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

Inconel X-750 (UNS N07750 / W.Nr. 2.4669) is a nickel-chromium alloy similar to Inconel 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˚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.

Equivalent Grades

TrademarkGBGOSTASTMUNSDINW.Nr.NFBSJISSS
Inconel X-750GH4145ЭИ974Inconel X-750N07750XCr15Fe7TiAl2.4669XCr15Fe7TiAlXCr15Fe7TiAlNCF 750

Chemical Composition, %

AlloyCSiMnPSCrNiCoNbAlTiCuFe
Inconel X-750≤0.08≤0.50≤1.00≤0.015≤0.01014.0-17.0≥70.0≤1.00.7-1.20.4-1.02.25-3.75≤0.505.0-9.0

Typical Physical and Mechanical Properties (RT, Annealed+Aged)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HRB
8.281390-143085542740

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM B637/ASME SB637, ISO 9723/9724/9725, EN 10269, BS HR505(Wire), SAE AMS 5698/5699(Wire)
Plate, Sheet and StripISO 6208, SAE AMS 5542/5598
Pipe and Tube
Welding Product
OthersSO 6208, SAE AMS 5542/5598

Features

  • High strength at temperatures to 1500oF (816℃) after suitable heat treatment
  • Creep-rupture strength at high temperatures to about 700℃(1290oF)
  • High tensile and creep-rupture properties
  • Resistance to a wide variety of industrial corrosives under both oxidizing and reducing conditions
  • Excellent workability including machinability and welding
  • Resistance to chloride ion stress-corrosion cracking
  • Precipitation hardenable

Applications

  • Gas turbines
  • Jet engine parts
  • Nuclear power plant applications
  • Heat-treating fixtures
  • Forming tools and extrusion dies
  • Pressure vessels
  • Aircraft structures