Nickel Alloy Alloy 625 (2.4856)
Nickel Alloy Alloy 625 (2.4856)
Definition:
Alloy 625 is a nickel-based alloy with excellent corrosion resistance, containing molybdenum, niobium and iron.
Density: 8.44 g/cm³
Melting range: 1290-1350°C
Specific heat capacity: 410 J/kg(°C)
Curie temperature: -196°C
Magnetic permeability at 200 Oersted (15.9 kA/m): 1.0006
Coefficient of thermal expansion: 12.8 (21 - 93°C µm/m-°C)
Thermal conductivity: 9.8 W/m(°C)
Resistivity: 1.29 mm²/m
Physical and thermal properties:
In the annealed condition, Alloy 625 has excellent resistance to pitting, crevice corrosion, stress corrosion and corrosion fatigue.
It has good resistance to mineral acids (such as nitric acid, phosphoric acid, sulfuric acid and hydrochloric acid) as well as alkalis and organic acids.
Alloy 625 is widely used in the oil and gas industry, chemical processing industry, marine engineering and environmental engineering.
Chemical composition analysis:
Nickel (Ni): minimum 58.0%
Chromium (Cr): 20.0-23.0%
Molybdenum (Mo): 8.0-10.0%
Niobium (Nb): 3.15-4.15%
Iron (Fe): maximum 5.0%
Carbon (C): maximum 0.10%
Manganese (Mn): maximum 0.50%
Silicon (Si): maximum 0.50%
Sulfur (S): maximum 0.015%
Aluminum (Al): maximum 0.40%
Titanium (Ti): maximum 0.40%
Phosphorus (P): maximum 0.015%
Cobalt (Co): maximum 1.0%
Mechanical properties (annealing):
Creep strength (1000 hours): 52.0 ksi (360 MPa) at 650°C, 23.0 ksi (160 MPa) at 760°C, 7.2 ksi (50 MPa), 2.6 ksi (18 MPa) at 980°C
Alloy 625 (2.4856) is widely used in various industrial environments, especially in high temperature and corrosive conditions, due to its excellent corrosion resistance and wide application areas. Alloy 625 (2.4856) is suitable for low temperature to high temperature applications up to 1090° C (2000° F).
