Metallic Vs. Non-Metallic Brake Pads

Metallic brake pads are more cost-efficient than non-metallic pads.

There are no federal regulations concerning after-market brake pads, so it is important for consumers to understand the choices available to them and how they affect brake performance.

Metallic Break Pad Composition

There are two types of metallic break pads. Semi-metallic pads contain a metallic compound consisting of anything from chopped wool or wire to iron powder or copper, and are mixed with other inorganic fillers. Semi-metallic brake pads have a metal content ranging from 30 percent to 65 percent. Low-metallic, non-asbestos organic (NAO) pads are made from organic materials and consist of 10 percent to 30 percent copper or steel.

Non-Metallic Brake Pad Composition

Non-metallic brake pads are often referred to as ceramic brake pads. However, because ceramic is a carcinogen, only small amounts of ceramic particles, not fibers, are used as an additive. Non-metallic brake pads consist primarily of Kevlar or Twaron.

Metallic Vs. Non-Metallic

Semi-metallic and low-metallic NAO break pads have excellent heat transfer rates and are considered more durable. Semi-metallic pads have a tendency to wear down rotors faster and do not perform at optimum levels in low temperatures. Low-metallic NAO brake pads are noisier and create more brake dust. Non-metallic brake pads are cleaner and quieter. They are also softer, which means less friction to the rotor, but more dust deposited on the wheels. Non-metallic brake pads cost more and wear down faster than metallic brake pads.

References

• ConsumerReports.com: Brake Pads: What to Look For