The first material of which were made brake discs was gray iron that meets all requirements in terms of:
thermal conductivity, thermal diffusivity, corrosion resistance, durability in operation, low noise, stability friction, low wear, price
low cost. Over more than 100 years we have developed numerous materials that were created in order to improve brake
performance. However, many of these have proved to be ineffective, the only material which has been preserved to these days was
gray cast iron