1.4909
1.4909 is the material number of the grade also listed as X2CrNiMoN17-12-2. It is a material in the category High-temperature steels. We list 5 designations recorded for this grade, in the standards DIN / EN, UNS, AFNOR, JIS and GB.
- Material no. 1.4909
- Category High-temperature steels · 40 grades
- Designations 5
If you came for one of these
The most-used names for this grade.About High-temperature steels
High-temperature steels are steels designed to retain useful strength and structural stability during exposure to elevated temperatures. Their alloying systems provide resistance to oxidation, creep and loss of mechanical properties during prolonged heating, making them suitable for furnace components, heat exchangers, boilers and other hot-service equipment.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Also known as
5 designations · 5 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
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 |
|---|---|
0.015–0.03 | |
≤ 1 | |
1.6–2 | |
0.035 | |
0.02 | |
17–18 | |
2.2–2.8 | |
11–13 | |
≤ 0.25 | |
≤ 0.5 | |
0.05–0.1 | |
≤ 0.002 |
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 | ≤0,002 | — | 0.002 | Max |
| C | 0,015-0,030 | 0.015 | 0.030 | Range |
| N | 0,05-0,10 | 0.050 | 0.100 | Range |
| Si | ≤1,00 | — | 1.000 | Max |
| P | 0,035 | 0.035 | 0.035 | Exact |
| S | 0,02 | 0.020 | 0.020 | Exact |
| Cr | 17,0-18,0 | 17.000 | 18.000 | Range |
| Mn | 1,60-2,00 | 1.600 | 2.000 | Range |
| Co | ≤0,25 | — | 0.250 | Max |
| Ni | 11,0-13,0 | 11.000 | 13.000 | Range |
| Cu | ≤0,50 | — | 0.500 | Max |
| Mo | 2,20-2,80 | 2.200 | 2.800 | 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
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.
Heat treatment
Supply condition
- Solution annealingd≤180
Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied.
Source: www.caishuku.com
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 Cr / Ni 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.
Cr 16,0-18,0 · Ni 12,0-14,0
- ΔCr 0.50
- ΔNi 1.00
- 2 designations
Cr 17,0-19,0 · Ni 9,00-13,0
- ΔCr 0.50
- ΔNi 1.00
- 3 designations
Cr 17,0-19,0 · Ni 9,00-12,0
- ΔCr 0.50
- ΔNi 1.50
- 5 designations
Cr 17,0-19,0 · Ni 9,50-11,5
- ΔCr 0.50
- ΔNi 1.50
- 2 designations
Cr 15,0-17,0 · Ni 12,0-14,0
- ΔCr 1.50
- ΔNi 1.00
- 16 designations
Cr 15,5-17,5 · Ni 12,5-14,5
- ΔCr 1.00
- ΔNi 1.50
- 2 designations
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.