Nitriding Steel
31CrMoV9 · 1.8519
Also known as former DIN 31CrMoV9
Chromium-molybdenum-vanadium nitriding steel for hard-wearing surfaces.
31CrMoV9 (material 1.8519) is a chromium-molybdenum-vanadium nitriding steel that develops a very hard, wear-resistant nitrided surface over a tough quenched-and-tempered core. Used for gears, spindles, shafts and components requiring high surface hardness with dimensional stability.
International equivalents.
The same steel by country and standard — near matches; mill certificate governs.
Chemical composition.
Indicative, % by weight per EN 10085. Mill certificate governs.
| Element | % |
|---|---|
| C | 0.27 – 0.34 |
| Si | ≤ 0.40 |
| Mn | 0.40 – 0.70 |
| Cr | 2.30 – 2.70 |
| Mo | 0.15 – 0.25 |
| V | 0.10 – 0.20 |
Mechanical properties.
Indicative; depends on dimension and heat treatment.
Available forms.
Size range: Ø 16 – 400 mm
Typical applications.
- Nitrided gears
- Spindles & shafts
- Extruder screws
- Wear-resistant parts
FAQ.
What is 31CrMoV9?
31CrMoV9 (material 1.8519) is a chromium-molybdenum-vanadium nitriding steel that develops a very hard, wear-resistant nitrided surface over a tough quenched-and-tempered core. Used for gears, spindles, shafts and components requiring high surface hardness with dimensional stability.
Is 31CrMoV9 the same as former DIN 31CrMoV9?
Yes — 31CrMoV9 is the European (EN) designation, while former DIN 31CrMoV9 are the matching names used in other countries and standards (for example AISI/SAE in the USA, JIS in Japan, GB in China, former DIN in Germany). They are near equivalents and may differ slightly in chemistry; the mill certificate governs the exact specification.
What are the international equivalents of 31CrMoV9?
31CrMoV9 corresponds to 31CrMoV9 (1.8519) (EN), 31CrMoV9 (former DIN). Equivalents are nearest matches by country/standard; the mill certificate governs the exact specification.
In which forms is 31CrMoV9 available?
31CrMoV9 is supplied as Round bar, Bright / cold-drawn bar, Forged, in Ø 16 – 400 mm.
What is 31CrMoV9 used for?
Typical applications include Nitrided gears, Spindles & shafts, Extruder screws, Wear-resistant parts.