Alloy 825

Alloy 825, also known as Incoloy 825, is a nickel-iron-chromium alloy with molybdenum and copper added. Alloy 825 has excellent resistance to both reducing and oxidizing acids, to stress-corrosion cracking and to pitting and crevice corrosion. Alloy 825 is especially resistant to sulfuric and phosphoric acids.

Alloy 825 is typically used in applications such as:

◆ Chemical processing
◆ Pollution-control equipment
◆ Oil and Gas well piping
◆ Nuclear fuel reprocessing
◆ Acid production and Pickling equipment

Material composition/Composition:
Ni Nickel ▏ 38.0%-46%
C Carbon ▏ 0.05% max.
Fe lron ▏ 22.0% min
Cr Chromium ▏ 19.5% -23.5%
AI Aluminum ▏ 0.2% max.
S Sulfur ▏ 0.3% max.
Ti Titanium ▏ 0.6% -1.2%
Mo Molybdenum ▏ 2.5% -3.5%
Cu Copper ▏ 1.5%-3.0%
Mn Manganese ▏ 1.0% max.
Si Silicon ▏ 0.5% max.
ASTM codes:
Pipe:B423 seamless / B705 welded
Fittings:B366
Flanges / Forgings:B564
Tube:B163 seamless / B704 welded

Plate:B424
Bar/Billet:B425
ASME Fittings:WPNICMC
Equivalents:
Trademark: Incoloy 825
UNS: N08825
Werkstoff nr. 2.4858

Products Available:
Seamless Tubes, Welded Pipes.