About Alloy
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.
Product Form
● Bar/Forgings
Chemical Composition
| 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 | – | – | – |
Property
| Grade | Tensile Strength MPa | Yield Strength MPa | Elongation % |
| Alloy 840 | 83(572) | 35(241) | 40 |
Application
● Heating pipes, containers, baskets and chains used in sulfuric acid pickling plants.
● Sea water cooling heat exchanger, marine product pipeline system, acid gas environment pipeline.
● Heat exchanger, evaporator, washing, dip tube, etc. in phosphoric acid production.
● Air heat exchanger in petroleum refining.
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