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Inconel 690(UNS N06690 W.Nr.2.4642)
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Inconel 690(UNS N06690 W.Nr.2.4642)1.Inconel 690 INTRODUCTION INCONEL alloy 690 is a high-chromium nickel alloy with excellent resistance to many corrosive aqueous media and high-temperature atmospheres. The alloy's high chromium content gives it excellent resistance to aqueous corrosion by oxidizing acids (especially nitric acid) and salts, and to sulfidation at high-temperatures. In addition to its corrosion resistance, alloy 690 has high strength, good metallurgical stability and favorable fabrication characteristics. 2.Inconel 690 STANDARD PRODUCT FORMS Pipe, tube, plate, round bar and forging stock. 3.Inconel 690 MAJOR SPECIFICATIONS UNS N06690 ASTM B 163, B 166 – B 168, B 564, B 829 ASME Code Cases 2083, N-20, N-525 ASME SB-163, SB-166 – SB-168, SB-564, SB-829 Werkstoff Nr. 2.4642 ISO 6207, 6208, 9723 ISO NW6690 4.Inconel 690 LIMITING CHEMICAL COMPOSITION, % Ni ........58.0 min. Cr...... 27.0 – 31.0 Fe........7.0 – 11.0 C..........0.05 max. Plus Co. Mn.......0.50 max. S....... 0.015 max. Si.........0.50 max. Cu........0.50 max. 5.Inconel 690 PHYSICAL CONSTANTS AND THERMAL PROPERTIES Density, Ib/in3 .........................................................................0.296 g/cm3 ......................................................................... 8.19 Melting Range, °F...................................................2450 – 2510 °C...................................................1343 – 1377 Specific Heat, Btu/lb•°F.....................................................0.107 J/kg•°C........................................................... 450 Permeability at 200 Oersted (15.9 kA/m)....................1.001 Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C) 70-200°F (21–93°C)..................... 7.80 (14.0) 70-1000°F (21–538°C)................8.53 (15.4) 70-1600°F (21–970°C)................9.38 (16.9) Thermal ConductivityA , Btu•in/ft2•h•°F....................................84 W/m•°C............................................. 12.1 Electrical ResistivityA , ohm•circ mil/ft..................................691 μΩ•m..................................................1.15 Young’s ModulusA , 106 psi.................................................... 30.6 GPa .......................................................... 211 Poisson’s RatioA...................................................................... 0.29 HardnessA , HRB ..........................................................................85 A Room temperature, as aged. 6.Inconel 690 TYPICAL MECHANICAL PROPERTIES
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