Inconel 693 Tube

A nickel-chromium-aluminum alloy offering the best resistance to metal dusting of any available conventional alloy. Alloy 693 also offers exceptional resistance to oxidation and carburization at temperatures up to 2100°F (1150°C) with excursions to even higher temperatures. The alloy’s ability to resist metal dusting is especially useful in systems used to reform hydrogen and generate synthesis gas for various industries, including gas and liquid fuel production. Alloy 693 is protected by U.S. Patent Number 4,882,125.STANDARD PRODUCT FORMSPlate, sheet, strip, bar, seamless tubes and pipes.MAJOR SPECIFICATIONSUNS N06693ASTM B 166, B 167, B 168ASME SB 166, SB 167, SB 168LIMITING CHEMICAL COMPOSITION, %Ni..... RemainderaCr...... 27.0 – 31.0Fe..............2.5-6.0Al...............2.5-4.0Nb.............0.5-2.5Mn.......... 1.0 max.Ti............ 1.0 max.Cu........0.50 max.Si..........0.50 max.C...........0.15 max.S........ 0.015 max.aElement determined arithmetically by difference.PHYSICAL CONSTANTS AND THERMAL PROPERTIESDensity, Ib/in3.........................................................................0.280g/cm3..........................................................................7.77Melting Range, °F...................................................2403 – 2493°C...................................................1317 – 1367Specific Heat, Btu/lb•°F......................................................0.109J/kg•°C............................................................ 455Permeability at 200 Oersted.......................................... <1.005Electrical ResistivityA, ohm•circ mil/ft............................... 702.7Thermal ConductivityA, Btu•in/ft2•h•°F................................. 64.3W/m•°C.................................................9.1Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C)70-200°F (21–93°C)....................7.22 (13.04)Young’s ModulusA, 103 psi.................................................... 28.5GPa........................................................... 197Shear ModulusA, 103 psi........................................................ 11.0GPa..................................................................76Poisson’s RatioA....................................................................... 0.30ARoom temperature, as aged.TYPICAL MECHANICAL PROPERTIES