Carbon composites are widely used as antifrictional materials, especially in the case of dry friction. They may differ greatly in composition. Thus, when using a polymer matrix, the structure of the carbon material may correspond to a finely disperse phase or to long or short carbon fibers. One type of composite consists of a carbon base that is shaped during high-temperature treatment, with subsequent steeping by metals. Obviously, the carrying capacity of the composite will vary greatly in accordance with their composition. A method of determining the permissible loads on the basis of the experimentally observed stabilization in the wear of industrial F4K15M5 carbon composite was proposed in [1]. In this approach, the wear resistance of the material is estimated on the basis of the variation in wear coefficient with variation in the combined load p v , which is the product of the pressure p and slip velocity v . Experimental data are approximated by a universal power law. In practice, however, the linear wear rate I h is usually employed to determine the wear resistance, although there is some spread in the I h values as a result of the p v variation under the influence of fluctuation in the actual contact area. As shown by further research, the spread in I h does not introduce significant error in estimating the carrying capacity on the basis of experimental data, since what is needed here is knowledge not of the absolute value of I h but of the range of loads corresponding to the stabilization region of I h [1]. The measurement results are verified by frictional tests of three composites differing in the content of carbon and polytetrafluoroethylene (PTFE), in order to determine and compare the ranges of working loads and determine the carrying capacity of these materials. The three materials considered are F4K15M5 composite, containing 80 vol % PTFE, 15 vol % finely disperse casting coke, and 5 vol % molybdenum disulfide (MoS 2 ) [2]; Sigma-3, containing 25 vol % PTFE and 70 vol % ground carbon fiber, with added chromium and iron; and PPG B83 graphitized material steeped with babbitt metal. All the materials are carbon composites, but they differ in their carbon content (15, 70, and ≈ 95 vol %, respectively) and PTFE content (80, 25, and 0%, respectively).