Alloy 825 (UNS N08825/W.Nr. 2.4858) is a nickel-iron-chromium alloy with additions of copper, molybdenum and titanium. The chief characteristic of Alloy 825 tubing is its corrosion resistance; the alloy was designed with a specific chemical composition that provides exceptional resistance to many corrosive environments such as sulfuric acid, phosphoric acid, sulfur containing flue gases, sour gas and oil wells, and sea water.
The nickel content in Alloy 825 provides resistance to chloride-ion stress corrosion cracking. The nickel, in conjunction with the molybdenum and copper, also gives Alloy 825 tubing great resistance to reducing environments, like those containing sulfuric and phosphoric acids. Aiding resistance to pitting and crevice corrosion is one of the chief benefits of the molybdenum. Resistance to a variety of oxidizing substances such as nitric acid, nitrates, and oxidizing salts comes from the chromium content. Titanium, often with heat treatment, serves to stabilize the alloy against sensitization to inter granular corrosion.
Fe 22% min
Mn 1% max
|Material||OD (inch)||Wall Thickness (inch)||Working Pressure (MPa)||Length (M/Pcs)|
|Inconel 825||1/8”, 1/4'', 3/8'', 1/2''||0.025”, 0.035”, 0.049”, 0.065''||60--120||50--4000|
|Note: The specification and length per coil can be customized according to customer’s requirements.|
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