In the last several years, the NFJ Foamy Fiber (porous strengthening material) has been a novel material used in the polymer based-friction materials. With the development of high speed and heavy railway vehicles, and the requirement of environment protection, it is demanded that the friction materials should provide some new properties. It is widely recognized that the next generation friction materials should be light-weight, porous, elastic, low density, have rough surface, decrease the dosage of polymers, including rubber and resin used as binders in the friction materials. This will reinforce the mechanical and friction properties of the braking components, reduce the noise and increase the vehicle comfort. The enhanced binding strength of inorganic materials can reduce the addition of nonferrous metals, which will prevent their harm to the human beings. In recent years, the developed countries have set up the policy that the nonferrous metals are forbidden to be used in friction materials due to the fact that the dust induced during the wear of friction materials can do harm to human beings, and contaminate water once it enters into the earth. Our company has developed foamy fiber, which is a porous strengthening material. It is mainly made of iron together with carbon less than 0.02 wt.%. Fe is an element beneficial to the human beings. The NFJ foamy fiber, which is produced through special technique, is loose, porous, plastic, low density and with rough surface and resistant to rust. It has been widely used in the friction materials for railway and automobiles.