20NiCrMoS6-4
1.6571Free-cutting variant of 20NiCrMo6-4 — S addition for improved machinability. NiCrMo case hardening steel with excellent core toughness and deep hardenability. Used for high-volume CNC production of automotive transmission gears, pinions, and shafts.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | 20NiCrMoS6-4 / 1.6571 | 1.6571 | 100% |
Sources: EN 10084
Mechanical properties — Pro
Case Hardened
| Property | Value | Unit |
|---|---|---|
| Hardness HRC |
QT Core
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elastic Modulus | ||
| Density |
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50CrV4
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51CrMoV4
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20MnCr5
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