617 Severe Corrosion and Heat Resistant Alloy,UNS N06617; 1

### **Product Introduction: INCONEL® alloy 617 (UNS N06617) Severe Corrosion and Heat Resistant Alloy** **Overview** INCONEL® alloy 617 is a nickel-chromium-cobalt-molybdenum alloy renowned for its exceptional combination of high-temperature strength, outstanding oxidation resistance, and excellent resistance to a wide range of corrosive environments. It is a solid-solution strengthened alloy that maintains its mechanical integrity at temperatures up to 1100°C (2000°F). A key characteristic of alloy 617 is its unique ability to withstand the demanding conditions of advanced energy systems, including very high temperatures and high-pressure helium, making it a critical material for next-generation power generation and aerospace applications. --- #### **Chemical Composition (Typical % by Weight)** The sophisticated composition of INCONEL 617 is the foundation of its superior high-temperature capabilities. | Element | Content (%) | Role & Benefit | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Forms the stable austenitic matrix, providing the fundamental basis for high-temperature strength and metallurgical stability. | | **Chromium (Cr)** | 20.0 - 24.0 | Imparts exceptional resistance to oxidation, nitridation, and sulfidation by forming a protective chromium oxide (Cr₂O₃) scale. | | **Cobalt (Co)** | 10.0 - 15.0 | A vital solid-solution strengthener that significantly enhances high-temperature creep strength and structural stability. | | **Molybdenum (Mo)** | 8.0 - 10.0 | Provides solid-solution strengthening and enhances resistance to reducing acids and localized corrosion. | | **Aluminum (Al)** | 0.8 - 1.5 | A critical addition. It forms a tenacious, protective alumina (Al₂O₃) sub-scale beneath the chromia layer, which is essential for long-term oxidation resistance at the highest service temperatures. | | **Iron (Fe)** | 3.0 max | Kept at a low level to optimize high-temperature corrosion resistance and phase stability. | | **Carbon (C)** | 0.05 - 0.15 | Controlled content provides strengthening through carbide formation, enhancing creep rupture strength. | | **Manganese (Mn)**| 1.00 max | Aids in manufacturability. | | **Silicon (Si)** | 1.00 max | Enhances resistance to oxidation and carburization. | | **Titanium (Ti)** | 0.60 max | Contributes to strengthening through gamma prime formation and helps stabilize the carbon content. | | **Copper (Cu)** | 0.50 max | A residual element. | | **Boron (B)** | 0.006 max | Added to improve creep ductility and strength. | *Note: "INCONEL" is a registered trademark of Special Metals Corporation, a subsidiary of Haynes International Inc.* --- #### **Physical & Mechanical Properties (Typical)** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.36 g/cm³ (0.302 lb/in³) | | **Melting Range** | 1330 - 1380 °C (2425 - 2510 °F) | | **Specific Heat** | 420 J/kg·K (0.100 BTU/lb·°F) @ 20°C | | **Thermal Conductivity**| 13.5 W/m·K (93.5 BTU·in/hr·ft²·°F) @ 100°C | | **Thermal Expansion** | 11.8 μm/m·°C (6.6 μin/in·°F) @ 20-100°C | | **Tensile Strength (Room Temp)** | 655 MPa (95 ksi) min | | **Yield Strength (0.2% Offset, Room Temp)** | 240 MPa (35 ksi) min | | **Elongation (Room Temp)** | 35% min | --- #### **International Standards and Specifications** INCONEL 617 is covered by several key international standards for wrought products. * **ASTM B168:** Standard Specification for Nickel-Chromium-Iron Alloy (UNS N06617) Plate, Sheet, and Strip. * **ASTM B166:** Standard Specification for Nickel-Chromium-Iron Alloy (UNS N06617) Rod, Bar, and Wire. * **ASTM B167:** Standard Specification for Nickel-Chromium-Iron Alloy (UNS N06617) Seamless Pipe and Tube. * **ASME SB-168 / SB-166 / SB-167:** Approved for use in ASME Boiler and Pressure Vessel Code applications, including Section III for nuclear components. * **AMS 5887:** Aerospace Material Specification for bar and wire. * **UNS N06617:** Unified Numbering System designation. * **DIN 2.4663:** The corresponding material number in the German standard. --- #### **Product Applications** INCONEL alloy 617 is a cornerstone material for the most technologically advanced high-temperature systems. 1. **Advanced Power Generation:** * Combustion cans, transition ducts, and turbine components in industrial gas turbines. * Heat exchangers for High-Temperature Gas-Cooled Reactors (HTGRs) and Next-Generation Nuclear Plants (NGNP). * Tubing and headers for ultra-supercritical coal-fired boilers. 2. **Aerospace & Rocket Propulsion:** * Combustion chambers, liners, and afterburner components in aircraft engines. * Nozzles and manifolds in rocket engines. 3. **Industrial Furnaces & Heat Treating:** * Radiant tubes, muffles, and retorts for high-temperature furnaces. * Heat treatment fixtures and baskets for use in carburizing atmospheres. 4. **Chemical Process Industry:** * Components in processes involving catalytic reforming and production of synthesis gas. #### **Key Advantages** * **Exceptional High-Temperature Strength:** Offers excellent creep and rupture strength at temperatures up to 1100°C (2000°F), one of the highest capabilities among solid-solution alloys. * **Outstanding Oxidation Resistance:** The synergistic effect of chromium and aluminum provides superior protection against scaling and spallation in cyclic high-temperature service. * **Excellent Thermal Stability:** Resists the formation of detrimental phases, maintaining ductility and toughness after long-term exposure to high temperatures. * **Versatile Corrosion Resistance:** Good resistance to a wide range of corrosive media, including both oxidizing and reducing environments. **Conclusion** INCONEL® alloy 617 (UNS N06617) is a premier, solid-solution strengthened superalloy designed for the most extreme thermal and mechanical environments. Its unique composition, featuring a balance of chromium, cobalt, molybdenum, and aluminum, delivers an unparalleled combination of high-temperature strength, oxidation resistance, and long-term stability. As a key enabler for advanced energy and propulsion technologies, alloy 617 offers a proven and reliable solution, fully backed by major international standards like ASTM, ASME, and AMS.

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 3400 gallon liquid totes Special package is available on request.