About Alloy
Incoloy 825 is a nickel-iron-chromium alloy renowned for its exceptional resistance to a wide range of corrosive environments, including those containing chloride ions, sulfuric acid, and phosphoric acid. It's particularly resistant to pitting and crevice corrosion, making it ideal for applications in harsh conditions like seawater, acidic or alkaline solutions, and high-temperature water.
The alloy's composition typically includes around 42% nickel, 21% chromium, and 31% iron, with additions of molybdenum (Mo) and copper (Cu) to enhance its corrosion resistance. The presence of molybdenum significantly improves its resistance to pitting and crevice corrosion, while copper contributes to its overall strength and ductility.
Incoloy 825 is also known for its good weldability, allowing it to be easily joined using various welding techniques. This makes it a versatile material for applications requiring fabrication and repair.
Beyond its use in chemical processing, power generation, and oil and gas production, Incoloy 825 finds applications in various industries, including aerospace, marine engineering, and the manufacture of heat exchangers, valves, and pumps.
Product Form
Sheet, Strip and Plate: BS3072 NA16/BS 3073 NA16/ASTM/B424/ ASTM B906/
ASME SB424/ASME SB906/DIN 17750/VdTUV 432
Pipe and Tube: BS 3074 NA16/ASTM B163, ASME SB163,ASTM B423, ASME SB423,ASTM B704, ASME SB704,ASTM B705, ASME SB705, ASTM B751, ASME SB751, ASTM B755, ASME SB755, ASTM B829, ASME SB829, DIN 17751, VdTUV 432
Rod, Bars, Forgings: BS 3076 NA16, ASTM B425, ASTM B564, ASME SB425
ASME SB564, ASME Code Case N-572, DIN 17752, DIN 17753, DIN 17754, VdTUV 432, ASTM B36
Chemical Composition
| Ni | 38-46 | Cr | 19.5-23.5 |
| Fe | Balance | C | 0.05 max |
| Mn | 1.0 max | Si | 0.5 max |
| Cu | 1.5-3.0 | Mo | 2.5-3.5 |
| Al | 0.2 max | Ti | 0.6-1.2 |
| P | 0.02 max | S | 0.01 max |
Property
| Material | Material | Tensile Strength MPa | Yield Strength (0.2% Offset) MPa | Elongation (%) |
| Alloy 825 Tube | Annealed | 772 | 441 | 36 |
| Alloy 825 Tube | Cold Drawn | 1000 | 889 | 15 |
| Alloy 825 Bar | Annealed | 690 | 324 | 45 |
| Alloy 825 Plate | Annealed | 662 | 338 | 45 |
| Alloy 825 Sheet | Annealed | 758 | 421 | 39 |
Application
Chemical Processing: Incoloy 825 is a go-to material for equipment handling strong acids, like sulfuric acid and phosphoric acid, commonly found in chemical plants.
Oil and Gas: The alloy's resistance to chloride ions makes it ideal for components in offshore drilling platforms, pipelines, and processing facilities exposed to seawater.
Power Generation: Incoloy 825 is used in components like heat exchangers, boilers, and piping systems due to its ability to withstand high temperatures and corrosive environments.
Marine Engineering: Its excellent resistance to seawater corrosion makes Incoloy 825 a valuable material for shipbuilding, particularly in components like propellers, shafts, and other underwater structures.
Desalination Plants: Incoloy 825 is used in desalination plants due to its resistance to the harsh conditions of seawater and the chemicals used in the desalination process.
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