Nickelvac 625 Nickel Superalloy,UNS N06625; AMS 5666. EB 2949; ASTM B 444, B 446,E FORU

**Product Overview: Nickelvac® 625 Nickel Superalloy (UNS N06625)** **Nickelvac® 625** (UNS N06625) is a premium nickel-chromium-molybdenum-niobium superalloy renowned for its exceptional strength, outstanding corrosion resistance, and excellent fatigue and thermal fatigue properties. Conforming to AMS 5666, EB 2949, ASTM B444, and ASTM B446 standards, this solid-solution strengthened alloy demonstrates superior performance across a wide temperature range and in various corrosive environments, making it suitable for the most demanding aerospace, marine, and chemical processing applications. --- ### **Key Characteristics & Advantages** - **Exceptional Corrosion Resistance**: Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking - **High Strength Across Temperature Range**: Maintains mechanical properties from cryogenic to elevated temperatures - **Outstanding Fatigue Resistance**: Superior resistance to thermal and mechanical fatigue - **Excellent Oxidation Resistance**: Performs reliably in high-temperature oxidizing atmospheres up to 1100°C - **Good Fabricability**: Can be readily formed and welded using standard techniques - **Versatile Performance**: Suitable for both corrosion resistance and high-strength applications --- ### **Chemical Composition (Typical Weight %)** | Element | Content Range (%) | Function Description | |------------------|-------------------|-----------------------| | **Nickel (Ni)** | ≥58.0 | Base element providing matrix stability and corrosion resistance | | **Chromium (Cr)**| 20.0-23.0 | Primary element for oxidation and corrosion resistance | | **Molybdenum (Mo)**| 8.0-10.0 | Enhances pitting and crevice corrosion resistance | | **Niobium (Nb)** | 3.15-4.15 | Forms strengthening precipitates with carbon | | **Iron (Fe)** | ≤5.0 | Controlled impurity | | **Carbon (C)** | ≤0.10 | Optimized for strength and stability | | **Manganese (Mn)**| ≤0.50 | Improves hot workability | | **Silicon (Si)** | ≤0.50 | Enhances oxidation resistance | | **Aluminum (Al)**| ≤0.40 | Controlled for specific property requirements | | **Titanium (Ti)**| ≤0.40 | Optional strengthening element | --- ### **Physical Properties** | Property | Typical Value | Test Conditions | |---------------------------------|------------------------|--------------------------| | **Density** | 8.44 g/cm³ | At room temperature | | **Melting Range** | 1290-1350°C | Solidus-Liquidus | | **Thermal Expansion Coefficient**| 12.8 × 10⁻⁶/°C | 20-100°C range | | **Thermal Conductivity** | 9.8 W/m·K | At 100°C | | **Specific Heat Capacity** | 410 J/kg·K | At 100°C | | **Electrical Resistivity** | 1.28 μΩ·m | At 20°C | | **Young's Modulus** | 207 GPa | At room temperature | --- ### **Mechanical Properties** | Property | Temperature | Typical Value | |------------------------|-------------|----------------------| | **Tensile Strength** | 20°C | 827-1034 MPa | | **Tensile Strength** | 650°C | 690-827 MPa | | **Yield Strength (0.2%)** | 20°C | 414-758 MPa | | **Yield Strength (0.2%)** | 650°C | 345-586 MPa | | **Elongation** | 20°C | 30-55% | | **Elongation** | 650°C | 25-40% | | **Reduction of Area** | 20°C | 40-65% | --- ### **High-Temperature Performance** - **Maximum Continuous Service**: 1100°C (2012°F) - **Oxidation Resistance**: Excellent up to 1100°C in air - **Cyclic Oxidation**: Superior resistance to thermal cycling - **Creep Strength**: Excellent long-term stress rupture properties - **Chloride Stress Corrosion Cracking**: Outstanding resistance --- ### **International Standards & Specifications** Nickelvac® 625 complies with the following international standards: - **AMS 5666**: Nickel Alloy, Corrosion and Heat Resistant, Bars, Forgings, and Rings 62Ni - 21.5Cr - 9.0Mo - 3.65Cb - **EB 2949**: Engineering Standard for High-Strength Nickel Alloys - **ASTM B444**: Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy Pipe and Tube - **ASTM B446**: Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy Rod and Bar - **ASTM B443**: Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy Plate, Sheet, and Strip - **ASME SB-444**: Boiler and Pressure Vessel Code Specification - **NACE MR0175/ISO 15156**: Suitable for sour service applications --- ### **Applications** 1. **Aerospace Industry**: - Gas turbine engine components - Ducting systems and exhaust components - Engine mounting systems - thrust reverser components - Aircraft ducting systems 2. **Marine and Offshore**: - Propeller blades and submarine components - Subsea pipeline connections - Seawater heat exchangers - Offshore platform components 3. **Chemical Processing**: - Reactor vessels and heat exchangers - Piping systems for aggressive chemicals - Pollution control equipment - Flue gas desulfurization systems 4. **Oil and Gas Industry**: - Downhole instrumentation housings - Wellhead components - Christmas tree equipment - Pipeline scraper bars 5. **Nuclear Industry**: - Core component assemblies - Control rod mechanisms - Nuclear waste processing equipment - Reactor water cleanup systems --- ### **Fabrication Characteristics** - **Hot Working**: 1038-1177°C (1900-2150°F) with rapid cooling - **Cold Working**: Good ductility permits moderate cold forming - **Annealing**: 1038-1066°C (1900-1950°F) followed by rapid cooling - **Welding**: Excellent weldability using matching filler metals (ERNiCrMo-3) - **Machining**: Requires appropriate tools and techniques for high-strength nickel alloys --- ### **Available Forms** - **Bar and Rod**: Various diameters and lengths per ASTM B446 - **Pipe and Tube**: Seamless and welded varieties per ASTM B444 - **Plate and Sheet**: Multiple thicknesses and sizes per ASTM B443 - **Wire and Strip**: For specialized welding and electrical applications - **Fittings and Flanges**: Complete piping system components - **Forged Products**: Custom shapes for specific applications --- **Disclaimer**: *The information provided is for technical reference purposes only. Nickelvac® is a registered trademark and specialized nickel superalloy requiring proper processing and handling to achieve optimal performance. Actual properties may vary depending on manufacturing processes, heat treatment, and specific service conditions. Users should consult with qualified materials engineers and adhere to relevant industry standards and specifications for critical applications. Always refer to manufacturer's technical data sheets and applicable ASTM, AMS, and industry specifications for detailed requirements.*

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 3118 gallon liquid totes Special package is available on request.