Alloy 601
2.4851 – N06601
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Material description
The material 2.4851 is a nickel-chromium-iron alloy that also contains small amounts of aluminium. Thanks to the high chromium content in combination with the alloyed aluminium, a very resistant oxide layer is formed at high temperatures – thus ensuring very good resistance to oxidation and carburisation. In addition, 2.4851 (Alloy 601) offers good resistance to stress corrosion cracking under carburising conditions and in oxidising/sulphurous atmospheres.
The material also has good mechanical properties at room temperature and at higher temperatures due to solid solution hardening.
AN OVERVIEW OF THE PROPERTIES OF 2.4851:
- Excellent resistance to oxidation and carburisation (even at high temperatures)
- Good resistance, among other things: under carburising conditions, against stress corrosion cracking, in oxidising/sulphurous environments
- Good mechanical properties
Applications
- Oven construction
- Chemical industry
- Environmental protection technology
- Power plants
Chemical composition in %
| ASTM B166 | DIN 17742 | |
|---|---|---|
| Ni | 58,0 – 63,0 | 58,0 – 63,0 |
| Cr | 21,0 – 25,0 | 21,0 – 25,0 |
| Fe | Rest | 18,0 max. |
| Mn, max. | 1,0 | 1,00 |
| Al | 1,0 – 1,7 | 1,00 – 1,70 |
| C, max. | 0,10 | 0,10 |
| Cu, max. | 1,0 | 0,50 |
| Si, max. | 0,5 | 0,50 |
| S, max. | 0,015 | 0,015 |
| B, max. | 0,006 | |
| P, max. | 0,020 | |
| Ti, max. | 0,50 |
Mechanical properties
| Solution annealed | Bar | Bar D ≤ 100 mm DIN 17752 |
|---|---|---|
| Rm (MPa) | ≥ 550 | ≥ 550 |
| Rp 0,2 (MPa) | ≥ 205 | ≥ 205 |
| Rp 1,0 (MPa) | ≥ 235 | |
| A (%) | ≥ 30 | ≥ 30 |
| Hardness (HBW 2,5/62,5) | max. 220 |
The specified values are non-binding guide values.