Views: 78 Author: Site Editor Publish Time: 2025-02-13 Origin: Site
2.4858 is a nickel-iron-chromium alloy containing molybdenum, copper and titanium.
Density: 8.14 g/cm³
Melting range: 1370-1400°C
Specific heat capacity: 0.105 J/kg(°C)
Curie temperature: -196°C
Permeability at 200 Oster (15.9 kA/m) : 1.005
Coefficient of thermal expansion: 14.0 (21-93 °C µm/m-°C)
Thermal conductivity: 11.1W /m(°C)
Resistivity: 1.13 mm²/m
UNS N08825 / W.N.R.2.4858 is designed to withstand a variety of corrosive environments, especially those containing chlorides.
The nickel contained in the alloy provides resistance to chloride ion stress corrosion cracking. Molybdenum and copper, together with nickel, provide resistance to reducing environments such as those containing sulfides and phosphates.
Molybdenum also provides resistance to pitting and crevice corrosion.
The chromium content provides resistance to oxidizing substances such as nitric acid, nitrite and oxidizing salts.
The addition of titanium helps to stabilize the alloy and reduce the intergranular corrosion sensitivity during welding.
Tensile strength: 100 ksi (690 MPa)
Yield strength (0.2% offset) : 45 ksi (310 MPa)
Elongation: 45%
Nickel (Ni) : 38.0-46.0%
Iron (Fe) : Minimum 22.0%
Chromium (Cr) : 19.5-23.5%
Molybdenum (Mo) : 2.5-3.5%
Copper (Cu) : 1.5-3.0%
Titanium (Ti) : 0.6-1.2%
Carbon (C) : Maximum 0.05%
Manganese (Mn) : Maximum 1.0%
Silicon (Si) : up to 0.5%
Aluminum (Al) : up to 0.2%
Alloy 825 has a wide range of applications in chemical processing, pollution control, oil and gas recovery, acid production, desalination operations, nuclear fuel reprocessing and radioactive waste disposal.
Alloy 825 (2.4858) is widely used in a variety of industrial environments, especially under high temperature and corrosive conditions, due to its excellent corrosion resistance and wide range of applications.
