ALLOY X750

/ INCONEL X750

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  • N07750
  • 2.4669

ALLOY X750 / INCONEL X750

Alloy X750 / Inconel X750 is a precipitation-hardenable nickel-chromium alloy used for its corrosion and oxidation resistance and high strength at temperatures to 1300°F. Although much of the effect of precipitation hardening is lost with increasing temperature over 1300°F, heat-treated material has useful strength up to 1800°F. Alloy X-750 also has excellent properties down to cryogenic temperatures.

Key properties

(in annealed condition)
Tensile strength: 160.00–165.00
Yield strength: 100.00–105.00
Elongation: 15.00–20.00%
   

Ni+Co

70.00% min

Cr

14.00-17.00%

Fe

5.00-9.00%

Ti

2.25-2.75%

Nb+Ta

0.70-1.20%

Al

0.40-1.00%

Mn

0.00-1.00%

Si

0.00-0.50%

S

0.00-0.01%

Cu

0.00-0.50%

C

0.00-0.08%

Co

0.00-1.00%

INVENTORY

Product form Size range from Size range to
Alloy X750 pipe 0.5 in 8 in
Alloy X750 tube 12 mm 260 mm
Alloy X750 pipe fittings 0.5 in 8 in
Alloy X750 flanges 0.5 in 8 in
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APPLICATIONS

gas-turbine

Alloy X750 can be used in a variety of applications

  • Rocket engines
  • Gas turbine engines
  • Nuclear reactors
  • Nuclear valves
  • Pressure vessels
  • Tooling
  • Aircraft structure

ABOUT ALLOY X750 / INCONEL X750

The economics of INCONEL alloy X-750 coupled with its availability in all standard mill forms has resulted in applications in a wide variety of industrial fields. In gas turbines, it is used for rotor blades and wheels, bolts, and other structural members. INCONEL X750 is used extensively in rocket-engine thrust chambers. Airframe applications include thrust reversers and hot-air ducting systems. Large pressure vessels are formed from INCONEL alloy X-750. Other applications are heat-treating fixtures, forming tools, extrusion dies, and test machine grips. For springs and fasteners, alloy X-750 is used from sub-zero to 1200°F.

Depending on the application and the properties desired, various heat treatments are employed. For service above 1100°F, particularly where loads are to be sustained for long times, optimum properties are achieved by solution treating (2100°F) plus stabilization treating (1550°F) plus precipitation treating (1300°F). For service below 1100°F, the alloy may be strengthened by precipitation treating after hot or cold working or by precipitation treating after equalizing or solution treating. A furnace-cooling treatment is also used to develop optimum properties for some applications.

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Properties of Alloy X750

DENSITY    8.28 g/cm³ | 0.299 lb/in³
MELTING POINT 1393-1427°C | 2540-2600°F
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ALLOY X750 MECHANICAL PHYSICAL PROPERTIES

Property 20°C 200°C 400°C 427 °C 538 °C 600°C 649°C 732°C 816°C
Ultimate Tensile Strength /MPa 1503.1 1351.4 744.6 688.8 - 622.6 593 - 600
0.2% Yield Strength /MPa 979.1 737.7 365.4 340.6 - 278.5 250.3 - 253.7
Elongation % 36 49 47 47 - 46 47 - 48
Charpy Impact V-notch /J 436.6 115.2 189.8 - - - - - -
Coefficient of Thermal Expansion µm/m⁰C - - - 14.22 14.94 15.12 15.48 15.66 15.84
Thermal Conductivity /kcal/(hr.m.°C) - - 10 11.2 12.1 12.9 15 15.66 15.84
Modulus of Elasticity / x105 MPa - - 1.95 1.89 - 1.8 1.71 - 1.61

Alloy X750 Specifications

UNS Number N07750
WNR Number 2.4669
Standards ASTM B637, AMS 5542, 5598, 5670, 5671, 5247

Welding Consumables

WELDING ELECTRODES -
FILLERS

INCONEL Filler Metal 718
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