Understand the relevant dynamics of car brake discs

Do you know what the logo on the brake drum is? Today, let me briefly explain to you:

The lettering on the brake drum: represents the brand identification, material number, brand number, supporting vehicle brand, brake system brand, original part number, production factory, time, and batch of the brake pads. The common E represents a friction coefficient between 0.25 and 0.35, F is mentioned above, and G represents a friction coefficient between 0.45 and 0.55. 1112 degrees Fahrenheit is approximately 600 degrees Celsius. High temperature plates allow the original friction coefficient to be maintained at higher temperatures, so high temperature plates may not necessarily be sensitive, but many high temperature plates also help achieve higher temperatures by increasing the friction coefficient. The ordinary semi metal brake pads we often refer to are of this EF grade. Many Japanese and Korean models are in the EF class. So the braking effect in the first segment is not obvious, and you need to continue pressing the brake pedal to have a significant braking effect. The line sensitivity is not very good. A good brake pad has a specified friction coefficient of 0.45 (usually around 0.35), and the new generation ceramic material of TD2C can withstand high temperatures up to 800 degrees Celsius. The GG grade brake pad is higher than the general FF grade. The service life of brake pads is also much longer, and there is relatively little wear on the brake discs, and almost no black powder is generated. TD2C is the friction material code. Can you see if it is GG grade, and ceramic brake pads do not contain iron inside, only copper (which is definitely less wear on the brake discs)? In the long run, due to the high friction coefficient of ceramic brake pads, the brake pedal force required is small, which can reduce the hydraulic pressure inside the entire brake system, This can extend the brake master cylinder.