AL 200™ Nickel Alloy, UNS N02200,DIN 2.4066, ASTM B-162; 1

### **Product Datasheet: AL 200™ / Nickel 200 (UNS N02200)** **A Commercially Pure Wrought Nickel for Superior Corrosion Resistance and Electrical Applications** --- #### **1. Overview** **AL 200™**, more commonly known as **Nickel 200** or **Alloy 200**, is a commercially pure wrought nickel (99.6% minimum). It is characterized by its excellent **corrosion resistance**, high **thermal and electrical conductivity**, and good **magnetic and magnetostrictive properties**. As a solid-solution alloy, it offers useful mechanical properties over a wide temperature range and maintains good ductility and stability down to cryogenic temperatures. Its high corrosion resistance is particularly effective against caustic alkalis, making it a benchmark material for handling sodium hydroxide (caustic soda). It is generally recommended for service temperatures below 315°C (600°F) to avoid embrittlement caused by graphite formation. #### **2. Chemical Composition (Typical Weight %)** The composition emphasizes high purity nickel with controlled carbon content. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | ≥ 99.0 | Provides the fundamental matrix for corrosion resistance, ductility, and conductivity. | | **Copper (Cu)** | ≤ 0.25 | Residual element. | | **Iron (Fe)** | ≤ 0.40 | Residual element; kept low to maintain corrosion resistance. | | **Manganese (Mn)** | ≤ 0.35 | Aids in sulfur control and manufacturability. | | **Carbon (C)** | ≤ 0.15 | Controlled to prevent graphitization and embrittlement at high temperatures. | | **Silicon (Si)** | ≤ 0.35 | Residual element. | | **Sulfur (S)** | ≤ 0.01 | Residual element, kept very low to improve hot workability. | #### **3. Physical Properties (Typical)** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.89 g/cm³ (0.321 lb/in³) | | **Melting Point** | 1435-1445 °C (2615-2635 °F) | | **Thermal Expansion Coefficient** | ~13.3 μm/m·°C (20 - 100°C) | | **Thermal Conductivity** | ~70 W/m·K (at 100°C) | *[High]* | | **Electrical Resistivity** | ~0.096 μΩ·m | | **Modulus of Elasticity** | ~204 GPa (30 x 10⁶ psi) at 20°C | | **Magnetic Properties** | Essentially non-magnetic (< 1.01 μ) at 25°C in annealed state. | #### **4. Mechanical Properties (Typical for Annealed Condition)** **At Room Temperature:** * **Tensile Strength:** 380 - 485 MPa (55 - 70 ksi) * **Yield Strength (0.2% Offset):** 103 - 345 MPa (15 - 50 ksi) * **Elongation:** ≥ 40% **At Cryogenic Temperature:** * Retains excellent ductility and toughness. #### **5. Corrosion Resistance & Key Characteristics** * **Caustic Alkalis:** Outstanding resistance to all concentrations of sodium hydroxide (NaOH) and potassium hydroxide (KOH) up to the boiling point. This is its primary application area. * **Neutral & Alkaline Salts:** Excellent resistance. * **Acids:** Good resistance to dilute hydrochloric and sulfuric acids. Excellent resistance to fluorine, chlorine, and their derivatives at room temperature. * **Gases:** Resists dry chlorine and hydrogen chloride at elevated temperatures. * **Food & Pharmaceutical:** Non-toxic and non-contaminating, making it suitable for food processing. #### **6. Product Applications** Nickel 200 is used across a wide range of industries due to its unique combination of properties: * **Chemical Processing:** Caustic soda (NaOH) evaporators, reaction vessels, distillation towers, and transfer piping for halogen and fluorine-based chemicals. * **Food & Synthetic Fiber Processing:** Equipment where product purity is critical. * **Electronics & Aerospace:** Magnetostrictive devices, radar components, and electron tubes. * **Electrical Engineering:** Anodes, cathodes, and other components requiring high electrical and thermal conductivity. * **Marine & Offshore:** Boat shafting and propeller blades for fishing vessels. #### **7. International and Industry Standards** Nickel 200 is covered by a comprehensive set of international standards. * **UNS:** **N02200** * **DIN / Werkstoff Nr.:** **2.4066** * **ASTM Standards (U.S.):** * **ASTM B-162:** Standard Specification for Nickel Plate, Sheet, and Strip. * **ASTM B-160:** Standard Specification for Nickel Rod and Bar. * **ASTM B-161:** Standard Specification for Nickel Seamless Pipe and Tube. * **ASTM B-366:** Standard Specification for Factory-Made Wrought Nickel and Nickel Alloy Fittings. * **ASME Standards (U.S.):** * **ASME SB-162:** Plate, Sheet, and Strip (for pressure vessel construction). * **ASME SB-160, SB-161, SB-366** (Equivalent to the ASTM standards for ASME code use). * **ISO:** ISO 6208 (Wrought Nickel and Nickel Alloys - Plate, Sheet and Strip). --- **Disclaimer:** The information provided herein is for reference purposes only. Properties can vary based on product form, size, and manufacturing process. Corrosion resistance is dependent on specific environmental conditions. **Note:** For service temperatures above 315°C (600°F), the low-carbon version, **Nickel 201 (UNS N02201)**, is recommended to prevent embrittlement. For design and procurement, the official, latest issue of the relevant material specification must be consulted. "AL 200" and "Nickel 200" are trademarks of Huntington Alloys, a subsidiary of Special Metals Corporation.

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 3375 gallon liquid totes Special package is available on request.