GH4145 Inconel X 750 Nickel Alloy wires UNS N07750 W.Nr. 2.4669 ASTM B163 for Aerospace

GH4145 (Inconel X-750) Nickel Alloy Seamless Pipe & Tube

GH4145 / Inconel X-750 is a precipitation-hardenable nickel-chromium alloy strengthened by additions of titanium and aluminum. It delivers exceptional high-temperature strength up to 700°C (1292°F) combined with outstanding oxidation resistance and stress-corrosion cracking resistance, making it a premier choice for aerospace, gas turbine, and nuclear applications worldwide.

1.Multi-Country Grade Cross Reference

2.Chemical Composition (Weight %)

3.Key Features & Advantages

• Precipitation Hardenable High Strength: Achieves tensile strength exceeding 1170 MPa after solution annealing and double aging treatment, superior to many solid-solution alloys in its class.
• Excellent High-Temperature Performance: Maintains structural integrity and mechanical properties up to 700°C (1292°F), ideal for gas turbine hot-section components.
• Superior Oxidation Resistance: Forms a stable chromium oxide protective layer, providing long-term oxidation resistance up to 980°C (1796°F).
• Stress-Corrosion Cracking Resistance: Outstanding resistance to chloride-induced stress-corrosion cracking in high-temperature aqueous environments.
• Excellent Relaxation Resistance: Maintains clamping force at elevated temperatures, critical for spring and fastener applications in aerospace and nuclear systems.
• Multi-National Standard Compliance: Certified to GB, AMS, ASTM, DIN, AFNOR, BS, and JIS standards, enabling global sourcing and deployment.

4.Typical Applications

• Aerospace: Jet engine seals, turbine blades, rotors, shafts, afterburner components, thrust reverser assemblies.
• Gas Turbine: Combustion chamber components, transition ducts, diffuser casings, bolting and fasteners.
• Nuclear Reactors: Control rod drive springs, hold-down springs, core support structures, reactor vessel internals.
• Rocket Engines: Thrust chambers, injector plates, nozzle components for liquid-fueled rocket engines.
• Heat Exchangers: High-temperature tubular heat exchangers in chemical processing and petrochemical plants.
• Industrial Springs: High-temperature springs, fasteners, and bolting for furnace components and heat treatment fixtures.

5.Quality Assurance

Every batch of our GH4145 / Inconel X-750 seamless pipe undergoes comprehensive testing:

• 100% PMI (Positive Material Identification) verification
• Ultrasonic testing (UT) per ASTM E213 / ASTM A388
• Eddy current testing (ET) per ASTM E426
• Hydrostatic pressure testing per customer requirements
• Mechanical property testing: tensile, yield, elongation, hardness (aged condition)
• Metallographic examination for grain size and microstructure
• Intergranular corrosion test per ASTM A262 Practice 
• Mill Test Certificate (MTC) per EN 10204 3.1 or 3.2

Contact us today for competitive pricing, full technical datasheets, and sample availability. Custom sizes, cut-to-length service, and third-party inspection (SGS, TUV) available upon request.