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42CrMoS4

1.7227
alloy_steelcr_mo
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Free-cutting variant of 42CrMo4 with controlled sulfur content (0.020-0.040%). Improved machinability while maintaining essentially the same mechanical properties. Used for high-volume CNC machined components: gears, shafts, bolts, and automotive parts.

International equivalents

FlagStandardCountryGradeNumberMatch
🇺🇸AISIUSAAISI 4140 (S-version)—REF
🇪🇺ENEurope42CrMoS41.7227100%
🇪🇺ENEurope42CrMo4 (base grade)1.722595%

Sources: ASTM A29, EN 10083-3:2006, EN 10083-3

Chemical composition comparison (wt%)

Side-by-side: 42CrMoS4 (EN 10083-3) vs 42CrMo4 (base grade) (EN) (EN 10083-3:2006)

Element42CrMoS4 (EN 10083-3)42CrMo4 (base grade) (EN)Overlap
C—0.38–0.45%—
Si—0–0.4%—

Mechanical properties

Compatibility verdict

42CrMoS4 and 42CrMo4 (base grade): 95% composition match

Related materials

42CrMo4

1.7225
cr_mo

High-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.

🇪🇺 42CrMo4🇫🇷 42CD4🇬🇧 708M40 / EN19🇯🇵 SCM440

34CrNiMo6

1.6582
cr_ni_mo

High-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.

🇪🇺 34CrNiMo6🇨🇳 34CrNiMo6🇬🇧 817M40 / EN24🇯🇵 SNCM439

16MnCr5

1.7131
case_hardening

Low-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.

🇪🇺 16MnCr5🇫🇷 16MC5🇨🇳 16MnCr5🇯🇵 SCr415
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