Due to its superior properties, 42CrMo is used for highly stressed components:
Automotive: Crankshafts, camshafts, connecting rods, high-performance gears, drive shafts, axle beams, and steering components.
Aerospace: Aircraft landing gear components, engine mounts, and high-strength bolts/studs.
Oil & Gas: Drill collar subs, valve components, tool joints, and high-pressure fastener systems.
General Engineering & Machinery: Heavy-duty gears, sprockets, spindles, hydraulic rams, press rams, bolts (Grade 8.8, 10.9, 12.9), and high-strength shafts for turbines and pumps.
Tooling: Dies, molds for plastic injection (where wear resistance is needed), and machine tool components.