Materials / Superalloy
Inconel X-750
- UNS
- N07750
- W.Nr
- 2.4669
- EN
- NiCr15Fe7TiAl
A precipitation-hardening variant of 600, using titanium and aluminium to deliver high strength and relaxation resistance at temperature.
Composition
| Element | Min | Max |
|---|---|---|
| Ni | 70.0 | — |
| Cr | 14.0 | 17.0 |
| Fe | 5.0 | 9.0 |
| Ti | 2.25 | 2.75 |
| Nb+Ta | 0.70 | 1.20 |
| Al | 0.40 | 1.00 |
| C | — | 0.08 |
Per cent by weight, to the governing standard.
- Ni73.3
- Cr15.5
- Fe7.0
- Ti2.5
- Nb+Ta0.9
- Al0.7
Per cent by weight, at the midpoint of each specified window. Elements given only as a maximum have no midpoint to take, so they sit inside the balance rather than being estimated; trace elements below 0.5 % are not shown. Indicative only; the composition table above and the governing standard are what define the limits.
Mechanical
- Tensile strength, min
- 1100 MPa
- Yield strength (0.2%), min
- 690 MPa
- Elongation, min
- 20 %
- Condition
- Age hardened, ASTM B637 — condition to be specified on order
Standards by form
| Bar, forgings & rings | ASTM B637 | |
|---|---|---|
| Plate, sheet & strip | AMS 5542 |
Where it is specified
- Springs, fasteners and rotor components to roughly 700 °C
- Excellent relaxation resistance under sustained load
- Properties depend on a controlled ageing cycle
An under-aged spring relaxes in service and tests fine cold
Like 718, X-750 is a heat-treatment grade. Chemistry inside limits proves nothing about whether the ageing cycle was run correctly, and an under-aged spring relaxes in service.
What we specify and check
- Heat treatment records demanded and read
- Hardness verification on the delivered heat
- PMI for Ti and Al against B637
We commission an accredited independent laboratory to test the heat before the material leaves China. You will receive that report unedited, whether it passes or not.
Request Inconel X-750
Tell us the form, dimensions and service conditions. We reply with availability, indicative landed price, lead time and the test regime we would specify for your application.
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