Inconel 625
Inconel 625 is a nickel-chromium-molybdenum alloy with an addition of niobium that acts with the molybdenum to stiffen the alloy’s matrix and thereby provide high strength without a strengthening heat treatment. The alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion. Used in chemical processing, aerospace and marine engineering, pollution-control equipment, and nuclear reactors.
Typical Analysis in Percent:
Ni 58 min Cr 20 - 23
Fe 5 Co 1
Mo 8 - 10 Nb(+Ta) 3.15 - 4.15
Ti 0.4 Al 0.4
C 0.1 Mn 0.5
Si 0.5
Physical Properties:
Density: 8.44 g/cm3
Melting Point/Range: 1290 - 1350 oC (2350 - 2460 oF)
J/kg ⋅ K Btu/lb ⋅ oF
Specific Heat: 410 0.098
µm/m ⋅ K µin./in. ⋅ oF
Avg. Coefficient of Thermal Expansion: 12.8 7.1
W/m ⋅ K Btu ⋅ in./ft2 ⋅ h ⋅ oF
Thermal Conductivity: 9.8 68
Electrical Resistivity: 1290 nΩ ⋅ m
Typical Mechanical Properties:
At Room Temperature:
Ultimate Tensile Yield Strength Elongation in Elastic Modulus
Strength (0.2 % offset) 50 mm (2") (Tension)
MPa ksi MPa ksi % GPa 106 psi
930 135 517 75 42.5 207 30
Hardness: 190 HB