Inconel X-750(UNS N07750 W.Nr. 2.4669)

1.Inconel X-750 INTRODUCTION

A nickel-chromium alloy similar to INCONEL  alloy 600 but made precipitation hardenable  by additions of aluminum and titanium. It has  good resistance to corrosion and oxidation  along with high tensile and creep-rupture  properties at temperatures to 1300°F (700°C).  Its excellent relaxation resistance is useful for  high-temperature springs and bolts. Used in  gas turbines, rocket engines, nuclear reactors,  pressure vessels, tooling and aircraft structures.

2.Inconel X-750 STANDARD  PRODUCT FORMS

Sheet, strip, plate, round bar, flat bar, forging stock,  hexagon, wire, tubing and extruded section.

3.Inconel X-750 MAJOR  SPECIFICATIONS

UNS N07750 

BS HR 505 

ASTM B 637 

ASME SB-637 

Werkstoff Nr. 2.4669 

NACE MR-0175/ISO 15156 

SAE AMS 5542, 5582, 5583,   5598, 5667 – 5671, 5698,   5699, 5747 

EN 10269 ISO 6208, 9723 – 9725

4.Inconel X-750 LIMITING CHEMICAL  COMPOSITION, %

Ni.........70.0 min. 

Cr ..... 14.0 – 17.0 

Fe..........5.0 – 9.0 

Ti ......2.25 – 3.75 

Plus Co.

Al ......0.40 – 1.00 

Nb...0.70 – 1.20

C..........0.08 max. 

Mn.......1.00 max. 

 Plus Ta. 

Si.........0.50 max. 

 S..........0.01 max. 

Cu........0.50 max. 

Co......1.00 max. 

If determined.

5.Inconel X-750 PHYSICAL CONSTANTS  AND THERMAL  PROPERTIES

Density, Ib/in3 .........................................................................0.299

g/cm3 ......................................................................... 8.28 

Melting Point, °F.....................................................2540 – 2600

°C.....................................................1390 – 1430

Specific Heat, Btu/lb •°F....................................................0.103 

J/kg •°C.......................................................... 431 

Curie Temperature, °F.......................................................... -193 

°C ......................................................... -125 

Permeability at 200 Oersted (15.9 kA/m)................. 1.0035 

Coefficient of Expansion, 70 – 200°F, 10-6 in/in •°F........ 7.0 

21 – 93°C, μm/m •°C............ 12.6 

Thermal Conductivity, Btu • in/ft2• h•°F..............................83 

W/m•°C.......................................... 12.0 

Electrical Resistivity, ohm • circ mil/ft............................. 731

μΩ•m................................................ 1.22

6.Inconel X-750 TYPICAL MECHANICAL  PROPERTIES