What Material is the Clutch Pressure Plate Made of?
2 Answers
The material of the clutch pressure plate is gray cast iron HT200, which has a pearlite structure in its metallographic organization, with a hardness ranging from HB170 to HB227. Additionally, a small amount of metal elements (such as nickel, iron, manganese alloy, etc.) can be added to enhance its mechanical strength. The clutch pressure plate is an important component of the clutch, playing a crucial role in the safety of vehicle operation. The clutch pressure plate is equipped with friction plates, similar to the brake pads on wheels, which are made of highly wear-resistant asbestos and copper wire. The friction plates on the pressure plate also have a specified minimum allowable thickness, and after long-term use, the friction plates on the pressure plate need to be replaced.
Clutch pressure plates are generally made of cast iron, particularly pearlitic cast iron or similar high-strength materials, which is quite common in automotive repairs. When I help people restore old cars, I often disassemble the clutch system. If the pressure plate material isn't heat-resistant, it can easily warp or wear out too quickly under high RPMs, leading to clutch slippage. The advantage of cast iron is its excellent heat dissipation, low cost, and ability to withstand repeated friction, extending service life. Sometimes, pressure plates are reinforced with steel components for added rigidity, which is more common in heavy-duty vehicles. Material selection directly affects clutch performance; low-quality pressure plates can cause shuddering or a burning smell. It's recommended to perform regular inspections and maintenance, replacing them with OEM or compatible parts when needed.
