Alloy 205，Nickel 205 Bar(Round bar, Flat bar)，UNS N02205，EFORU

British Specs:，American Specs:AMS 5555 Wire and Ribbon MIL-N-46025，German Specs:

### **Technical Datasheet: Nickel 205 Bar (Round & Flat) UNS N02205** #### **1. Product Overview** **Nickel 205 Bar** (commercially known as **Alloy 205 Bar**) is a wrought product form supplied as round bars and flat bars, manufactured from commercially pure nickel with controlled magnesium addition. This unique composition provides enhanced oxidation resistance and improved elevated temperature performance compared to standard Nickel 200/201 bars, while maintaining the excellent corrosion resistance and electrical conductivity characteristic of pure nickel. The magnesium content (typically 0.01-0.10%) offers superior protection against high-temperature oxidation, making Nickel 205 Round Bar and Flat Bar particularly suitable for applications requiring long-term stability in oxidizing atmospheres. These product forms are ideal for machining, forging, and fabricating components that demand both corrosion resistance and enhanced high-temperature capability. #### **2. Chemical Composition (% Weight)** | Element | Content (%) | Content (%) (Typical) | | :--- | :--- | :--- | | **Nickel (Ni)** | 99.0 min | ≥ 99.0 | | **Magnesium (Mg)** | **0.01 - 0.10** | **0.03 - 0.06** | | **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) | 69 W/m·K | 478 BTU·in/hr·ft²·°F | | **Electrical Resistivity** | 0.096 µΩ·m | 36.8 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)** **Annealed Condition:** * **Tensile Strength:** 400 - 520 MPa (58 - 75 ksi) * **Yield Strength (0.2% Offset):** 120 - 240 MPa (17 - 35 ksi) * **Elongation (in 2 inches):** 40 - 50% **High-Temperature Performance (at 500°C/932°F):** * **Tensile Strength:** ~ 280 MPa (41 ksi) * **Yield Strength:** ~ 120 MPa (17 ksi) * **Oxidation Resistance:** Superior to Nickel 200/201 #### **5. International Standards for Bar** Nickel 205 Round Bar and Flat Bar conform to the following standards: | Standard Organization | Standard Number | Title / Scope | | :--- | :--- | :--- | | **ASTM International** | **ASTM B160** | Standard Specification for Nickel Rod and Bar | | **ASME** | **SB-160** | Nickel Rod and Bar | | **UNS** | **N02205** | Unified Numbering System | | **Custom Specifications** | **Various** | Manufacturer-specific standards | #### **6. Key Characteristics & Advantages** * **Enhanced Oxidation Resistance:** Magnesium addition provides superior protection against high-temperature oxidation up to 650°C (1200°F) * **Improved High-Temperature Stability:** Better mechanical properties retention at elevated temperatures compared to Nickel 200/201 * **Excellent Machinability:** Good machining characteristics for both round and flat bar forms * **Maintained Electrical Conductivity:** Suitable for electrical and electronic applications requiring bar stock * **Good Fabricability:** Can be readily machined, formed, and welded using standard techniques * **Corrosion Resistance:** Maintains good resistance to caustic environments and reducing atmospheres #### **7. Temperature Capability** * **Maximum Continuous Service:** **650°C (1200°F)** * **Intermittent Service:** Up to 870°C (1600°F) for short durations * **Optimal Performance Range:** 300-600°C (572-1112°F) * **Minimum Service Temperature:** -196°C (-321°F) #### **8. Product Applications** **Round Bar Applications:** * **Electrical Components:** Lead frames, connector pins, and contact supports * **Industrial Shafting:** Furnace component shafts and actuator rods * **Fastener Stock:** High-temperature bolts, studs, and precision pins * **Electrode Manufacturing:** Resistance welding electrodes and tips **Flat Bar Applications:** * **Structural Components:** High-temperature support brackets and frames * **Electrical Contacts:** Bus bars and electrical connection components * **Machined Parts:** Base plates, connectors, and structural elements * **Furnace Components:** Heat treatment rails and support structures **Industry Applications:** * **Electronics Manufacturing:** Semiconductor processing components * **Heat Treatment Industry:** Furnace fixtures and handling components * **Electrical Engineering:** High-temperature electrical contacts and connectors * **Automotive Industry:** Sensor components and high-temperature fittings #### **9. Manufacturing & Processing** * **Machining:** Good machinability with proper tool geometry and cooling * **Heat Treatment:** Solution annealing recommended at 700-900°C (1292-1652°F) * **Welding:** Compatible with GTAW, GMAW, and resistance welding methods * **Surface Finish:** Can be polished, ground, or special finished as required --- **Disclaimer:** The technical information provided is for reference purposes. Actual properties may vary based on manufacturing process, size, and heat treatment. For critical applications, consult the complete material specifications and qualified engineering resources. Performance verification at specific service temperatures is recommended for high-temperature applications.

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 1652 gallon liquid totes Special package is available on request.