33MnCrB5-2
1.7185Boron-alloyed case hardening steel with higher C (0.30-0.36%) than typical case-hardening grades. B addition for cost-effective hardenability. After carburizing: HRC 58-62 surface with tough core. THE chain link and chain pin steel — also used for agricultural equipment, earth-moving parts, and wear-resistant components requiring surface hardness with impact resistance.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | 33MnCrB5-2 / 1.7185 | 1.7185 | 100% |
Sources: EN 10084
Chemical composition comparison (wt%)
Side-by-side: 33MnCrB5-2 (EN 10084) vs 33MnCrB5-2 / 1.7185 (EN) (EN 10084)
| Element | 33MnCrB5-2 (EN 10084) | 33MnCrB5-2 / 1.7185 (EN) | Overlap |
|---|---|---|---|
| C | — | 0.3–0.36% | — |
| Si | — | 0–0.4% | — |
Mechanical properties
Compatibility verdict
33MnCrB5-2 and 33MnCrB5-2 / 1.7185: 100% 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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