ELECTRONIC SPACE PRODUCTS INTERNATIONAL

1050 Benson Way, Ashland, OR 97520

Toll Free (800) 638-2581 * Fax (541) 488-8313

E-Mail: sales@espimetals.com

Inconel 718

              Inconel 718 is a precipitation-hardenable nickel-chromium alloy containing significant amounts of iron, niobium, and molybdenum along with lesser amounts of aluminum and titanium. It combines corrosion resistance and high strength with outstanding weldability, including resistance to postweld cracking. The alloy has excellent creep-rupture strength at temperatures up to 700 ^oC (1300 ^oF). Used in gas turbines, rocket motors, spacecraft, nuclear reactors, pumps, and tooling.

Typical Analysis in Percent:

              Ni(+Co):              50 - 55                 Cr:                       17 - 21

              Fe:                       bal                       Co:                       1

              Mo:                      2.8 - 3.3 Nb(+Ta):             4.75 - 5.5

              Ti:                        .65 - 1.15             Al:                       .2 -.8

              C:                         .08                       Mn:                      .35

              Si:                        .35                       B:                         .006

              Cu:                       .3

Physical Properties:

Density: 8.19 g/cm³

Melting Point/Range: 1260 - 1336 ^oC (2300 - 2437 ^oF)

                                                                                      J/kg ⋅ K                             Btu/lb ⋅ ^oF

Specific Heat:                                                              435                                     0.104

                                                                                      µm/m ⋅ K                           µin./in. ⋅ ^oF

Average Coefficient of Thermal Expansion:            13.0                                    7.2

                                                                                      W/m ⋅ K                            Btu ⋅ in./ft² ⋅ h ⋅ ^oF

Thermal Conductivity:                                               11.4                                    79

Electrical Resistivity: 1250 nΩ ⋅ m

Curie Temperature: -112 ^oC (-170 ^oF)

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

                            1240             180                 1036        150                            12                            211           30.6

Hardness: 36 HRC