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X-750 Sheet Stock, Coil - AMS 5598, AMS 5542 - Inconel® Alloy Equivalent

Inconel Alloy® X-750 is a nickel-chromium austenitic alloy similar to 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 high temperatures to 1300°F (700°C).  This material has excellent relaxation resistance and is non-magnetic. It has good elevated temperature strength properties to 1300ºF (700°C) and oxidation resistance to 1800ºF (983˚C). Inconel X 750 is resistant to a wide variety of industrial corrosives under both oxidizing and reducing conditions. This alloy also has excellent resistance to chloride stress corrosion cracking in the fully age hardened condition.

  • Alloy X750
    Alloy X750

X750 Coil
X750 Sheet

Standard Inventory Specifications 

  • UNS N07750
  • AMS 5598
  • AMS 5542
  • ASTM B 637
  • ASME SB 637
  • W.Nr 2.4669
  • GE-S400/1000
  • RR SABRe Edition 2
  • DFARS Compliant
  • SAE AMS 5598

Common Trade Names

  • ATI X-750 (™ Allegheny Technologies)
  • Inconel Alloy X-750  (® Special Metals)

Inventory Size Range

  • Sheet : 0.023" - 0.075" 

All of our Alloy X-750 nickel sheet and coil is ordered to specific decimal thicknesses.  Alloy X750 coil can also be slit to your desired width. Please contact us for more details.

The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.

Alloy X750 Chemical Composition

Element Percent By Weight
70% min
Cr Chromium 14-17%
Fe Iron 5-9%
Ti Titanium 2.25-2.75%
Al Aluminum 0.4-1.0%
Nobelium &
Si Silicon 0.50% max
S Sulfur 0.01% max
Cu Copper 0.50% max
C Carbon 0.08% max
Co Cobalt 1.00% max

Common Applications of Alloy X 750

  • Structural members in hot sections of gas turbines such as discs, thrust reversers, and ducts
  • Aircraft structures
  • Rocket engines
  • Nuclear reactors
  • Heat treat fixtures
  • Cryogenic vessels, springs, and fasteners
  • Wire formulation with heat temper used in springs at elevated temperatures

Alloy X750 Physical Properties

Physical Property Values


0.298 lb/inᶟ, 8.26 g/cmᶟ

Melting Range

2540-2600°F, 1395-1425°C

Curie Temperature

-225°F as hot-rolled

       -193 triple-heat-treated (2100°F/2 hr, A.C., +1500°F/24 hr, A.C. + 1300°F/20 hr, A.C.)             

Magnetic Permeability

70°F, 200H, as hot rolled 1.0020

1.0035 triple-heat-treated (2100°F/2 hr, A.C., +1500°F/24 hr, A.C., +1300°F/20 hr, A.C.)

Emissivity  Oxidized Surface

600°F  0.895, 2000°F  0.925

Linear Contraction During Precipitation Treatment

1300°F/20 hr), in/in  Hot-rolled 0.00044, 20% Cold-rolled 0.00052, Annealed 0.00026

Mechanical Properties and Yield Strength of Alloy X 750 

Minimum Specified Properties

Ultimate Tensile Strength, ksi


.02% Yield Strength, ksi


Elongation, %


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