1.8521
1.8521 is the material number of the grade also listed as 15CrMoV5-9. It is a material in the category Nitriding steels. We list 2 designations recorded for this grade, in the standards DIN / EN and PN.
- Material no. 1.8521
- Category Nitriding steels · 11 grades
- Designations 2
If you came for one of these
The most-used names for this grade.About Nitriding steels
Nitriding steels are alloy steels designed for nitriding, a surface-hardening treatment that produces a hard, wear-resistant surface while retaining a tough supporting core. They are used for gears, shafts, dies and other components requiring resistance to wear, repeated loading and dimensional change in service.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Also known as
2 designations · 2 standards · nothing hiddenEvery designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
Chemical composition
8 elements on file · weight %What this alloy is
Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.
| Element | % by weight |
|---|---|
0.13–0.18 | |
≤ 0.4 | |
0.8–1.1 | |
0.025 | |
0.03 | |
1.2–1.5 | |
0.8–1.1 | |
0.2–0.3 |
The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other.
| Element | As publishedsource text, verbatim | Min% by weight | Max% by weight | Bound |
|---|---|---|---|---|
| C | 0,13-0,18 | 0.130 | 0.180 | Range |
| Si | ≤0,40 | — | 0.400 | Max |
| P | 0,025 | 0.025 | 0.025 | Exact |
| S | 0,03 | 0.030 | 0.030 | Exact |
| V | 0,20-0,30 | 0.200 | 0.300 | Range |
| Cr | 1,20-1,50 | 1.200 | 1.500 | Range |
| Mn | 0,80-1,10 | 0.800 | 1.100 | Range |
| Mo | 0,80-1,10 | 0.800 | 1.100 | Range |
The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred.
Predicted transformation temperatures
Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni.
Physical & mechanical properties
An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material.
Similar grades — and why
Selection rule, stated so you can disagree with it: same number class 1.8, a shared category, and a published range for Cr / Mn that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade.
Looking for this grade under another name?
Search the catalogue by designation, material number or composition — every name on this page is itself a way in.