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Incoloy alloy 825 is a nickel - iron - chromium alloy with addition of molybdenum and copper. It is widely used in the form of plates in various industries due to its excellent properties.
inco 825 chemical composition
| Property Category | Element | Content Range (wt%) |
|---|---|---|
| Chemical Composition | Nickel (Ni) | 42 - 46 |
| Chromium (Cr) | 19.5 - 23.5 | |
| Iron (Fe) | Balance | |
| Molybdenum (Mo) | 2.5 - 3.5 | |
| Copper (Cu) | 1.5 - 3.0 | |
| Manganese (Mn) | Small amount with specific content limits | |
| Silicon (Si) | Small amount with specific content limits | |
| Carbon (C) | Small amount with specific content limits | |
| Phosphorus (P) | Small amount with specific content limits | |
| Sulfur (S) | Small amount with specific content limits | |
| Mechanical Properties | (To be filled as you provide more details later about tensile strength, yield strength, etc. Currently, this part of the table is left for further expansion.) |
inco 825 Mechanical Properties
Strength: It has good tensile strength, with typical values of around 655 - 758 MPa in the annealed condition. The yield strength is usually in the range of 290 - 352 MPa.
Ductility: Incoloy alloy 825 plates exhibit excellent ductility, with an elongation at break of around 30 - 40%. This allows for easy forming and fabrication into various shapes and structures.
Toughness: It possesses good toughness, enabling it to withstand impact and dynamic loading without brittle failure.
Corrosion Resistance
General Corrosion Resistance: It shows outstanding resistance to a wide range of corrosive environments. It is highly resistant to acids such as sulfuric acid, hydrochloric acid, and phosphoric acid, even at elevated temperatures and concentrations. It also has good resistance to alkaline solutions.
Pitting and Crevice Corrosion Resistance: The alloy has a high resistance to pitting and crevice corrosion due to its specific chemical composition and microstructure. This makes it suitable for applications where the material is exposed to aggressive media in confined spaces or in the presence of stagnant solutions.
Stress Corrosion Cracking Resistance: Incoloy alloy 825 has excellent resistance to stress corrosion cracking (SCC) in many environments, including those containing chlorides and sulfides. This property is crucial in preventing sudden and catastrophic failures in stressed components.
Applications
Chemical Processing Industry: It is widely used in equipment for handling corrosive chemicals, such as reactors, heat exchangers, and storage tanks. Its corrosion resistance and heat resistance make it ideal for processes involving various acids and high - temperature operations.
Oil and Gas Industry: Incoloy alloy 825 plates are used in downhole equipment, pipelines, and wellheads, especially in environments where there is a presence of corrosive fluids like oil - field brines and sour gases. Its resistance to pitting, crevice corrosion, and stress corrosion cracking is essential for ensuring the reliability and longevity of these components.
Water Treatment: It is employed in desalination plants and water treatment systems, particularly in components that come into contact with seawater or other corrosive water sources. Its corrosion resistance helps to prevent premature failure and maintain the integrity of the equipment.
Food Processing: Due to its non - toxic and corrosion - resistant nature, it is used in some food processing applications, such as in equipment for handling acidic food products or in environments where cleanliness and resistance to corrosion are important.
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