Amardeep Steel Centre is a speciality supplier of Inconel X-750 Pipe Fittings, a product range of age-hardenable, high strength nickel-chromium alloy used for gas turbine sections, nuclear pressure system and high fatigue engineering applications. We stock and supply Inconel X-750 buttweld fittings and Inconel X750 forged fittings which are fully-marked with EN 10204 3.1 documentation and can be supplied with ASTM B366 / B637 certification. We keep a stock of UNS N07750 pipe fittings in standard sizes and dispatch to global destinations very quickly. Alloy X750 fittings are heat-treated to ensure a fine dispersion of γ' precipitates, which gives excellent creep-rupture strength and high fatigue strength between cryogenic temperatures and 980 °C.
Request a QuoteUNS N07750 Pipe Fittings Specifications
Parameter | Details |
Specification | ASTM B366 / ASME SB366 / ASTM B637 |
UNS No. | N07750 |
Werkstoff No. | 2.4669 |
Size Range (BW) | 1/2" NB to 24" NB |
Schedules | SCH 10 to XXS |
Dimension Standards | ASME B16.9, ASME B16.11, MSS SP-43 |
Form | Seamless; Solution Annealed; Aged |
End Finish | BE, PE, TE |
Types of Inconel X-750 Pipe Fittings
Fitting | Description | Standard |
Inconel X750 Elbow | 45° / 90° LR & SR elbows | ASME B16.9 |
Inconel X750 Tee | Equal and reducing tees | ASME B16.9 |
Inconel X750 Reducer | Concentric / eccentric | ASME B16.9 |
Inconel X750 Forged Fittings | SW elbows, tees, couplings | ASME B16.11 |
Threaded Fittings | NPT threaded elbows, bushings | ASME B16.11 |
End Cap | Pipe end closures | ASME B16.9 |
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Inconel X-750 Chemical Composition
Ni (min) | Cr | Fe | Nb | Ti | Al | C (max) |
70% min | 14–17% | 5–9% | 0.7–1.2% | 2.25–2.75% | 0.4–1.0% | 0.08% |
Inconel X-750 Mechanical Properties
UTS (MPa) | 0.2% YS (MPa) | Elongation (%) | Hardness (Rb max) |
1241 (aged) | 862 (aged) | 20 min | ≤ 43 Rc |
Equivalent Grades of Inconel X-750
UNS | W.Nr. | AMS | BS | Common Name |
N07750 | 2.4669 | AMS 5542 | HR 201 | Alloy X-750 |
Applications of Inconel X-750 Pipe Fittings
- Gas turbines: compressor blades, blade roots, seals, and turbine section piping where Inconel X750 pipe fittings supplier grade is standard
- Nuclear reactors: fuel element spacer springs, reactor vessel bolts, and piping connections
- Industrial engineering: high-temperature springs, tooling components, pressure-bearing assemblies
- Aerospace: aircraft structural fastener housings and cryogenic fluid line fittings
- Pressure vessels: high-fatigue service where age-hardened strength is required beyond what Inconel 600 offers
Frequently Asked Questions
Q: What is Inconel X-750 and why is it used for pipe fittings?
A: Inconel X-750 (UNS N07750) is an age-hardenable nickel-chromium alloy with titanium and aluminium additions. Its high strength at elevated temperatures makes it ideal for spring-loaded, pressure-bearing, and gas turbine pipe fittings.
Q: What heat treatment is required for Inconel X-750 Pipe Fittings?
A: Inconel X-750 fittings are supplied in the annealed condition or fully aged (1150°C anneal + double aging at 845°C/720°C) to achieve maximum creep and stress-rupture strength for high-temperature service.
Q: What is the UNS number of Inconel X-750 Pipe Fittings?
A: Inconel X-750 Pipe Fittings carry UNS designation N07750, Werkstoff number 2.4669, and are produced per ASTM B366 and ASTM B637 specifications.
Q: Can Inconel X-750 fittings be used in gas turbine applications?
A: Yes. Inconel X-750 is widely used in gas turbine blades, discs, and combustion section piping up to 980 °C, retaining significant strength through γ' precipitation hardening mechanisms.
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