20CrMoS5
1.7264Free-cutting CrMo case hardening steel — S addition to 20CrMo5 base for CNC machining. Higher Cr (1.1-1.4%) and Mo (0.20-0.30%) than 16MnCrS5 = deeper hardenability for medium-large gears. Used for automotive transmission gears, pinions, and differential components on CNC automatics.
Mechanical properties
Related materials
42CrMo4
1.7225High-strength quenched and tempered chromium-molybdenum steel. Widely used for shafts, gears, crankshafts, connecting rods, and high-strength bolts. Excellent hardenability and good fatigue resistance.
34CrNiMo6
1.6582High-strength quenched and tempered Cr-Ni-Mo steel. Excellent hardenability and toughness, suitable for large cross-sections. Used for heavy-duty shafts, gears, turbine parts, and aerospace components.
16MnCr5
1.7131Low-carbon case-hardening steel with manganese and chromium. Excellent for carburizing to produce a hard, wear-resistant surface with a tough core. Standard choice for gears, camshafts, piston pins, and transmission components.
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