composition:

Element                 Content (%)

Carbon:                  3,00 - 3,70

Silicon:           1,30 - 2,80

Manganese:         0,9 maximum

Phosphorus:        0,20 maximum

Sulfur:           0,15 maximum