Haynes 617 Nickel Alloy,Haynes 617 alloy，1

### **Introduction to Haynes® 617 (UNS N06617) Nickel-Based Superalloy** **Haynes® 617** is a nickel-chromium-cobalt-molybdenum alloy renowned for its exceptional combination of **high-temperature strength, outstanding oxidation resistance, and excellent carburization resistance**. It is a solid-solution strengthened alloy, meaning its properties are derived from the careful balancing of its alloying elements within a nickel matrix, rather than from precipitation hardening. This gives it excellent microstructural stability for long-term service at temperatures up to **2200°F (1200°C)**. Haynes 617 is a premier choice for the most demanding applications in aerospace and industrial gas turbines, where components must withstand extreme heat, pressure, and corrosive environments simultaneously. --- ### **Chemical Composition (Weight %, typical per AMS 5883)** The composition is a sophisticated blend of solid-solution strengtheners and oxide-scale formers. | Element | Minimum | Maximum | Key Function | | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | **Balance** | | Provides the stable austenitic matrix and overall high-temperature integrity. | | **Chromium (Cr)** | 20.0 | 24.0 | **Primary role:** Provides exceptional resistance to oxidation (scaling) and hot corrosion via the formation of a protective Cr₂O₃ scale. | | **Cobalt (Co)** | 10.0 | 15.0 | Provides solid-solution strengthening and enhances long-term thermal stability. | | **Molybdenum (Mo)** | 8.0 | 10.0 | A potent solid-solution strengthener, significantly increasing high-temperature creep strength. | | **Aluminum (Al)** | 0.8 | 1.5 | Forms a protective, tenacious sub-layer of Al₂O₃ beneath the chromia scale, drastically improving oxidation resistance. | | **Iron (Fe)** | - | 3.0 | Kept low to ensure microstructural stability and corrosion resistance. | | **Carbon (C)** | 0.05 | 0.15 | Contributes to strength through carbide formation at grain boundaries. | | **Titanium (Ti)** | - | 0.6 | - | | **Manganese (Mn)** | - | 1.0 | - | | **Silicon (Si)** | - | 1.0 | Enhances oxidation resistance. | | **Copper (Cu)** | - | 0.5 | - | | **Boron (B)** | 0.002 | 0.006 | Strengthens grain boundaries and improves creep ductility. | ***Key Differentiator:*** The synergistic combination of **Cr for oxidation resistance**, **Mo and Co for solid-solution strength**, and **Al for enhanced scale stability** is the foundation of its superior performance. --- ### **Physical Properties (Typical)** * **Density:** 8.36 g/cm³ (0.302 lb/in³) * **Melting Range:** 1330 - 1380 °C (2425 - 2515 °F) * **Thermal Expansion Coefficient:** 12.8 μm/m·°C (20-100°C) * **Thermal Conductivity:** 13.4 W/m·K at 100°C * **Modulus of Elasticity (Young's Modulus):** 211 GPa (30.6 x 10⁶ psi) at 21°C --- ### **Mechanical Properties (Typical at Room Temperature, Annealed)** * **Tensile Strength:** ≥ 710 MPa (103 ksi) * **Yield Strength (0.2% Offset):** ≥ 345 MPa (50 ksi) * **Elongation:** ≥ 35% ***High-Temperature Strength:*** Haynes 617 retains its strength remarkably well at elevated temperatures. Its 1000-hour rupture strength is approximately **100 MPa (14.5 ksi) at 1800°F (982°C)**, which is significantly better than many other solid-solution alloys like Alloy 625. --- ### **Key Characteristics and Product Applications** #### **Key Characteristics:** 1. **Exceptional Oxidation Resistance:** Capable of continuous service in air at temperatures up to 2200°F (1200°C) with very low metal wastage. 2. **Excellent Creep Rupture Strength:** Offers superior long-term, load-bearing capability at high temperatures, outperforming many competing solid-solution alloys. 3. **Thermal Stability:** Resists the formation of detrimental phases during long-term exposure, maintaining ductility and toughness. 4. **Good Fabricability and Weldability:** It can be formed and welded using standard techniques, though it requires care to avoid strain-age cracking. Post-weld heat treatment is often recommended. #### **Primary Applications:** Haynes 617 is a critical material in high-efficiency, high-temperature systems. * **Aerospace & Gas Turbine Engines:** * **Combustion Liners and Transition Ducts** * **Afterburner Components** * **Turbine Blades (for industrial turbines)** * **Ring Segments and Seals** * **Industrial Gas Turbines (IGT):** * **Combustors, Transition Pieces, and Hot Gas Path Components** * **Advanced Nuclear Reactors:** * A leading candidate for intermediate heat exchangers (IHX) in Very High-Temperature Gas-Cooled Reactors (VHTR) due to its strength and stability under helium coolant. * **Petrochemical Processing:** * Components in high-temperature reformers and furnace hardware. --- ### **International Standards** Haynes 617 is well-established and covered by major aerospace (AMS) and industrial (ASTM/ASME) standards. | Product Form | Standard | Designation | Notes | | :--- | :--- | :--- | :--- | | **Plate, Sheet, Strip** | **AMS 5883** | Alloy 617 | The primary aerospace specification for sheet and plate. | | **Bar, Forgings, Ring** | *Proprietary / AMS 5885* | Alloy 617 | Bar and forged shapes are commonly supplied to this specification. | | **Seamless Tube & Pipe** | ASTM B622 / ASME SB-622 | UNS N06617 | For seamless pipe and tube. | | **Plate, Sheet, Strip** | ASTM B168 / ASME SB-168 | UNS N06617 | Standard specification for plate, sheet, and strip. | | **Welding Consumables** | AWS A5.14 | **ERNiCrCoMo-1** | The matching composition filler metal for GTAW (TIG), GMAW (MIG), and SAW processes. | **Note:** "Haynes" is a registered trademark of **Haynes International, Inc.** Alloy 617 is also widely known as **INCONEL® Alloy 617** (a trademark of Special Metals Corporation). It is a premium, high-performance alloy whose use requires careful consideration of heat treatment and fabrication parameters. Consultation with the manufacturer for specific application engineering is highly recommended.

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 3263 gallon liquid totes Special package is available on request.