C. R. (American Brake Shoe Co.) ... Sensitivity is due to C content, and decarburization near 2000AdF. may be more serious than metal loss by scaling. ... recrystallization at some of the aging temperatures, are shown to exert considerable influence on the locations and shapes of time- hardness diagrams at various temperatures. ... 1, 1947 All compression rings in the American Hammered piston ring line will be made of F-88 ... Cherry 4700 CLEVELAND 14 Williams and Company, Inc. .