Altemp HX Nickel-Based superalloy,UNS N06002，1

### **Product Datasheet: Altemp HX / HAYNES® 230® (UNS N06002)** **A Solid-Solution Strengthened Nickel-Chromium-Tungsten-Molybdenum Superalloy** --- #### **1. Overview** **Altemp HX**, standardized as **HAYNES 230® alloy**, is a versatile **solid-solution strengthened nickel-chromium-tungsten-molybdenum superalloy**. It is renowned for its exceptional combination of **high-temperature strength**, **outstanding oxidation resistance** up to 1150°C (2100°F), and excellent **long-term thermal stability**. Unlike precipitation-hardened alloys, 230 derives its strength directly from the severe lattice strain caused by the addition of large amounts of tungsten and molybdenum dissolved in the nickel-chromium matrix. This provides excellent microstructural stability over long periods of time at high temperatures. It also offers good fabricability and weldability. #### **2. Chemical Composition (Typical Weight %)** The composition is meticulously balanced for a protective chrome oxide scale and solid-solution strength. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance (~47-62) | Forms the austenitic matrix. | | **Chromium (Cr)** | ~20.0 - 24.0 | Provides exceptional oxidation and nitridation resistance. | | **Tungsten (W)** | ~13.0 - 15.0 | Primary solid solution strengthener. | | **Molybdenum (Mo)** | ~1.0 - 3.0 | Solid solution strengthener. | | **Iron (Fe)** | ≤ 3.0 | Residual element. | | **Cobalt (Co)** | ≤ 5.0 | Residual element; controlled to be low. | | **Manganese (Mn)** | ~0.30 - 1.00 | Aids in sulfur control and manufacturability. | | **Silicon (Si)** | ~0.25 - 0.75 | Enhances oxidation resistance. | | **Aluminum (Al)** | ~0.20 - 0.50 | Contributes to oxidation resistance via scale formation. | | **Carbon (C)** | ~0.05 - 0.15 | Forms stable carbides for grain boundary strength. | | **Lanthanum (La)** | ~0.005 - 0.050 | Dramatically improves the spallation resistance of the protective oxide scale. | | **Boron (B)** | ≤ 0.015 | Enhances creep ductility. | #### **3. Physical Properties (Typical)** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.97 g/cm³ (0.324 lb/in³) | | **Melting Range** | ~1300 - 1370 °C (~2370 - 2500 °F) | | **Thermal Expansion Coefficient** | ~12.9 μm/m·°C (20 - 540°C) | | **Thermal Conductivity** | ~11.5 W/m·K (at 100°C) | | **Modulus of Elasticity** | ~211 GPa (30.6 x 10⁶ psi) at 20°C | #### **4. Mechanical Properties (Typical for Annealed Condition)** **At Room Temperature:** * **Tensile Strength:** ≥ 760 MPa (110 ksi) * **Yield Strength (0.2% Offset):** ≥ 345 MPa (50 ksi) * **Elongation:** ≥ 40% **At Elevated Temperature (e.g., 980°C / 1800°F):** * **Tensile Strength:** ~125 MPa (18 ksi) *[Retains useful strength]*. * **Creep-Rupture Strength:** Excellent, with a proven capability for long-term service under stress at high temperatures. #### **5. Key Characteristics** * **Oxidation Resistance:** One of its standout features; superior to many other solid-solution alloys like 617 and 625. * **Thermal Stability:** Resists the formation of detrimental topologically close-packed (TCP) phases during long-term exposure. * **Fabricability:** Can be formed and welded using standard techniques. #### **6. Product Applications** HAYNES 230 is used in a wide range of extreme-temperature applications across various industries: * **Aerospace:** Combustion chamber liners, transition ducts, spray bars, turbine seals, and afterburner components. * **Industrial Gas Turbines:** Combustion cans, transition pieces, and ring segments. * **Heat Treatment Industry:** Furnace fixtures, radiant tubes, muffles, and heat-treating baskets. * **Chemical Processing:** Components for high-temperature reactors and heat exchangers. #### **7. International and Industry Standards** * **UNS:** **N06230** (Note: While historically known as N06002, the active and correct UNS designation is **N06230**) * **ASTM:** * **ASTM B435:** Sheet, Strip, and Plate * **ASTM B572:** Rod/Bar * **ASTM B619/B622:** Welded and Seamless Pipe & Tube * **ASME:** Approved for use in ASME Boiler and Pressure Vessel Code Section I (SB-435) and Section VIII. * **AMS:** **AMS 5878** (Plate, Sheet, and Strip) --- **Disclaimer:** The information provided herein is for reference purposes only. Properties can vary based on product form and size. "Altemp" is a trademark associated with high-temperature alloys. **HAYNES** and **HAYNES 230** are registered trademarks of Haynes International, Inc. For design and procurement, the official, latest issue of the relevant material specification and the manufacturer's technical data must be consulted.

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 3370 gallon liquid totes Special package is available on request.