INCONEL Alloy HX,Nickel-Chromium Alloy; Werkstoff Nr. 2.4665, SAE AMS 5536, ，1

### **Product Introduction: INCONEL® Alloy HX (Werkstoff Nr. 2.4665)** **INCONEL® Alloy HX** is a nickel-chromium-iron-molybdenum alloy specifically designed for exceptional strength and oxidation resistance at high temperatures. As a solid-solution strengthened, iron-nickel-base superalloy, it retains a significant portion of its room-temperature strength at temperatures up to 1200°C (2200°F). Its key characteristic is an outstanding balance of high thermal strength, excellent resistance to oxidation and carburization, and good fabricability. This alloy is particularly valued for its structural stability and resistance to the damaging effects of thermal cycling, making it a preferred material for high-temperature furnace components, industrial gas turbines, and other thermal processing equipment where long-term reliability under stress is paramount. --- ### **International Standards & Material Equivalents** INCONEL Alloy HX is covered by several key international specifications, with the provided AMS standard being a primary reference for aerospace applications. | Standard Type | Standard Number | Designation / Product Form | | :--- | :--- | :--- | | **Werkstoff Nr.** | **2.4665** | **2.4665** | | **SAE AMS (Aerospace)** | **5536** | Sheet, Strip, and Plate | | **UNS (USA)** | N06002 | Alloy HX | | **ASTM** | B435 | Plate, Sheet, and Strip | | **ASME** | SB-435 | Pressure Vessel Code Edition | | **DIN (Germany)** | 17742 | NiCr47FeMoW | > **Note:** INCONEL® is a registered trademark of Special Metals Corporation. The primary identifiers are **Werkstoff 2.4665** and **UNS N06002**. --- ### **Chemical Composition** The composition is balanced to provide solid-solution strength and form a stable, protective oxide scale. | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | 47.0 min. | | **Chromium (Cr)** | 20.5 - 23.0 | | **Iron (Fe)** | 17.0 - 20.0 | | **Molybdenum (Mo)** | 8.0 - 10.0 | | **Cobalt (Co)** | 0.50 - 2.50 | | **Tungsten (W)** | 0.20 - 1.00 | | **Carbon (C)** | 0.05 - 0.15 | | **Silicon (Si)** | 1.00 max. | | **Manganese (Mn)** | 1.00 max. | --- ### **Physical Properties** Alloy HX exhibits physical properties suitable for high-temperature and thermal cycling applications. | Property | Value | | :--- | :--- | | **Density** | 8.22 g/cm³ (0.297 lb/in³) | | **Melting Point** | 1355 °C (2475 °F) | | **Thermal Conductivity** | 12.3 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.18 μΩ·m (at 20°C) | | **Modulus of Elasticity** | 211 GPa (30.6 x 10⁶ psi) | | **Coefficient of Thermal Expansion** | 14.0 μm/m·°C (20-1000°C) | | **Magnetic Response** | Essentially non-magnetic | --- ### **Mechanical Properties (Typical for Annealed Condition - AMS 5536)** The alloy maintains good strength at elevated temperatures while retaining useful ductility. | Property | Value (Room Temperature, Annealed) | | :--- | :--- | | **Tensile Strength** | 724 MPa (105 ksi) | | **Yield Strength (0.2% Offset)** | 345 MPa (50 ksi) | | **Elongation** | 45% | | **Hardness (Rockwell B)** | 85 HRB | --- ### **Key Characteristics & Advantages** 1. **Excellent High-Temperature Strength:** Maintains high tensile, creep, and rupture strength at temperatures up to 1200°C (2200°F). 2. **Outstanding Oxidation Resistance:** The high chromium content provides excellent resistance to scaling and oxidation in air and other oxidizing atmospheres. 3. **Good Resistance to Carburizing and Sulfidizing Atmospheres:** Performs well in environments rich in carbon and sulfur, common in petrochemical and heat treatment applications. 4. **Excellent Thermal Fatigue Strength:** Withstands repeated heating and cooling cycles better than many other alloys due to its high strength and ductility. 5. **Good Fabricability and Weldability:** Can be readily formed and welded using standard techniques for high-temperature alloys. --- ### **Product Applications** INCONEL Alloy HX is specified for demanding high-temperature components across multiple industries. * **Thermal Processing:** * **Furnace radiant tubes,** muffles, and retorts * **Roller hearth furnace rollers** and annealing furnace components * Basket and fixtures for carburizing and nitriding * **Heat treatment trays and fixtures** * **Aerospace & Industrial Gas Turbines:** * **Combustion cans,** liners, and afterburner components * **Turbine seals** and ring sections * **Exhaust system components** * **Petrochemical Processing:** * **Steam methane reformer components** * **Ethylene furnace tubes** and other high-temperature piping * **Power Generation:** * **Heat exchangers** and superheater supports ### **Summary** **INCONEL Alloy HX (Werkstoff 2.4665)** is a versatile, solid-solution strengthened nickel-chromium alloy that provides an excellent combination of **high-temperature strength, outstanding oxidation resistance, and superior thermal fatigue resistance**. Governed by standards such as **SAE AMS 5536**, it remains a preferred material for critical high-temperature components in industrial furnaces, aerospace engines, and petrochemical processing equipment. Its balanced properties make it particularly valuable for applications requiring long-term structural stability and reliability under cyclic thermal stress and aggressive atmospheres.

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 3308 gallon liquid totes Special package is available on request.