Alloy N,Hastelloy N Foil,Shim,UNS N10003,E FORU

British Specs:，American Specs: AMS 5771 Bar and Forging AMS 5607 Sheet, Strip and Plate，German Specs:

### **Technical Datasheet: Alloy N (UNS N10003)** **Overview** Alloy N, also known by its trade name Hastelloy® N and the unified numbering system code UNS N10003, is a nickel-chromium-molybdenum alloy specifically developed for exceptional resistance to molten fluoride salts. Its primary development was for use in the Molten Salt Reactor Experiment (MSRE) by Oak Ridge National Laboratory. This alloy exhibits outstanding resistance to oxidation and corrosion at high temperatures, making it a premier material for demanding applications in the aerospace, nuclear, and chemical processing industries. **Key Characteristics** * **Exceptional Molten Salt Corrosion Resistance:** Superior performance in high-temperature molten fluoride environments. * **High-Temperature Strength:** Maintains excellent mechanical properties at elevated temperatures. * **Good Oxidation Resistance:** Resists scaling and degradation in oxidizing atmospheres up to 1175°C (2150°F). * **Fabricability:** Can be readily formed, machined, and welded using standard techniques for nickel-based alloys. --- ### **Chemical Composition (Weight % Typical)** The chemical composition of Alloy N / UNS N10003 is precisely controlled to ensure optimal performance. | Element | Percentage (%) | Primary Function | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance (~71%) | Base element providing austenitic structure and overall corrosion resistance. | | **Molybdenum (Mo)** | 16.0 - 18.0% | Enhances strength and resistance to reducing acids and pitting corrosion. | | **Chromium (Cr)** | 6.0 - 8.0% | Imparts resistance to oxidation and sulfidizing environments. | | **Iron (Fe)** | 5.0% max | Residual element, kept low to prevent detrimental phase formation. | | **Silicon (Si)** | 1.0% max | Deoxidizer in the melt, can form strengthening silicides. | | **Manganese (Mn)** | 0.8% max | Aids in hot workability and acts as a deoxidizer. | | **Copper (Cu)** | 0.35% max | Residual element. | | **Aluminum (Al)** | 0.5% max | Residual element. | | **Titanium (Ti)** | 1.0% max | Added for stabilization and to improve weldability. | | **Carbon (C)** | 0.06% - 0.12% | Enhances high-temperature strength through carbide formation. | | **Boron (B)** | 0.01% max | Improves creep ductility. | *Note: "Hastelloy" is a registered trademark of Haynes International Inc. UNS N10003 is the generic standard designation.* --- ### **Physical Properties (Typical at Room Temperature)** | Property | Value | | :--- | :--- | | **Density** | 8.86 g/cm³ (0.320 lb/in³) | | **Melting Point** | 1334 - 1360°C (2435 - 2480°F) | | **Specific Heat** | 448 J/kg·K (0.107 Btu/lb·°F) | | **Thermal Conductivity** | 12.2 W/m·K (84.7 Btu·in/hr·ft²·°F) | | **Coefficient of Thermal Expansion** | 12.4 μm/m·°C (6.9 μin/in·°F) from 20-100°C | | **Electrical Resistivity** | 1.25 μΩ·m | | **Magnetic Permeability** | Typically <1.005 (Effectively non-magnetic) | --- ### **Mechanical Properties (Typical)** **Room Temperature:** * **Tensile Strength:** 760 MPa (110 ksi) min * **Yield Strength (0.2% Offset):** 345 MPa (50 ksi) min * **Elongation (in 2 inches / 50 mm):** 35% min **Elevated Temperature (816°C / 1500°F):** * **Tensile Strength:** ~260 MPa (~38 ksi) * **0.2% Yield Strength:** ~165 MPa (~24 ksi) * **Creep-Rupture Strength:** Excellent resistance to creep deformation and stress rupture under high-temperature loads. --- ### **Product Forms & Applications** **1. Alloy N / Hastelloy N (General)** * **Forms:** Plate, sheet, bar, wire, tubing, pipe, fittings. * **Applications:** * **Nuclear Industry:** Core components, heat exchangers, and piping for molten salt reactors (MSRs). * **Chemical Processing:** Vessels, retorts, and piping for high-temperature processes involving catalysts and aggressive chemicals. * **Aerospace:** High-temperature structural components. **2. Hastelloy N Foil** * **Description:** Very thin sheets of alloy, typically less than 0.1 mm (0.004 inches) thick. * **Applications:** * **Gaskets & Seals:** Used in high-temperature, corrosive environments where flexibility is required. * **Thermal Management:** As a heat shield or radiation shield in vacuum furnaces and aerospace systems. * **Laboratory Equipment:** Lining, sample containment, and diffusion barriers. **3. Hastelloy N Shim** * **Description:** Thin sheets or strips used for spacing, aligning, or adjusting gaps between components. Thicker than foil, typically up to a few millimeters. * **Applications:** * **Precision Alignment:** In pumps, valves, and turbines to set precise clearances. * **High-Temperature Furnace Fixturing:** For setting and supporting components during heat treatment. * **Compensating for Wear:** In corrosive machinery to maintain optimal operational tolerances. --- ### **International Standards** Alloy N / UNS N10003 is covered by various international standards for different product forms. | Standard Organization | Standard Number | Description | | :--- | :--- | :--- | | **ASTM International** | ASTM B335 | Standard Specification for Nickel-Molybdenum Alloy Rod & Bar | | **ASTM International** | ASTM B336 | Standard Specification for Nickel-Molybdenum Alloy Pipe & Tube | | **ASTM International** | ASTM B366 | Standard Specification for Factory-Made Wrought Nickel Alloy Fittings | | **ASTM International** | ASTM B572 | Standard Specification for UNS N10003 Rod (Specific to this alloy) | | **ASME (American Society of Mechanical Engineers)** | ASME SB-335
ASME SB-336
ASME SB-572 | Equivalent to ASTM standards for code-approved construction (e.g., pressure vessels). | | **SAE International** | AMS 5599 | Aerospace Material Specification for Sheet, Strip, and Plate | | **UNS (Unified Numbering System)** | UNS N10003 | The universal designation for this specific alloy composition. | | **ISO (International Organization for Standardization)**| **(Under Ni-base alloy group)** | Often specified by chemical and mechanical requirements rather than a single ISO number. | --- **Disclaimer:** This information is for reference purposes only. Material properties can vary based on manufacturing process, heat treatment, and product form. For critical applications, always consult the relevant material standard and the manufacturer's certified test reports. "Hastelloy" is a registered trademark of Haynes International.

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 2883 gallon liquid totes Special package is available on request.