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 
Ölbohrplattform

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

Available product forms

You will find a detailed list about available product forms and sizes of VDM® Alloy 825 (2.4858/N08825) in our data sheet. 

Do you have any questions? Please contact us!

VDM Metals Mitarbeiter
Winfried SterzlVice President Sales - Oil and Gas vCard
RouteVDM Metals International GmbHPlettenberger Str. 258791 Werdohl
Dr. Tatiana Hentrich
Dr. Tatiana HentrichVice President Sales - Metal Powder vCard
RouteVDM Metals International GmbHPlettenberger Straße 258791 Werdohl