Incoloy 840
Description:
Nickel-based super alloy Incoloy 840 (Alloy 840/UNS S33400): Incoloy 840 nickel-based alloy: The Cr content in Incoloy 840 nickel-based alloy alloy is usually 18-20%, and the nickel content is 19-21%. Incoloy 840 alloy is a kind of austenitic stainless steel containing titanium and aluminum. It contains enough chromium to form and maintain a sufficient scale of chromium oxide to protect it under high temperature conditions and is more resistant to high temperatures than traditional chromium-nickel stainless steels such as 304; The higher nickel content makes it have better oxidation resistance than the standard 18-8 stainless steel, and its oxidation resistance is not inferior to higher-grade alloys whose service temperature is as high as 1900°F (1038°C) . Therefore, Incoloy 840 alloy is an ideal material for manufacturing electric heating pipes, automobile emission control systems and other high temperature resistant products.
Chemical composition % of Nickel-based super alloy: Incoloy 840 (Alloy 840/UNS S33400):
|
C≤ |
Si≤ |
Mn≤ |
P≤ |
S≤ |
Cr≥ |
Ni≥ |
Mo≥ |
Cu≤ |
|
0.08 |
1.00 |
1.00 |
0.040 |
0.030 |
18.0-20.0 |
19.0-21.0 |
– |
– |
|
Other |
N≤ |
Al≤ |
Ti≤ |
Fe≤ |
Co≤ |
V≤ |
W≤ |
Nb≤ |
|
– |
– |
0.15-0.60 |
Margin |
– |
– |
– |
|
Mechanical Properties:
|
Grade |
Tensile Strength MPa |
Yield Strength MPa |
Elongation % |
|
Alloy 840 |
83(572) |
35(241) |
40 |
Applications:
l Heating pipes, containers, baskets and chains used in sulfuric acid pickling plants.
l Sea water cooling heat exchanger, marine product pipeline system, acid gas environment pipeline.
l Heat exchanger, evaporator, washing, dip tube, etc. in phosphoric acid production.
Air heat exchanger in petroleum refining