NiFe25Cr20NbTi
NiFe25Cr20NbTi is a material in the category Valve steels, held under material number 2.4955. Its recorded composition includes C 0.04–0.1%, Ti 1–2%, Cr 18–21%, Fe 23–28% and Nb 1–2%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HRC 28. Its recorded density is 7.85 g/cm³.
- Material no. 2.4955
- Category Valve steels · 14 grades
- Designations 1
About Valve steels
Valve steels are alloy steels developed for valve components exposed to heat, pressure, wear, and corrosive service conditions. They are characterised by combinations of strength, hardness, toughness, and resistance to oxidation or corrosion suited to the operating environment. Typical uses include engine valves and industrial valve parts where reliable performance and dimensional stability are required.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Chemical composition
12 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 |
|---|---|
0.04–0.1 | |
≤ 1 | |
≤ 1 | |
0.03 | |
0.015 | |
18–21 | |
Balance | |
0.3–1 | |
1–2 | |
1–2 | |
≤ 0.008 | |
23–28 |
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 |
|---|---|---|---|---|
| B | ≤0,008 | — | 0.008 | Max |
| C | 0,04-0,10 | 0.040 | 0.100 | Range |
| Al | 0,30-1,00 | 0.300 | 1.000 | Range |
| Si | ≤1,00 | — | 1.000 | Max |
| P | 0,03 | 0.030 | 0.030 | Exact |
| S | 0,015 | 0.015 | 0.015 | Exact |
| Ti | 1,00-2,00 | 1.000 | 2.000 | Range |
| Cr | 18,0-21,0 | 18.000 | 21.000 | Range |
| Mn | ≤1,00 | — | 1.000 | Max |
| Fe | 23,0-28,0 | 23.000 | 28.000 | Range |
| Ni | Rest/Bal. | 43.847 | 56.615 | Balance |
| Nb | 1,00-2,00 | 1.000 | 2.000 | 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, Mo.
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.
Properties by condition
1 conditions · 1 valuessteelnumber| Delivery state | HRC |
|---|---|
| Solution annealed | 28 |
Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ.
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