Alloy 825

Alloy 825 is a titanium-stabilized fully austenitic Ni-Fe-Cr with additions of copper and molybdenum

Alloy 825 is characterized by:

  • Good resistance to stress-corrosion cracking
  • Satisfactory resistance to pitting and crevice corrosion
  • Good resistance to oxidizing and non-oxidizing hot acids
  • Good mechanical properties at both room and elevated temperatures, up to approximately 550°C (1020°F)

Nickel Alloy 825

What is Nickel Alloy 825

Nickel Alloy 825, also known as Incoloy ® 825, is a nickel-iron-chromium alloy that contains small amounts of titanium, copper, and molybdenum. This combination gives 825 Alloy the characteristics to withstand severe environments without severely corroding.

Nickel is a very versatile transition metal, with the characteristic tendency to show variable valency and form coordination compounds. It is popularized by the fact that it is offers electrical resistance, corrosion resistance, and resistance to high-temperature.

Industries that use nickel include aerospace, chemical processing, transportation, and power generation. These industries rely on nickel for its strength, among other values.

Alloy 825 offers its users some excellent additional benefits, including:

  • superior resistance to reducing acids and oxidizing acids, including very good resistance to sulfuric acid and phosphoric acid.
  • a very high level of resistance to different kinds of oxidizing substances, including but by no means limited to oxidizing salt, nitric acid and nitrates.
  • stopping localized attacks – these might come in the form of pitting or perhaps crevice corrosion
  • aiding in the prevention of cracking due to stress-corrosion.

It is the toughness and strength and these particular qualities of Incoloy® 825 that make it so popular for use in the following applications and industries (among others).

  • Marine exhaust systems
  • The handling of radioactive waste
  • Processing nuclear fuel
  • Pickling tank heaters, tanks, and equipment
  • The production of acid
  • Hot vessels for seawater, food, and water
  • Recovery of oil and gas
  • Chemical processing
  • Calorifiers
  • Pollution control 

All Inconel’s are mostly nickel and have chromium as the second element. Like other Inconel super alloys, Alloy 825 stands up well to pressure, kinetic energy, and heat. When heated, it will form a stable, thick, passivating oxide layer. This layer has the effect of protecting the surface from further damage.

Inconel maintains its strength well over a wide range of temperatures. This makes it particularly attractive to industries that would like to use aluminum and steel if it wasn’t for the fact that they would succumb to creep as a consequence of thermally-induced crystal vacancies.

The strength of the Inconel family, first developed in the 1940s, comes by process of precipitation hardening or solid solution strengthening. The chemical composition of Incoloy® 825 is unique. Industries choose it, therefore, due it’s very particular characteristics.

Alloy 825’s chemical composition is as follows:

Ni 38-46%

Fe 22% min

Cr 19-23.5%

Mo 2.5-3.5%

Cu 1.5-3%

Mn 1% max

Ti 0.6-1.2%

With so many varied applications for the use of Nickel Alloy 825, it’s good to know that you can get it the way you want it. We can provide your 825 Alloy in an array of shapes and sizes. This means that you can receive your metal order and put it to use without delay, without any need for modification or adjustment.

825 Pipe, Plate, & More

We can provide 825 Alloy as piping, tubing, sheets, strips, round bar or flat bar, plate, forging stock, hexagon, and wire. Regardless of the form in which you would like your Nickel 825, we see to it that it conforms to the critical industrial standards, including those from organizations such as ISO, ASTM, ASME, SEW, BS, DIN, and EN.

Nickel Alloy 825 is similar to Alloy 800, but you will find that it has improved resistance to aqueous corrosion. It also has good mechanical properties at cryogenic temperatures, at room temperature, and elevated temperatures, all the way to about 1000 degrees Fahrenheit.  Using this metal at above 1000 degrees Fahrenheit, however, can lead to some microstructural changes. It is possible that these changes might significantly reduce its impact strength and its ductility.

It also has permission for pressure-vessel use at wall temperatures reaching 800 degrees Fahrenheit but should not be used at temperatures where design factors include creep-rupture properties.

Why Metals 28

We strive to deliver our high-quality materials on time and with the quality you need. And our processing capabilities include waterjet and laser. Whatever your needs for Nickel Alloy 825, we have got you covered.

For more information about the range of ways in which we can deliver your metal, get in touch with our team. We will be glad to answer your questions regarding this incredible nickel and look forward to meeting your particular requirements with skill and efficiency.

We work hard to avoid defects, using statistical process control, variability reduction, error proofing and visual controls to see that you receive the best quality material in the best condition every time.

For more information, a quote, or to place an order, call us at 708-375-5617 (US) or 44-1254-956882 (UK) or use our easy-to-use online form. Our dedicated, professional, and knowledgeable team is waiting for your call.