Inconel  706(UNS  N09706)

1.Inconel 706 INTRODUCTION

INCONEL alloy 706 is a precipitation-hardenable  nickel-iron-chromium alloy that provides high  mechanical strength in combination with good  fabricability. The properties of the alloy are  similar to those of INCONEL alloy 718 (N07718)  except that alloy 706 is more readily fabricated,  particularly by machining. Primary uses of the  alloy are aerospace and land-based gas turbine  parts and components, requiring resistance to  creep, and stress rupture up to 1300˚F (704˚C),  oxidation resistance and good fabricability

2.Inconel 706 STANDARD  PRODUCT FORMS

Round bar and forging stock.

3.Inconel 706 MAJOR  SPECIFICATIONS

UNS N09706 

SAE AMS 5605, 5606, 5701 – 5703

4.Inconel 706 LIMITING CHEMICAL  COMPOSITION, %

Ni .....39.0 – 44.0 

Cr...... 14.5 – 17.5

Fe......Remainder 

Nb........2.5 – 3.3 

 Plus Co. 

Plus Ta. 

Ti ...........1.5 – 2.0 

Al .........0.40 max.

C..........0.06 max. 

Cu........0.30 max. 

Mn.......0.35 max. 

S....... 0.015 max. 

Si.........0.35 max. 

P........ 0.020 max. 

B....... 0.006 max. 

Co........1.00 max

5.Inconel 706 PHYSICAL CONSTANTS  AND THERMAL  PROPERTIES

Density, Ib/in3  (g/cm3)...........................................0.291 (8.05) 

Melting Range, °F (°C).............2434 – 2499 (1334 – 1371) 

 Specific Heat, Btu/lb•°F (J/kg•°C)......................0.106 (444) 

Curie Temperature, °F (°C)...................................<-109 (-78) 

Permeability at 200 Oersted (15.9 kA/m)....................1.011 

Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C) 70-200°F (21–93°C).....................7.40 (13.3) 

70-500°F (21–260°C) ................. 8.25 (14.9) 

70-800°F (21–427°C) ................. 8.57 (15.4) 

70-1000°F (21–538°C)............... 8.73 (15.7) 

70-1200°F (21–650°C)............... 8.97 (16.2)

Thermal ConductivityA , Btu•in/ft2•h•°F....................................87 

W/m•°C............................................. 12.5 

Electrical ResistivityA , ohm•circ mil/ft..................................592 

μΩ•m............................................... 0.985 

Young’s ModulusA , 106  psi (GPa)............................ 30.4 (210) 

Shear’s ModulusA , 106  psi (GPa)...............................11.0 (76) 

Poisson’s RatioA....................................................................0.382 

HardnessA , HRC ................................................................36 – 42 A 

Room temperature, as aged.

6.Inconel 706 TYPICAL MECHANICAL  PROPERTIES