Inconel 625

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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