... .7147/5120/18KHG /20MnCr1 APPLICATIONS: Highly strssed parts, e.g., gears, crankshafts, switch components, etc. Alloyed case hardening steel for parts ... ² and good wearing resistance as boxes, piston bolts, spindles, camshafts, gears, shafts and other mechanical controlling parts. RELATED SPECIFICATIONS: Germany W ...