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 values for a reference section and heat-treatment condition. Actual properties vary with dimension and treatment, and are confirmed on the mill certificate.
Available forms.
Size: 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 and former DIN 31CrMoV9 are matching designations for the same steel across different standards (EN, AISI/SAE, JIS, GB, former DIN). They are near equivalents and may differ slightly in chemistry, so 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.