Alloy X750，Inconel X750 Bar(Round bar, Flat bar)，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 Bar (Round Bar, Flat Bar) UNS N07750** #### **Overview** **Alloy X-750 Bar** (commercially known as **Inconel® X-750 Bar**) is a precipitation-hardenable nickel-chromium alloy available in both round bar and flat bar configurations, offering an excellent combination of high strength, good corrosion resistance, and outstanding oxidation resistance up to 700°C (1300°F). This age-hardenable superalloy maintains superior mechanical properties under high-temperature conditions and provides excellent creep rupture strength, making it suitable for aerospace, nuclear, and industrial applications requiring reliable performance in demanding environments. The bar products are manufactured through controlled thermo-mechanical processing and precise heat treatments to ensure uniform microstructure, consistent mechanical properties, and reliable performance in critical applications. --- #### **Chemical Composition** The chemical composition of Alloy X-750 Bar (UNS N07750) is carefully balanced for optimal performance: | 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** Critical properties for design and manufacturing engineering: | 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** Enhanced mechanical properties achieved through optimized 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 Performance:** * **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 Bar conforms to several international specifications: **Aerospace Material Specifications:** * **AMS 5668:** Bars, forgings, and rings * **AMS 5670:** Springs and spring washers * **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** **Round Bar Applications:** * **Aerospace:** Turbine shafts, engine mounts, landing gear components * **Nuclear:** Control rod mechanisms, reactor core components * **Power Generation:** Turbine blades, generator shafts, nuclear reactor components * **Industrial:** High-strength fasteners, precision shafts, hydraulic components **Flat Bar Applications:** * **Structural Components:** Support brackets, machine frames, structural reinforcements * **Tooling:** Fixtures, jigs, and molds for high-temperature processing * **Spring Components:** Flat spring elements, retainer clips * **Electrical:** High-temperature electrical components, support structures **Specialized Applications:** * **Fastener Manufacturing:** High-temperature bolts, studs, and special threaded components * **Machined Components:** Pump shafts, valve bodies, bearing housings * **Welding Applications:** Base material for fabrication of high-temperature equipment --- #### **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 Machinability:** Better machining characteristics in annealed condition * **Age Hardenable:** Can be heat treated to various strength levels * **Versatile Fabrication:** Suitable for machining, welding, and forming operations * **Reliable Performance:** Proven track record in critical applications **Available Forms & Sizes:** * **Round Bar Diameters:** 5mm to 400mm (0.187" to 16") * **Flat Bar Sizes:** Thickness 5mm to 150mm (0.187" to 6"), Width up to 600mm (24") * **Surface Conditions:** Hot finished, turned, ground, or precision machined **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:** * **Ultrasonic Testing:** Detection of internal defects * **Chemical Analysis:** Complete composition verification * **Mechanical Testing:** Tensile, impact, and hardness testing * **Microstructural Examination:** Grain size and phase distribution analysis **Note:** *Inconel® is a registered trademark of Special Metals Corporation. Alloy X-750 bars are typically supplied in the solution annealed condition for optimum machinability and formability, with subsequent aging treatment to develop high mechanical properties. The alloy demonstrates good weldability but requires proper post-weld heat treatment to restore properties in the heat-affected zone. Comprehensive material certification including chemical analysis and mechanical properties is 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 1821 gallon liquid totes Special package is available on request.