30CrNiMo8
1.6580High-strength quenched and tempered Cr-Ni-Mo steel for very large cross-sections. Even better hardenability than 34CrNiMo6 due to higher Cr and Ni content. Used for large shafts (>200mm diameter), heavy-duty gears, turbine rotors, and critical aerospace components.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 4340 | G43400 | REF |
| 🇪🇺 | EN | Europe | 30CrNiMo8 | 1.6580 | 100% |
| 🇫🇷 | AFNOR | France | 30CND8 | — | 97% |
| 🇬🇧 | BS | United Kingdom | 823M30 | — | 93% |
Sources: ASTM A29, EN 10083-3:2006, NF EN 10083-3, BS 970
Mechanical properties
Compatibility verdict
30CrNiMo8 and 30CND8: 97% 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.
Export this comparison as PDF
Professional datasheet with equivalents, composition, and properties. Ready for your QM documentation.
Download PDF — €4.90Included with PRO subscription