Alloy 200，Nickel 200 ，UNS N02200，EFORU

British Specs:BS 3072 BS 3073 BS 3074 BS 3075 BS 3076 NA12，American Specs:ASTM B162 ASTM B163 ASTM B725 ASTM B730，German Specs:WS 2.4060 WS 2.4066

### **Technical Datasheet: Nickel 200 (Alloy 200 / UNS N02200)** #### **1. Introduction** Nickel 200 (commonly known as Alloy 200, and standardized as UNS N02200) is a commercially pure wrought nickel (99.6% minimum). It is a solid-solution alloy that possesses excellent mechanical properties and high thermal and electrical conductivity. Its outstanding corrosion resistance in a wide range of reducing and neutral environments makes it a versatile material for demanding applications in the chemical processing, aerospace, and electrical industries. The alloy is characterized by its good low-temperature performance, resistance to caustic alkalis, and high resistance to various forms of corrosion, including chloride-induced stress corrosion cracking. **Note on High-Temperature Use:** For service temperatures above 315°C (600°F), **Nickel 201 (UNS N02201)** is the preferred grade. Nickel 201 has a lower carbon content (0.02% max), which prevents the embrittlement caused by grain-boundary carbide precipitation that can occur in Nickel 200 at elevated temperatures. #### **2. Chemical Composition (Typical % Weight)** The chemical composition of Nickel 200 conforms to the following standard limits: | Element | Content (%) (ASTM B160) | Content (%) (Typical) | | :--- | :--- | :--- | | **Nickel (Ni)** | 99.0 min | ≥ 99.6 | | **Carbon (C)** | 0.15 max | 0.08 | | **Manganese (Mn)** | 0.35 max | 0.20 | | **Iron (Fe)** | 0.40 max | 0.20 | | **Copper (Cu)** | 0.25 max | 0.15 | | **Silicon (Si)** | 0.35 max | 0.15 | | **Sulfur (S)** | 0.01 max | 0.005 | #### **3. Physical Properties** | Property | Metric Unit | Imperial Unit | | :--- | :--- | :--- | | **Density** | 8.89 g/cm³ | 0.321 lb/in³ | | **Melting Point** | 1435-1445 °C | 2615-2633 °F | | **Thermal Conductivity** (at 25°C) | 70 W/m·K | 485 BTU·in/hr·ft²·°F | | **Electrical Resistivity** | 0.095 µΩ·m | 36.5 µΩ·in | | **Modulus of Elasticity** | 186 GPa | 27 x 10⁶ psi | | **Thermal Expansion Coefficient** (20-100°C) | 13.3 µm/m·°C | 7.4 x 10⁻⁶ in/in·°F | #### **4. Mechanical Properties (Typical at Room Temperature)** The mechanical properties vary with the product form and temper. **Sheet & Strip (Annealed Condition)** * **Tensile Strength:** 380 - 550 MPa (55 - 80 ksi) * **Yield Strength (0.2% Offset):** 105 - 245 MPa (15 - 35 ksi) * **Elongation (in 2 inches):** 40 - 55% **Rod & Bar (Annealed Condition)** * **Tensile Strength:** 460 - 620 MPa (67 - 90 ksi) * **Yield Strength (0.2% Offset):** 150 - 310 MPa (22 - 45 ksi) * **Elongation:** 40 - 50% #### **5. International Standards** Nickel 200 is covered by a wide range of international specifications, depending on the product form. | Product Form | ASTM Standard | ASME Standard | UNS | EN/DIN Standard | | :--- | :--- | :--- | :--- | :--- | | **Plate, Sheet & Strip** | ASTM B162 | SB-162 | N02200 | Ni 99.2 (2.4066) | | **Rod & Bar** | ASTM B160 | SB-160 | N02200 | Ni 99.2 (2.4066) | | **Pipe & Tube** | ASTM B161, B725/B725M | SB-161, SB-725 | N02200 | Ni 99.2 (2.4066) | | **Forgings** | ASTM B564 | SB-564 | N02200 | - | | **Wire** | ASTM B160 | - | N02200 | - | #### **6. Key Characteristics & Advantages** * **Excellent Corrosion Resistance:** Resists corrosion by dilute sulfuric and hydrochloric acids, caustic alkalis, and various neutral and reducing salts. * **High Thermal & Electrical Conductivity:** Superior to most corrosion-resistant alloys. * **Good Mechanical Properties:** Maintains strength and ductility from cryogenic temperatures up to about 315°C (600°F). * **Low-Temperature Suitability:** Excellent toughness and ductility at cryogenic temperatures. * **Magnetic:** Nickel 200 is magnetically soft (ferromagnetic) at room temperature but becomes non-magnetic (paramagnetic) above its Curie temperature of approximately 360°C (680°F). * **Ease of Fabrication:** Can be readily formed and machined using standard techniques. #### **7. Product Applications** Nickel 200 is used across numerous industries due to its unique combination of properties: * **Chemical Processing:** * Caustic soda (sodium hydroxide) production and handling equipment. * Reaction vessels, evaporators, and heat exchangers for processing halogen acids. * Piping, valves, and pumps for handling corrosive chemicals. * **Food & Pharmaceutical Processing:** * Equipment for fatty acid and soap manufacturing where product purity is critical. * Components that require resistance to corrosion and easy cleaning. * **Aerospace & Defense:** * Critical components in radar and television tubes. * Aerospace structures requiring performance at cryogenic temperatures. * **Electronics & Electrical:** * Electron tube components (anodes, grids, sid rods). * Spark plug electrodes. * Electrical resistance wires. * **Other Applications:** * Water desalination and distillation plants. * Synthetic fiber production. * Marine and architectural applications. --- **Disclaimer:** The information provided herein is for reference purposes only. Material properties can vary based on manufacturing process, heat treatment, and product form. For critical applications, consult the relevant material standards and a qualified materials engineer.

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 1624 gallon liquid totes Special package is available on request.