VDM-Metals | Alloy 825 CTP (2.4861/N08827)

VDM® Alloy 825 CTP (2.4861/N08827)

VDM® Alloy 825 CTP is a fully austenitic nickel-iron-chromium alloy with additions of copper and molybdenum. In contrast to the standard variant VDM® Alloy 825, the material has a higher proportion of molybdenum, which increases the pitting corrosion resistance in seawater.

Characteristics of VDM® Alloy 825 CTP

The acronym CTP stands for Corrosion - Temperature - Pressure and identifies material variants that are specially tailored to the requirements of the oil and gas industry.

The Pitting Resistance Equivalent Number (PREN) of the material is 42 (VDM® Alloy 825: 33).

VDM® Alloy 825 CTP (2.4861/N08827) is characterized by:

High resistance to chloride-induced stress corrosion
Good resistance to chloride-induced pitting and crevice corrosion
Good resistance to oxidizing and non-oxidizing hot acids

Applications of VDM® Alloy 825 CTP

VDM® Alloy 825 CTP is used in the oil and gas industry and in a wide variety of chemical processes. Typical application fields include:

Pipes, tubes and fittings in the oil and gas extraction, e. g. in heat exchangers, evaporators, washers, immersion pipes in sea water cooled heat exchangers, offshore piping, umbilicals
Offshore industry and seawater exposed equipment
Components in sulfuric acid pickling plants like heating coils, vessels, boilers, baskets and chains
Heat exchangers, evaporators, washers, immersion pipes in phosphoric acid production