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
Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
Inconel X-750 | GH4145 | ЭИ974 | Inconel X-750 | N07750 | XCr15Fe7TiAl | 2.4669 | XCr15Fe7TiAl | XCr15Fe7TiAl | NCF 750 | – |
Chemical Composition, %
Alloy | C | Si | Mn | P | S | Cr | Ni | Co | Nb | Al | Ti | Cu | Fe |
Inconel X-750 | ≤0.08 | ≤0.50 | ≤1.00 | ≤0.015 | ≤0.010 | 14.0-17.0 | ≥70.0 | ≤1.0 | 0.7-1.2 | 0.4-1.0 | 2.25-3.75 | ≤0.50 | 5.0-9.0 |
Typical Physical and Mechanical Properties (RT, Annealed+Aged)
Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRB |
8.28 | 1390-1430 | 855 | 427 | 40 | – |
Available Products and Specifications
Rod, Bar, Wire and Forgings | ASTM B637/ASME SB637, ISO 9723/9724/9725, EN 10269, BS HR505(Wire), SAE AMS 5698/5699(Wire) |
Plate, Sheet and Strip | ISO 6208, SAE AMS 5542/5598 |
Pipe and Tube | – |
Welding Product | – |
Others | SO 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