Chemical Composition | Cr | Ni | Mo | Cu | Cb+Ta | Al | Ti | C | Fe | Co | Mn | Si | P | S | B |
% Values (minimum) | 19.5 | 38 | 2.5 | 1.5 | - | 0.6 | - | - | - | - | - | ||||
% Values (maximum) | 23.5 | 46 | 3.5 | 3 | 0.2 | 1.2 | 0.05 | bal | 1 | 0.5 | 0.02 | 0.01 |
APPLICATION
- Fuel element dissolvers
- Sea-water-cooled heat exchangers
- Offshore product piping systems
- Tubes and components in sour gas service
- Heat exchangers
- Evaporators
- Scrubbers
- Air-cooled heat exchangers in petroleum refineries
- Chemical and Food Processing
DESCRIPTION
Alloy 825 is a high performing nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. The nickel content is sufficient for resistance to chloride-ion stress-corrosion cracking. This has been successfully used in oil & gas, chemical processing and power generation markets.
CORROSION RESISTANCE
The outstanding attribute of Alloy 825 is its high level of corrosion resistance. In both reducing and oxidize environments, the alloy resists general corrosion, pitting, crevice corrosion, inter-granular corrosion, and stress-corrosion cracking. Some environments in which Alloy 825 is particularly useful are sulphuric acid, phosphoric acid, sulphur containing flue gases, sour gas and oil wells, and sea water.