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825

Nickel Alloy 825 is a high-performance nickel-iron-chromium-molybdenum-copper alloy with excellent resistance to corrosion, pitting, and crevice corrosion in harsh environments.

Nickel Alloy 825, also known as Inconel 825, is a high-performance nickel-iron-chromium-molybdenum-copper alloy that offers excellent resistance to a wide range of corrosive environments. It is particularly effective in resisting pitting and crevice corrosion, making it an ideal choice for use in harsh environments such as chemical processing, oil and gas production, marine environments, and nuclear power plants.

The high nickel and molybdenum content of Nickel Alloy 825 give it excellent corrosion resistance, while the addition of chromium provides improved resistance to pitting and crevice corrosion. The copper content gives the alloy improved resistance to reducing acids, such as sulfuric and phosphoric acids.

Due to its excellent resistance to corrosion, pitting, and crevice corrosion, Nickel Alloy 825 is commonly used in a wide range of industries and applications, including:

  • Chemical processing

  • Oil and gas production

  • Marine environments

  • Nuclear power plants

  • Pharmaceutical and food processing

  • Pulp and paper production

Chemical Composition of 825

The chemical composition of Nickel Alloy 825 typically includes:

  • Nickel (Ni): 38.0-46.0%

  • Chromium (Cr): 20.0-23.0%

  • Iron (Fe): 22.0-25.5%

  • Molybdenum (Mo): 2.5-3.5%

  • Copper (Cu): 1.5-3.0%

  • Manganese (Mn): 1.0% maximum

  • Silicon (Si): 1.0% maximum

  • Carbon (C): 0.05% maximum

  • Sulfur (S): 0.03% maximum

The physical properties of Nickel Alloy 825 are:

  • Density: 8.14 g/cm3

  • Melting Point: 1300-1350°C (2372-2462°F)

  • Thermal Conductivity: 20 W/mK

The mechanical properties of Nickel Alloy 825 at room temperature are:

  • Tensile Strength: ≥ 690 MPa (100 ksi)

  • Yield Strength: ≥ 550 MPa (80 ksi)

  • Elongation: ≥ 35%

  • Hardness (Rockwell B): approximately 95 HRB

It is important to note that the chemical composition, physical properties, and mechanical properties of Nickel Alloy 825 may vary depending on the manufacturer or supplier, and it is always recommended to check the certificate of analysis before using it in any application.

Physical & Mechanical Properties of 825

Variants of Nickel Alloys

There are many variants of nickel alloys, each with unique chemical compositions, properties, and applications. Some of the most common nickel alloys include:

  • Nickel 200 (UNS N02200): A pure nickel alloy with good corrosion resistance and high thermal and electrical conductivity.

  • Nickel 201 (UNS N02201): A low-carbon nickel alloy with high thermal and electrical conductivity and excellent corrosion resistance.

  • Inconel 600 (UNS N06600): A nickel-chromium alloy with excellent resistance to high-temperature corrosion and oxidation.

  • Inconel 601 (UNS N06601): A nickel-chromium-iron alloy with good resistance to high-temperature oxidation and corrosion.

  • Inconel 625 (UNS N06625): A nickel-chromium-molybdenum alloy with excellent resistance to corrosion and high-temperature oxidation.

  • Monel 400 (UNS N04400): A nickel-copper alloy with good corrosion resistance in a variety of environments.

  • Hastelloy C-276 (UNS N10276): A nickel-molybdenum-chromium alloy with excellent resistance to corrosion in a variety of harsh environments.

  • Incoloy 800 (UNS N08800): A nickel-iron-chromium alloy with good resistance to high-temperature corrosion and stress corrosion cracking.

These are just a few examples of the many nickel alloys available. The specific alloy chosen for a particular application depends on the desired properties and the conditions of use. It's always best to consult a materials engineer or specialist for the most appropriate selection.

AVAILABLE FORMS

Intamet offers Alloy 825 in a wide range of forms, including the below:

Stacked Pipes
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