25CrMo4
1.7218Medium-carbon chromium-molybdenum steel with good toughness and weldability. Used for seamless tubes, pressure vessels, aircraft structural parts, and automotive components. Better weldability than 42CrMo4 due to lower carbon.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 4130 | G41300 | REF |
| 🇪🇺 | EN | Europe | 25CrMo4 | 1.7218 | 100% |
| 🇫🇷 | AFNOR | France | 25CD4 | — | 98% |
| 🇨🇳 | GB | China | 25CrMo | — | 95% |
| 🇯🇵 | JIS | Japan | SCM430 | — | 93% |
Sources: ASTM A29, EN 10083-3:2006, NF EN 10083-3, GB/T 3077, JIS G4105
Mechanical properties
Compatibility verdict
25CrMo4 and 25CD4: 98% composition match
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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