Alloy 200，Nickel 200 Pipe，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 Pipe (UNS N02200)** #### **1. Product Overview** **Nickel 200 Pipe** (also known as **Alloy 200 Pipe**) is a wrought product form manufactured from commercially pure nickel (99.6% minimum). This pipe is engineered for exceptional performance in transporting aggressive chemicals, gases, and process streams where corrosion resistance, product purity, and high thermal conductivity are critical. Nickel 200 Pipe exhibits outstanding resistance to reducing environments, caustic alkalis, and neutral salts. It maintains excellent mechanical properties from cryogenic temperatures up to approximately **315°C (600°F)**. Its high ductility and good weldability make it suitable for complex piping systems. **High-Temperature Advisory:** For continuous service above 315°C (600°F), **Nickel 201 Pipe (UNS N02201)** is the strongly recommended grade. Its low carbon content prevents the embrittlement that can occur in Nickel 200 due to grain-boundary carbide precipitation at elevated temperatures. #### **2. Chemical Composition (% Weight)** The composition conforms to standard specifications for pipe and tube products such as ASTM B161. | Element | Content (%) (ASTM B161) | 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 | | **Curie Temperature** | ~ 360 °C | ~ 680 °F | #### **4. Mechanical Properties (Typical for Annealed Pipe)** | Property | Metric Unit | Imperial Unit | | :--- | :--- | :--- | | **Tensile Strength** | 460 - 620 MPa | 67 - 90 ksi | | **Yield Strength (0.2% Offset)** | 150 - 310 MPa | 22 - 45 ksi | | **Elongation (in 2 inches / 50mm)** | 40 - 50% | 40 - 50% | #### **5. International Standards for Pipe** Nickel 200 Pipe is manufactured to several key international standards that define dimensions, tolerances, and testing requirements. | Standard Organization | Standard Number | Title / Scope | | :--- | :--- | :--- | | **ASTM International** | **ASTM B161** | Standard Specification for Nickel Seamless Pipe and Tube | | **ASTM International** | **ASTM B729/B729M** | Standard Specification for Seamless UNS N02200 & N02201 Pipe for Corrosive Service | | **ASME** | **SB-161** | Nickel Seamless Pipe and Tube (for BPVC) | | **ASME** | **SB-729** | Seamless UNS N02200 & N02201 Pipe (for BPVC) | | **ASME (Dimensional)** | **ASME B36.19M** | Stainless Steel and Nickel/Nickel Alloy Pipe (Sizes) | | **UNS** | **N02200** | Unified Numbering System | | **EN (Europe)** | **EN 10305-4 / DIN 17750** | Ni 99.2 (Material Number 2.4066) | #### **6. Key Characteristics & Advantages** * **Superior Corrosion Resistance:** Excellent resistance to a wide range of corrosive media, including caustic alkalis (e.g., sodium hydroxide), dilute hydrochloric and sulfuric acids, and various neutral and reducing salt solutions. Highly resistant to chloride-induced stress corrosion cracking. * **High Thermal Conductivity:** Offers efficient heat transfer, making it suitable for heat exchanger and condenser applications. * **Excellent Fabricability:** Nickel 200 Pipe can be easily bent, formed, and flared. It is readily weldable using all common techniques, especially Gas Tungsten Arc Welding (GTAW/TIG), with matching Nickel 200 filler metal (ERNi-1). * **Low Gas Permeability:** Particularly to hydrogen and other gases, which is critical for high-purity systems and aerospace applications. * **Cryogenic Toughness:** Maintains excellent ductility and impact strength at sub-zero temperatures, making it suitable for liquefied gas services. #### **7. Product Applications** Nickel 200 Pipe is specified for critical fluid transport in highly corrosive environments across multiple industries. * **Chemical & Petrochemical Processing:** * Transfer lines for caustic soda (sodium hydroxide) and other strong alkalis. * Piping for halogen acid (HCl, HF) handling systems. * Reactor effluent coolers and process piping in reducing environments. * **Food & Pharmaceutical Processing:** * Process lines for fatty acid hardening and soap manufacture. * Piping systems where product purity and cleanability are paramount. * **Aerospace & Defense:** * Hydraulic and pneumatic lines in critical systems. * Fuel and instrument lines requiring high reliability. * **Alkaline Service:** * Evaporator and concentrator tubes in caustic solution production. * Piping in mercaptan and amine processing units. * **Other Industrial Applications:** * Heat exchanger and condenser tubes. * Piping for synthetic fiber production. * Components in marine and offshore applications. --- **Disclaimer:** The information provided herein is for reference purposes. Material properties can vary based on manufacturing process, size, and heat treatment. For all critical applications, especially those involving pressure, always consult the complete material standard, applicable design codes (e.g., ASME BPVC), 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 1627 gallon liquid totes Special package is available on request.