What are the materials of brake discs? Which one is more durable?

       The brake disc is a key component in the automotive braking system, and its material directly affects the braking performance and service life. Here are several common brake disc materials and their characteristics:
       1、 Common brake disc materials
       Grey cast iron brake disc
       Advantages: Low cost, good wear resistance, high thermal stability. Grey cast iron brake discs are currently the mainstream brake disc material on the market, suitable for most ordinary vehicles.
       Disadvantages: Large weight, relatively poor thermal conductivity, and easy rusting.
       Applicable scenarios: Suitable for daily driving and ordinary household cars.
       Alloy brake disc
       Advantages: Lightweight, good heat dissipation performance. Alloy brake discs are usually made of materials such as aluminum alloy or titanium alloy, which can effectively reduce vehicle weight and improve handling performance.
       Disadvantage: High cost.
       Applicable scenarios: Suitable for high-performance vehicles and models with lightweight requirements.
       Ceramic brake disc
       Advantages: Light weight, high temperature resistance, wear resistance, long service life. Ceramic brake discs have excellent thermal attenuation resistance at high temperatures and stable braking effects.
       Disadvantage: High cost.
       Applicable scenarios: Mainly used for high-performance sports cars and racing cars.
       Carbon fiber ceramic brake disc
       Advantages: light weight, high strength, high temperature resistance, and wear resistance. Carbon fiber ceramic brake discs can generate braking force in the early stages of braking, resulting in shorter braking distances.
       Disadvantages: The manufacturing process is complex and the cost is very high.
       Applicable scenarios: Mainly used for high-end sports cars.

       2、 Durability comparison
       Gray cast iron brake discs: Although gray cast iron brake discs are prone to rusting, they have good durability under normal use and maintenance, and are suitable for most ordinary vehicles.
       Alloy brake discs: Alloy brake discs have better wear resistance and heat resistance than gray cast iron brake discs, but they are more expensive.
       Ceramic brake discs: Ceramic brake discs perform well in terms of wear resistance and thermal degradation resistance, with a longer service life but higher prices.
       Carbon fiber ceramic brake discs: Carbon fiber ceramic brake discs have high durability and heat resistance, but due to their high cost, they are generally only used for high-end sports cars.
       3、 Choose Suggestions
       Daily driving: If mainly used for daily city driving, gray cast iron brake discs are a cost-effective choice.
       High performance requirements: For car owners who pursue high performance and lightweight, alloy brake discs or ceramic brake discs are better choices.
       Budget considerations: If the budget is limited, gray cast iron brake discs are an economical choice; If the budget is sufficient and the performance requirements are high, ceramic brake discs can be considered.
       In short, when choosing brake discs, one should decide based on their driving habits, vehicle usage, and budget. Brake discs made of different materials have their own advantages, suitable for different usage scenarios and needs.