Inconel 693(UNS  N06693)

1.Inconel 693 INTRODUCTION

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.

2.Inconel 693 STANDARD  PRODUCT FORMS

Plate, sheet, strip, bar, seamless tubes and pipes

3.Inconel 693 MAJOR  SPECIFICATIONS

UNS N06693 

ASTM B 166, B 167, B 168 

ASME SB 166, SB 167, SB 168

4.Inconel 693 LIMITING CHEMICAL  COMPOSITION, %

Ni.... Remaindera

Cr...... 27.0 – 31.0 

Fe.............2.5-6.0 

Al ..............2.5-4.0 

Nb ............0.5-2.5 

Mn......... 1.0 max. 

Ti ........... 1.0 max. 

Cu........0.50 max. 

Si.........0.50 max. 

C..........0.15 max. 

S....... 0.015 max. 

Element determined arithmetically by difference.

5.Inconel 693 PHYSICAL CONSTANTS  AND THERMAL  PROPERTIES

Density, Ib/in3 ........................................................................0.280

g/cm3 ..........................................................................7.77 

Melting Range, °F...................................................2403 – 2493 

°C ..................................................1317 – 1367

Specific Heat, Btu/lb•°F.....................................................0.109 

J/kg•°C........................................................... 455

Permeability at 200 Oersted.......................................... <1.005 

Electrical ResistivityA , ohm•circ mil/ft.............................. 702.7 

Thermal ConductivityA , Btu•in/ft2•h•°F................................ 64.3 

W/m•°C................................................9.1

Coefficient 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.................................................... 28.5 

GPa .......................................................... 197 

Shear ModulusA , 103  psi....................................................... 11.0 

GPa.................................................................76 

Poisson’s RatioA...................................................................... 0.30 

A Room temperature, as aged.

6.Inconel 693 TYPICAL MECHANICAL  PROPERTIES