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
- 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|
|Al||1,0 – 1,7||1,00 – 1,70|
D ≤ 100 mm
|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.