Alloy 200，Nickel 200 Bar(Round bar, Flat bar)，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 Bar (Round & Flat) UNS N02200** #### **1. Product Overview** **Nickel 200 Bar** (commercially known as **Alloy 200 Bar** and standardized as **UNS N02200**) is a wrought product form supplied as round bars and flat bars. Fabricated from commercially pure nickel (99.6% minimum), this material is renowned for its exceptional corrosion resistance, high thermal and electrical conductivity, and favorable magnetic properties. Nickel 200 Round Bar and Flat Bar are widely used in machined components, fasteners, and structural parts within aggressive environments. They offer excellent mechanical properties from cryogenic temperatures up to approximately **315°C (600°F)**. The alloy is easily machinable, weldable, and formed, making it a versatile choice for engineering applications. **High-Temperature Advisory:** For sustained service above 315°C (600°F), **Nickel 201 Bar (UNS N02201)** is the recommended grade. Its lower carbon content prevents embrittlement caused by grain-boundary carbide precipitation, which can occur in Nickel 200 at elevated temperatures. #### **2. Chemical Composition (% Weight)** The composition meets the requirements of international bar standards such as ASTM B160. | 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 | | **Curie Temperature** | ~ 360 °C | ~ 680 °F | #### **4. Mechanical Properties (Typical for Bar)** Mechanical properties vary with the form (round or flat), size, and temper condition (hot-finished, cold-drawn, or annealed). **Annealed Condition:** * **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% **Cold-Drawn/Cold-Worked Condition (Higher Strength):** * **Tensile Strength:** 620 - 760 MPa (90 - 110 ksi) * **Yield Strength (0.2% Offset):** 480 - 620 MPa (70 - 90 ksi) * **Elongation:** 15 - 30% #### **5. International Standards for Bar** Nickel 200 Round Bar and Flat Bar are supplied according to the following key international standards: | Product Form | Standard Number | Title / Scope | | :--- | :--- | :--- | | **Round & Bar (General)** | **ASTM B160** | Standard Specification for Nickel Rod and Bar | | **Round & Bar (General)** | **ASME SB-160** | Nickel Rod and Bar (for ASME Boiler and Pressure Vessel Code) | | **Bar (Aerospace)** | **AMS 5556** | Bar, Nickel Alloy, Corrosion and Heat-Resistant | | **Unified Numbering System** | **UNS N02200** | Designation for Wrought Nickel (99.0% min) | | **European Standard** | **EN 10095 / DIN 17740** | Ni 99.2 (Material Number 2.4066) | #### **6. Key Characteristics & Advantages** * **Superior Corrosion Resistance:** Demonstrates excellent resistance to 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. * **Excellent Fabricability:** Nickel 200 bar offers **good machinability** (rated at around 30% relative to free-cutting brass) and can be readily welded using all common techniques like GTAW (TIG) and GMAW (MIG). * **High Conductivity:** Possesses high thermal and electrical conductivity, superior to most corrosion-resistant alloys. * **Magnetic Properties:** Ferromagnetic at room temperature but becomes non-magnetic (paramagnetic) upon heating above its Curie temperature of approximately 360°C (680°F). * **Cryogenic Toughness:** Maintains excellent ductility and impact strength at sub-zero temperatures. #### **7. Product Applications** Nickel 200 Round and Flat Bars are typically machined or fabricated into critical components for severe service environments. **Round Bar Applications:** * **Valve Stems and Shafts:** For pumps and valves in chemical processing. * **Fasteners:** Studs, bolts, and nuts for flanged connections in corrosive service. * **Electrodes:** For electronic components and spark plugs. * **Screw Machine Parts:** Automatically machined into small, complex components. * **Agitator Arms and Mixer Shafts:** In reactors and tanks handling caustics. **Flat Bar Applications:** * **Structural Supports & Brackets:** In chemical tanks and processing units. * **Wear Strips and Guides:** For machinery operating in corrosive atmospheres. * **Fabricated Chassis and Frames:** For specialized electrical and process equipment. * **Bushing and Bearing Stock:** For custom-sized components. **Industries Served:** * Chemical & Petrochemical Processing * Caustic Soda (Sodium Hydroxide) Production * Pharmaceutical and Food Processing * Aerospace and Defense * Marine and Offshore Engineering * Electronics and Telecommunications --- **Disclaimer:** The information provided is typical and for reference purposes. Actual properties may vary based on manufacturing method, size, and heat treatment. For critical applications, consultation of the full material specification and a qualified engineer is essential.

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 1626 gallon liquid totes Special package is available on request.