20MnCr5
Data verified20MnCr5 is the European Mn-Cr carburizing steel for larger gears and shafts, with higher core strength than 16MnCr5.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.17–0.22 |
| Si | ≤0.40 |
| Mn | 1.10–1.40 |
| Cr | 1.00–1.30 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Case hardness (carburized) | 58–64 HRC |
| Core tensile | 800–1100 MPa |
| Density | 7.85 g/cm³ |
Heat treatment
Carburize 880–930 °C; quench 810–840 °C oil; temper 150–200 °C.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.7147 (20MnCr5) |
| aisi | 5120 (near) |
| gb | 20CrMnTi family (near) |
Compare side by side: 20MnCr5 vs 16MnCr5 · 20MnCr5 vs 8620
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Automotive gears, transmission shafts, larger case-hardened components.
Processing: Good machinability in annealed/normalized condition; standard carburizing practice.
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Ask for a quotationVisit NasteelSource: EN 10084 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.