Inconel X-750 is a nickel-chromium superalloy renowned for its exceptional high-temperature strength, corrosion resistance, and creep resistance. Developed for demanding aerospace, power generation, and industrial applications, it has become a preferred material where high performance and reliability are critical.
Huaxiao Metal specializes in supplying high-quality Inconel X-750 bars, plates, sheets, and tubes, offering comprehensive technical support and customized sizes, material certificates (MTC/MTR), and flexible order sizes based on specific customer industrial needs. This guide provides a comprehensive overview of Inconel X-750, including its chemical composition, mechanical properties, heat treatment, processing techniques, applications, and sourcing strategies.
Definition and Overview
Inconel X-750 UNS N07750 is a precipitation-hardenable nickel-chromium alloy designed for high-temperature applications. The alloy exhibits:
Excellent high-temperature strength up to 700°C (1292°F)
Resistance to oxidation and corrosion
Good stress-corrosion cracking resistance
Exceptional fatigue properties in harsh environments
It is commonly used in aerospace turbine engines, nuclear reactors, chemical processing equipment, and high-temperature valves.
Chemical Composition of Inconel X-750
Inconel X-750 is a nickel-based superalloy designed to withstand extreme environments. Its chemical composition significantly contributes to its high-temperature strength and corrosion resistance.
| Element | Typical Content (%) | Function |
|---|---|---|
| Nickel (Ni) | 70 | Provides matrix, high-temperature strength |
| Chromium (Cr) | 14–17 | Enhances oxidation and corrosion resistance |
| Iron (Fe) | 7–10 | Improves strength and ductility |
| Titanium (Ti) | 1–1.5 | Precipitates for strengthening |
| Aluminum (Al) | 0.4–0.8 | Forms gamma prime phase, enhances strength |
| Manganese (Mn) | 0.35 | Impurity control and deoxidation |
| Silicon (Si) | 0.35 | Oxidation resistance |
| Cobalt (Co) | 1.5 | Improves high-temperature strength |
| Carbon (C) | 0.07 | Strengthens grain boundaries |
Huaxiao Metal ensures all Inconel X-750 products meet international standards with full MTC certification for traceability.
Mechanical Properties
Inconel X750 maintains excellent mechanical properties across high temperatures, making it ideal for turbines, exhaust systems, and aerospace components.
| Property | Typical Value |
|---|---|
| Ultimate Tensile Strength | 130–140 ksi (896–965 MPa) |
| Yield Strength | 80–90 ksi (552–620 MPa) |
| Elongation | 20–25% |
| Hardness (HRB) | 85–95 |
| Creep Rupture Strength @ 1200°F (650°C) | 20–30 ksi (138–207 MPa) |
Key Features:
Maintains strength up to 1300°F (704°C)
Excellent resistance to creep and stress relaxation
High fatigue strength for critical components
Physical Properties
| Property | Value |
|---|---|
| Density (g/cm³) | 8.3 |
| Melting Range (°C) | 1260 – 1330 |
| Thermal Conductivity (W/m·K) | 11.2 at 538°C |
| Coefficient of Thermal Expansion (µm/m·°C) | 13.1 (20–100°C) |
These superior properties make Inconel X-750 ideal for aerospace turbine components, nuclear reactors, and chemical processing equipment.
High-Temperature Properties
| Temperature (°C) | Tensile Strength (MPa) | Yield Strength (MPa) |
|---|---|---|
| 538 | 827 | 517 |
| 650 | 655 | 414 |
| 704 | 552 | 345 |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | N07750 |
| ASTM | B637, B637M |
| AMS | 5662, 5763 |
| DIN | X750 |
| JIS | NCF750 |
Tip: International equivalents allow engineers and procurement teams to source Inconel X-750 globally with confidence.
Heat Treatment of Inconel X-750
Proper heat treatment is crucial to unlock the full potential of Inconel X750.
Solution Annealing
Heat to 1750–1850°F (955–1010°C)
Rapidly quench in water
Dissolves carbides and prepares for precipitation strengthening
Aging Treatment
Typically 1325–1375°F (718–746°C) for 8–24 hours
Precipitates gamma-prime (Ni₃(Al,Ti)) phase
Enhances tensile strength, creep resistance, and hardness
Huaxiao Metal provides pre-aged and custom heat-treated options to meet client specifications.
Fabrication & Machining of Inconel X 750
Inconel X750’s high strength makes machining challenging, but with proper methods, it can be fabricated efficiently.
Welding: Suitable for GTAW, SMAW, and EB welding. Preheating recommended to avoid cracking.
Cutting & Drilling: Use carbide or high-speed steel tools. Apply cutting fluids to minimize work hardening.
Grinding: Hard alloys require diamond or ceramic abrasives for precision finishes.
Forming: Cold working is limited; hot working is recommended for complex shapes.
Huaxiao Metal offers technical support for machining and fabrication to ensure optimal performance.
Applications of Inconel X-750
Inconel X750 is used across multiple high-performance industries:
Aerospace
- Turbine blades, discs, and combustor components
- High-temperature oxidation resistance ensures safety and longevity
Power Generation
- Nuclear reactor components, steam turbine blades
- Withstands high temperatures and radiation environments
Chemical & Petrochemical
- Valves, pumps, and heat exchangers
- Corrosion resistance in acidic and oxidizing environments
Industrial & Automotive
- Exhaust systems and turbochargers
- High fatigue strength and thermal stability
Huaxiao Metal can provide Inconel X-750 in bars, sheets, plates, and custom profiles for specific applications.
Standards and Certification
Inconel X750 must comply with international standards for quality assurance and traceability:
ASTM B637 / B637M – bars, forgings, and components
AMS 5662 / 5763 – aerospace components
ISO 9001 / ISO 14001 – quality management
Material Test Reports (MTR / MTC) ensure:
- Chemical composition verification
- Mechanical properties confirmation
- Heat treatment validation
Huaxiao Metal provides certified MTR/MTC for every shipment, ensuring compliance and traceability.
Comparison with Other Alloys
| Alloy | Maximum Service Temp (°C) | Tensile Strength (MPa) | Corrosion Resistance | Cost |
|---|---|---|---|---|
| Inconel X-750 | 704 | 965 – 1170 | Excellent | High |
| Inconel 718 | 650 | 1035 – 1240 | Excellent | High |
| Inconel 625 | 982 | 827 – 1034 | Superior | High |
| 304 Stainless Steel | 870 | 505 – 690 | Moderate | Low |
| 316 Stainless Steel | 925 | 515 – 690 | Good | Low |
Inconel X750 offers superior high-temperature strength compared to stainless steels, and comparable strength to 718 with better stress-rupture performance.
Sourcing Inconel X-750 from Huaxiao Metal
Choosing the right supplier ensures product quality, traceability, and timely delivery. Huaxiao Metal provides:
ISO-certified Inconel X-750 with full MTC/MTR documentation
Flexible quantities: small-batch prototypes to large production runs
Custom dimensions and machining services
Expert guidance on heat treatment and fabrication
Global shipping and logistics support
Contact us today to request a quote and discuss your Inconel X-750 requirements.
FAQ
What is the main advantage of Inconel X-750 over other nickel-based superalloys?
Its high-temperature strength, creep resistance, and oxidation resistance make it ideal for critical aerospace and power generation applications.
Can Inconel X-750 withstand high-temperature oxidation?
Yes, it maintains structural integrity and oxidation resistance up to 1300°F (704°C).
Is Inconel X750 suitable for welding and machining?
Yes, with proper tooling, preheating, and cutting fluids, Inconel X750 can be welded and machined effectively.
Is Inconel X750 resistant to stress corrosion cracking?
Yes, especially after proper solution treatment and aging.
What are the international equivalents of Inconel X-750?
UNS N07750, DIN X750, JIS NCF750, AMS 5662.
How can I order Inconel X-750 from Huaxiao Metal?
You can contact our sales team via our website, request a quote, and specify dimensions, quantity, and heat treatment requirements.
Conclusion
Inconel X-750 stands out as a versatile, high-performance nickel-based superalloy for aerospace, power generation, and industrial applications. By sourcing from Huaxiao Metal, you gain access to certified materials, technical expertise, and global logistics support.
Ready to procure Inconel X-750? Contact Huaxiao Metal today to request a quote and ensure your project uses the highest quality superalloy available.
