GX40NiCrSiNb38-19
GX40NiCrSiNb38-19 is a designation in DIN / EN for the material held under material number 1.4849, also listed as GX40NiCrSiNb38-18. It is a material in the category Heat-resistant cast steels. We list 4 designations recorded for this grade, in the standards DIN / EN and UNS.
If you came for one of these
The most-used names for this grade.About Heat-resistant cast steels
Heat-resistant cast steels are cast ferrous alloys formulated for service at elevated temperatures, where resistance to softening and thermal degradation is important. They are used for furnace components, heat-treatment equipment and other high-temperature plant parts that require cast shapes and dependable mechanical performance during heating.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Also known as
4 designations · 2 standards · nothing hidden- GX40NiCrSiNb38-18This grade’s own nameWithdrawn
- GX40NiCrSiNb38-19This grade’s own name
Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
Chemical composition
9 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 |
|---|---|
0.3–0.5 | |
1–2.5 | |
≤ 2 | |
0.04 | |
0.03 | |
18–21 | |
≤ 0.5 | |
36–39 | |
1.2–1.8 |
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 | 0,30-0,50 | 0.300 | 0.500 | Range |
| Si | 1,00-2,50 | 1.000 | 2.500 | Range |
| P | 0,04 | 0.040 | 0.040 | Exact |
| S | 0,03 | 0.030 | 0.030 | Exact |
| Cr | 18,0-21,0 | 18.000 | 21.000 | Range |
| Mn | ≤2,00 | — | 2.000 | Max |
| Ni | 36,0-39,0 | 36.000 | 39.000 | Range |
| Nb | 1,20-1,80 | 1.200 | 1.800 | Range |
| Mo | ≤0,50 | — | 0.500 | Max |
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
This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here.
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 1.4, a shared category, and a published range for Ni / Cr 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.