Alloy Wire International
Datasheet: Inconel® X750
Inconel® X750
Inconel® X750 is a Nickel-Chromium alloy made precipitation hardenable by additions of Aluminium and Titanium, having creep-rupture strength at high temperatures to about 700°C (1290°F). It is widely used for high temperature conditions but is not as strong as Nimonic 90, but Inconel® X750 also holds exceptional properties all the way down to cryogenic temperatures.
Available in all profile options
Key Features
Inconel® X750 offers the following key features:
Good creep rupture strength at high temperatures
Not as strong as Nimonic 90
Very good at cryogenic temperatures
Age hardenable
High temperature dynamic applications^^
Typical Applications
Inconel® X750 is known to be suitable for the following applications:
Nuclear reactors
Gas turbines
Rocket engines
Pressure vessels
Aircraft structures
Designations
W.NR 2.4669
UNS N07750
AWS 014
Specifications
AMS 5667
AMS 5671
AMS 5698 (No 1 Spring Temper)
AMS 5699 (Spring Temper)
ASTM B637
BS HR 505
GE B14H41
ISO 15156-3 (NACE MR 0175)
Chemical Composition
The chemical composition of Inconel® X750 is indicated in the table below:
| Element | Min % | Max % |
|---|---|---|
| C | – | 0.08 |
| Mn | – | 1.00 |
| Si | – | 0.50 |
| S | – | 0.01 |
| Cr | 14.00 | 17.00 |
| Ni | 70.00 | – |
| Nb/Cb | 0.70 | 1.20 |
| Ti | 2.25 | 2.75 |
| Al | 0.40 | 1.00 |
| Fe | 5.00 | 9.00 |
| Co | – | 1.00 |
| Ta | – | 0.05 |
| Cu | – | 0.50 |
Alloy Details
Inconel® X750 density, melting point, coefficient of expansion, modulus of rigidity, and elasticity is indicated in the table below:
| Density | Melting Point | Coefficient of Expansion | Modulus of Rigidity | Modulus of Elasticity |
|---|---|---|---|---|
| 8.28g/cm³ | 1430 °C | 12.6 μm/m °C (20 – 100 °C) | 75.8 kN/mm² | 218.0 kN/mm² (Spring Temper + Aged) 212.4 kN/mm² (Spring Temper + 3 Part Heat Treated) 213.7 kN/mm² (No.1 Spring Temper + Aged) |
| 0.299 lb/in³ | 2600 °F | 7.0 x 10-6 in/in °F (70 – 212 °F) | 10994 ksi | 31619 ksi (Spring Temper + Aged) 30806 ksi (Spring Temper + 3 Part Heat Treated) 30995 ksi (No.1 Spring Temper + Aged) |
Heat treatment of finished parts
The typical heat treatment of Inconel® X750:
| Condition as supplied by AWI | Type | Temperature | Time | Cooling |
|---|---|---|---|---|
| Spring Temper | Age Harden | 650 °C (1200 °F) | 4hr | Air |
| Spring Temper (3 Part) | Anneal Stabilize Age Harden | 1150 °C (2100 °F) 843 °C (1550 °F) 704 °C (1300 °F) | 2hr † 24hr 20hr | Air Air Air |
| No. 1 Temper | Age Harden | 730 °C (1350 °F) | 16hr | Air |
Properties
The typical mechanical properties of Inconel® X750:
| Annealed | ||
|---|---|---|
| Approx. tensile strength | <1000 N/mm² | <145 ksi |
| No. 1 Temper | ||
|---|---|---|
| Approx. tensile strength | 900 – 1150 N/mm² | 130 – 167 ksi |
| Spring Temper | ||
|---|---|---|
| Approx. tensile strength | 1100 – 1500 N/mm² | 160 – 218 ksi |
| No. 1 Temper + Aged | ||
|---|---|---|
| Approx. tensile strength | 1150 – 1450 N/mm² | 167 – 210 ksi |
| Approx. operating temperature depending on load^^ and environment | -200 to +550 °C | -330 to +1020 °F |
| Spring Temper + Aged | ||
|---|---|---|
| Approx. tensile strength | 1350 – 1750 N/mm² | 196 – 254 ksi |
| Approx. operating temperature depending on load^^ and environment | -200 to +370 °C | -330 to +700°F |
| Spring Temper + 3 Part Heat Treated | ||
|---|---|---|
| Approx. tensile strength | >1030 N/mm² | >149 ksi |
| Approx. operating temperature depending on load^^ and environment | -200 to +550 °C | -330 to +1020 °F |
The above tensile strength ranges are typical. If you require different please ask.
*Trade name of Special Metals Group of Companies
† for diameters below 1.00mm contact AWI quality department.
^^ Dynamic applications = active / lively / changing
