17Cr3
1.7016Chrome case-hardening steel — the simplest Cr-alloyed carburizing grade in EN 10084. 0.7-1.0% Cr gives better hardenability and wear resistance than unalloyed C20 but less than 16MnCr5. Used for smaller gears, camshafts, spindles, pins, and bushings with medium wear requirements. ≈ SAE 5117.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | SAE | USA | SAE 5117 | — | REF |
| 🇪🇺 | EN | Europe | 17Cr3 / 17CrS3 | 1.7016 / 1.7014 | 100% |
| 🇫🇷 | AFNOR | France | 18C3 | — | 95% |
Sources: SAE J404, EN 10084:2008, AFNOR
Mechanical properties
Compatibility verdict
17Cr3 and 18C3: 95% 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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