Alloy X750，Inconel X750 ，UNS N07750，EFORU

British Specs:，American Specs:AMS 5542 Sheet, Strip and Plate AMS 5582 Seamless Tube AMS 5583 Seamless Tube AMS 5747 Bar and Forgings AMS 5779 Welding Electrodes AMS 5598 Sheet, Strip and Plate AMS 5667 Bar and Forgings AMS 5668 Bar and Forgings AMS 5669 Bar AMS 5670 Bar and Forgings AMS 5671 Bar and Forgings AMS 5698 Wire AMS 5699 Wire，German Specs:WS 2.4669

### **Product Introduction: Alloy X-750 / Inconel X-750 (UNS N07750)** #### **Overview** **Alloy X-750** (commercially known as **Inconel® X-750**) is a precipitation-hardenable nickel-chromium alloy known for its excellent combination of high strength, good corrosion resistance, and oxidation resistance up to 700°C (1300°F). This age-hardenable superalloy maintains its properties under high-temperature conditions and offers good creep rupture strength, making it suitable for aerospace, nuclear, and industrial applications. The alloy can be readily formed and welded in the annealed condition and subsequently heat treated to achieve high mechanical properties. --- #### **Chemical Composition** The chemical composition of Alloy X-750 (UNS N07750) is specified as follows: | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | 70.0 min | | **Chromium (Cr)** | 14.0 - 17.0 | | **Iron (Fe)** | 5.0 - 9.0 | | **Titanium (Ti)** | 2.25 - 2.75 | | **Copper (Cu)** | 0.50 max | | **Aluminum (Al)** | 0.40 - 1.00 | | **Niobium (Nb)** | 0.70 - 1.20 | | **Carbon (C)** | 0.08 max | | **Manganese (Mn)** | 1.00 max | | **Silicon (Si)** | 0.50 max | | **Sulfur (S)** | 0.01 max | *The alloy is strengthened by precipitation of gamma prime [γ'-Ni₃(Al,Ti)] phase during aging treatment.* --- #### **Physical Properties** Typical physical properties of Alloy X-750: | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | **Density** | 8.28 g/cm³ | 0.298 lb/in³ | | **Melting Range** | 1390 - 1430 °C | 2530 - 2600 °F | | **Specific Heat (20°C)** | 431 J/kg·K | 0.103 Btu/lb·°F | | **Thermal Conductivity (20°C)** | 11.8 W/m·K | 81.9 Btu·in/hr·ft²·°F | | **Thermal Expansion Coefficient (20-100°C)** | 12.8 μm/m·°C | 7.1 μin/in·°F | | **Modulus of Elasticity** | 214 GPa | 31.0 x 10⁶ psi | | **Electrical Resistivity** | 1.22 μΩ·m | - | --- #### **Mechanical Properties** Typical mechanical properties after standard heat treatment: **Solution Annealed + Aged Condition (AMS 5668):** * **Ultimate Tensile Strength:** 1030-1240 MPa (150-180 ksi) * **Yield Strength (0.2% Offset):** 690-860 MPa (100-125 ksi) * **Elongation:** 15-25% * **Reduction of Area:** 25-35% * **Hardness:** 32-40 HRC **Elevated Temperature Properties:** * **0.2% Yield Strength at 650°C (1200°F):** ≥ 620 MPa (90 ksi) * **Stress Rupture Life at 700°C (1300°F):** ≥ 100 hours at 170 MPa (25 ksi) * **Creep Resistance:** Good up to 700°C (1300°F) --- #### **International Standards** Alloy X-750 is covered by numerous international specifications: **Aerospace Material Specifications (AMS):** * **AMS 5668:** Bars, forgings, and rings * **AMS 5670:** Springs and spring washers * **AMS 5671:** High-strength springs * **AMS 5542:** Sheet, strip, and plate **ASTM Standards:** * **ASTM B637:** Precipitation-hardening nickel alloy bars, forgings, and forging stock * **ASTM B637:** Rods, bars, and forgings **Other International Standards:** * **ISO 9724:** Nickel and nickel alloy forgings * **DIN 17752:** Wrought nickel and nickel alloys * **GB/T 14992:** Chinese standard for superalloys --- #### **Product Applications** Alloy X-750 serves in critical high-temperature applications across various industries: **Aerospace Industry:** * **Gas Turbine Engine Components:** Turbine blades, disks, seals, and spacers * **Rocket Engine Parts:** Thrust chambers, turbopump components * **Aircraft Structural Components:** Fasteners, springs, and high-strength bolts **Nuclear Industry:** * **Nuclear Reactor Components:** Core support structures, control rod mechanisms * **Reactor Vessel Internals:** Bolting, springs, and fastening systems * **Nuclear Fuel Assembly Components:** Spacers, springs, and support structures **Industrial Applications:** * **Gas Turbine Components:** Blades, vanes, and turbine wheels * **Heat Treatment Equipment:** Fixtures, baskets, and trays * **Spring Applications:** High-temperature springs and bellows * **Fasteners:** High-strength bolts, nuts, and studs **Specialized Applications:** * **Test Equipment:** High-temperature test fixtures and components * **Chemical Processing:** Components requiring corrosion resistance and strength * **Power Generation:** Turbine components and fastening systems --- #### **Key Advantages** * **High Strength at Elevated Temperatures:** Maintains mechanical properties up to 700°C (1300°F) * **Excellent Creep Resistance:** Good stress rupture properties * **Good Oxidation Resistance:** Resists scaling and oxidation at high temperatures * **Corrosion Resistance:** Good resistance to various corrosive environments * **Good Fabricability:** Can be formed and welded in annealed condition * **Age Hardenable:** Can be heat treated to various strength levels * **Reliable Performance:** Proven track record in critical applications **Heat Treatment Specifications:** * **Solution Treatment:** 1150-1200°C (2100-2200°F) followed by rapid cooling * **Aging Treatment:** 705-730°C (1300-1350°F) for 16-20 hours, air cool * **Double Aging:** Optional second aging at 650°C (1200°F) for enhanced properties **Quality Assurance:** * **Chemical Analysis:** Complete composition verification * **Mechanical Testing:** Tensile, hardness, and impact testing * **Microstructural Examination:** Grain size and phase distribution analysis * **Non-Destructive Testing:** UT, PT, MT as required **Note:** *Inconel® is a registered trademark of Special Metals Corporation. Alloy X-750 requires specific heat treatment cycles to achieve optimal properties. The material demonstrates good weldability but requires proper post-weld heat treatment. Comprehensive material certification including chemical analysis and mechanical properties is typically provided for critical applications.*

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1819 gallon liquid totes Special package is available on request.