1.2891
1.2891 is the material number of the grade also listed as 34CrAlNi7. 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. 1.2891
- Category Nitriding steels · 11 grades
- Designations 2
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
5 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 |
|---|---|
0.35 | |
1.7 | |
0.2 | |
1 | |
1 |
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 | 0,35 | 0.350 | 0.350 | Exact |
| Al | 1 | 1.000 | 1.000 | Exact |
| Cr | 1,7 | 1.700 | 1.700 | Exact |
| Ni | 1 | 1.000 | 1.000 | Exact |
| Mo | 0,2 | 0.200 | 0.200 | Exact |
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: Mn, Si.
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.
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.