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Short Description:
Inconel X-750 is a nickel-chromium alloy with excellent high-temperature properties and precipitation-hardening properties. It is also known as UNS N07750. The alloy has excellent corrosion resistance and oxidation resistance at high temperatures (up to 1300°F / 704°C). It is commonly used in high-temperature applications such as gas turbines, rocket engines and nuclear reactors, where strength and durability are critical.
Product Description
Inconel X-750 alloy strength is somewhat less than that for Inconel 718 alloy up to about 1400°F (760°C),The alloy was developed from Alloy 600 by adding aluminium and titanium to make the alloy precipitation hardenable. Alloy X-750 also demonstrates good formability and excellent hightemperature oxidation resistance. Alloy X-750 offers outstanding performance in highly stressed environments, which is why it’s often used in gas turbines, nuclear reactors and aircraft structures.Alloy X-750 can be cold-formed in the annealed condition, and may also be hot-formed at temperatures of about 1900°F (1040°C) or above. Weldability is somewhat limited by susceptibility to strain age-cracking under conditions of heavy restraint. The alloy exhibits good resistance to oxidizing combustion gas environments at temperatures up to about 1600°F (870°C).
Inconel X-750 Characteristic:
- Iron-Nickel-Chromium based alloy hardened by precipitation of elements Aluminium and Titanium.
- Good corrosion resistance and oxidation resistance even at high temperatures to 980C,
- Good mechanical strength until 800°C,
- Good relaxation resistance until 540°C,
- Good processability and weldability,
- Excellent mechanical properties in low temperature environment.
Inconel X-750 Chemical Composition
| % | Ni+Co | Cr | C | Mn | Cu | Si | S | Fe | Al | Nb+Ta |
|---|---|---|---|---|---|---|---|---|---|---|
| Min | 70 | 14 | - | - | - | - | - | 5 | 0.4 | 0.7 |
| Max | - | 17 | 0.08 | 1 | 0.5 | 0.5 | 0.01 | 9 | 1 | 1.2 |
Inconel X-750 Physical Properties
| Density | Melting range |
|---|---|
| 8.28g/cm³ | 1393-1427°C |
Inconel X-750 Mechanical Properties
| PROPERTY | 20°C | 200°C | 400°C | 427 °C | 538 °C | 600°C | 649°C | 732°C | 816°C |
|---|---|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength /MPa | 1503.1 | 1351.4 | 744.6 | 688.8 | - | 622.6 | 593 | - | 600 |
| 0.2% Yield Strength /MPa | 979.1 | 737.7 | 365.4 | 340.6 | - | 278.5 | 250.3 | - | 253.7 |
| Elongation % | 36 | 49 | 47 | 47 | - | 46 | 47 | - | 48 |
| Charpy Impact V-notch /J | 436.6 | 115.2 | 189.8 | - | - | - | - | - | - |
| Coefficient of Thermal Expansion µm/m⁰C | - | - | - | 14.22 | 14.94 | 15.12 | 15.48 | 15.66 | 15.84 |
| Thermal Conductivity /kcal/(hr.m.°C) | - | - | 10 | 11.2 | 12.1 | 12.9 | 15 | 15.66 | 15.84 |
| Modulus of Elasticity / x105 MPa | - | - | 1.95 | 1.89 | - | 1.8 | 1.71 | - | 1.61 |
⁎ These parameters are important for the design and manufacture of parts and equipment using Inconel X-750, and can be used to predict their behavior and performance and to determine optimal processing and molding conditions.
Inconel X-750 Process performance and requirements:
Inconel X-750 alloy has good process properties, but the following factors need to be taken into account in the processing and forming process:
Heat treatment:
The Inconel X-750 requires heat treatment for optimal mechanical properties and corrosion resistance. The heat treatment conditions can be adjusted according to the desired properties.
Work hardening:
The Inconel X-750 can be cold worked to achieve higher strength, but attention needs to be paid to the embrittleness of the material to avoid overcold working.
Cutting:
When cutting Inconel X-750, it is necessary to use a tool with sufficient hardness and toughness, and maintain proper cooling lubrication.
Welding:
The welding performance of Inconel X-750 is good, but it is necessary to select appropriate welding materials and processes to avoid weld cracking and other problems.
Finish:
The surface of the Inconel X-750 usually requires pickling and removal of oxide peel to ensure excellent corrosion resistance.
When processing and forming Inconel X-750, the high strength and high temperature properties of the material need to be taken into account to avoid excessive stress and deformation. In addition, Inconel X-750 should also be used to avoid excessive exposure to high temperature and corrosive media, in order to maintain its excellent performance and life.
- Bars & Rods & Foring Ring /Flanges
- Sheet & Plate
- Strip & Coil
- Welding Wire &Spring wire
- Seamless Tube & Welded Pipe
»Round Bar & Square Bar & Hexagon Bar
● Diameter : φ8～φ300mm Length:10mm-6000mm
● Hot forging, Hot Rolling, Cold Drawing
● Bright Surface, Polished Surface, Black Surface
»Tube & Pipe:Seamless Tube& Welded Pipe
● Cold Drawing Seamless Pipe： φ1.0～φ220mm
● Hot Extrusion pipe: φ50～φ250mm
● Others : U Blend Tube and Elbow
»Hot Rolled Plate & Cold Rolled Sheet
● Cold Rolling Sheet Thickness: ≦2.0mm Width:≦1500m
● Hot rolling Plate Thickness: ≧4.0mm Width: ≦2500m
»Strip & Tape Ribbon
● Thickness: ≧ 0.01mm Width: 15mm-300mm
● Cold rolling BA Strip, Hard & Soft Condition
»Straight Length Wire & Spool Wire
● Welding Wire: φ 0.1mm～6.0mm Cut length Rod: φ1.0～φ8.0mm
● Package : 5-25kg/Spool or Box
Alloy X-750 Applications
- Rocket engines
- Gas turbine engines
- Nuclear reactors
- Nuclear valves
- Pressure vessels
- Tooling
- Aircraft structure