This is a high carbon martensitic stainless with moderate corrosion resistance, good strength and the ability to obtain and keep excellent hardness (HRC 60), and wear resistance.
AISI: 440C
EN: 1.4125
not recommended for temperatures above 400 °C
Ball bearings and races, gage blocks, molds and dies, cutlery, valve components, knives, measuring instruments.
| Brand name | Ravne | Mat. No. | DIN | EN | UNS |
| SINOXX 4125 | PK348 | 1.4125 | - | X105CrMo17 | 440C |
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 1.08 | max 1.0 | max 1.0 | 17.0 | 0.60 | - | - | - | - |
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