Nickelvac H-N Nickel Superalloy,UNS N10003; AMS 5771. ASTM B 434, B 573,E FORU

### **Product Introduction: Nickelvac® H-N Nickel-Based Superalloy (UNS N10003)** **Nickelvac H-N** is a nickel-molybdenum-chromium superalloy specifically designed for exceptional resistance to reducing and oxidizing corrosive environments. It exhibits outstanding performance in the presence of hot contaminated mineral acids, acid sulfates, and other aggressive chemical media. While often categorized for its corrosion resistance, its ability to maintain strength and stability at elevated temperatures also qualifies it as a versatile superalloy for demanding industrial applications. This alloy is part of the Hastelloy®-type family of materials and is known for its excellent fabricability and weldability, making it suitable for constructing complex process equipment like heat exchangers, reactors, and piping systems. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of Nickelvac H-N per AMS 5771 and ASTM standards is as follows: | Element | Content (%) | Element | Content (%) | | :--- | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | **Iron (Fe)** | ≤ 3.00 | | **Molybdenum (Mo)** | 26.0 - 30.0 | **Silicon (Si)** | ≤ 0.10 | | **Chromium (Cr)** | 6.00 - 8.00 | **Manganese (Mn)** | ≤ 1.00 | | **Cobalt (Co)** | ≤ 2.50* | **Carbon (C)** | ≤ 0.05 | | **Tungsten (W)** | ≤ 1.00 | **Sulfur (S)** | ≤ 0.03 | | **Vanadium (V)** | ≤ 0.40 | **Phosphorus (P)** | ≤ 0.04 | *Cobalt is typically controlled to a low level. **Key Microstructure:** The alloy's resistance is provided by its solid-solution strengthened, face-centered cubic (FCC) nickel-molybdenum-chromium matrix. The high molybdenum content confers resistance to reducing acids, while the chromium content provides resistance to oxidizing media. --- #### **2. Physical Properties** Typical physical properties for Nickelvac H-N alloy are provided below. | Property | Metric Units | Imperial Units | | :--- | :--- | :--- | | **Density** | 8.94 g/cm³ | 0.323 lb/in³ | | **Melting Range** | ~1330 - 1380 °C | ~2425 - 2515 °F | | **Specific Heat (20°C)** | 427 J/kg·K | 0.102 Btu/lb·°F | | **Thermal Conductivity (20°C)** | 10.8 W/m·K | 75 Btu·in/hr·ft²·°F | | **Mean Coefficient of Thermal Expansion (20-100°C)** | 11.5 μm/m·°C | 6.4 μin/in·°F | | **Modulus of Elasticity (Tensile)** | 217 GPa | 31.5 x 10⁶ psi | | **Electrical Resistivity** | 1.35 μΩ·m | - | --- #### **3. Mechanical Properties (Typical for AMS 5771 - Sheet, Strip & Plate)** Mechanical properties are typically given for material in the solution annealed condition. **Standard Condition:** Solution Annealed **Typical Room Temperature Mechanical Properties:** | Property | Value (Typical) | | :--- | :--- | | **Tensile Strength** | 800 MPa (116 ksi) min | | **Yield Strength (0.2% Offset)** | 380 MPa (55 ksi) min | | **Elongation** | 45% min | *Note: These are typical minimum values per AMS 5771; actual properties can vary with product form and size.* --- #### **4. International Standards & Specifications** Nickelvac H-N is covered by key specifications for its primary product forms. **Primary Specifications:** * **UNS:** N10003 * **AMS:** **AMS 5771**: Sheet, Strip, and Plate; Corrosion and Heat-Resistant, 62Ni - 28Mo - 6Cr (H-N Alloy) Solution Annealed. * **ASTM:** * **ASTM B434**: Standard Specification for Plate and Strip, Nickel-Molybdenum-Chromium Alloy (UNS N10003). * **ASTM B573**: Standard Specification for Welding Rods, Nickel-Molybdenum-Chromium Alloy (UNS N10003). **Other Standards:** * **ASME:** SB-434 (For pressure vessel and component construction) * **ISO:** Not as widely standardized under a common ISO number as some other alloys; it is typically referenced by UNS N10003 or proprietary trade names. --- #### **5. Product Applications** Nickelvac H-N's primary application is in highly corrosive industrial processing environments. * **Chemical Process Industry:** * Heat exchangers and condensers for sulfuric, phosphoric, and hydrochloric acid service. * Reactors, distillation columns, and piping systems. * Components exposed to acid chlorides and other contaminated acidic media. * **Pollution Control:** * Flue gas desulfurization (FGD) systems components. * Scrubbers and ducting for handling hot, contaminated gases. * **Pharmaceutical & Fine Chemical Industries:** * Equipment requiring high purity and resistance to cleaning agents and process streams. * **Pulp & Paper Industry:** * Digesters and other equipment in corrosive pulping environments. --- #### **Summary of Key Advantages** * **Exceptional Corrosion Resistance:** Outstanding resistance to a wide range of reducing acids (e.g., sulfuric, hydrochloric, phosphoric) and good resistance to oxidizing conditions. * **Versatility:** Performs well in environments containing mixed acids and acid salts where halides (like chlorides) may be present. * **Excellent Fabricability:** Can be formed and welded using standard techniques for nickel alloys, allowing for the construction of complex equipment. * **High-Temperature Stability:** Maintains good mechanical properties and corrosion resistance at elevated temperatures. **Disclaimer:** The information provided here is for reference purposes. Specific properties and performance are dependent on the manufacturing process, heat treatment, and final product form. For critical applications, especially in corrosive environments, always consult the official material specifications and the alloy producer's data sheets.

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 3131 gallon liquid totes Special package is available on request.