Alloy 205，Nickel 205 Wire，UNS N02205，EFORU

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

### **Alloy 205 / Nickel 205 Wire (UNS N02205) - Product Introduction** **Overview** Alloy 205, commonly known as Nickel 205, is a commercially pure wrought nickel (99.0% minimum) known for its excellent combination of high electrical and thermal conductivity, good mechanical properties, and outstanding resistance to corrosion in various environments. It is one of the most widely used nickel alloys for electronic and electrical applications due to its reliable performance and ease of fabrication. The UNS (Unified Numbering System) designation for this alloy is **N02205**. It is often supplied in the form of wire, rod, and strip, making it ideal for components requiring precise dimensions and consistent material properties. --- ### **Chemical Composition** The chemical composition of Nickel 205 is carefully controlled to maximize its electrical and corrosion-resistant properties. A typical composition is as follows: | Element | Content (%) (Approximate) | | :--- | :--- | | **Nickel (Ni)** | 99.0 (Minimum) | | **Manganese (Mn)** | 0.01 - 0.50 | | **Copper (Cu)** | 0.05 - 0.25 | | **Iron (Fe)** | 0.10 - 0.30 | | **Carbon (C)** | 0.05 - 0.15 | | **Silicon (Si)** | ≤ 0.10 | | **Magnesium (Mg)** | 0.01 - 0.10 | | **Sulfur (S)** | ≤ 0.005 | **Key Point:** The addition of a small, controlled amount of Magnesium (Mg) provides improved resistance to oxidation and scaling at high temperatures and enhances the material's workability. --- ### **Physical Properties** Nickel 205 exhibits a set of physical properties that make it highly suitable for technical applications. | Property | Value / Condition | | :--- | :--- | | **Density** | 8.89 g/cm³ (0.321 lb/in³) | | **Melting Point** | 1435-1445 °C (2615-2633 °F) | | **Electrical Resistivity** | ~9.5 μΩ·cm at 20°C | | **Thermal Conductivity** | ~70 W/m·K at 20°C | | **Thermal Expansion Coefficient** | 13.3 μm/m·°C (20-100°C) | | **Magnetic Permeability** | Typically < 1.1 (Essentially non-magnetic) | --- ### **Mechanical Properties (Typical for Wire)** Mechanical properties can vary based on the temper (annealed, hard-drawn, etc.). The following are typical ranges for Nickel 205 wire. | Temper | Tensile Strength | Yield Strength (0.2% Offset) | Elongation (in 2 inches) | | :--- | :--- | :--- | :--- | | **Annealed (Soft)** | 380 - 550 MPa (55 - 80 ksi) | 110 - 240 MPa (16 - 35 ksi) | 35 - 50% | | **Hard Drawn** | 620 - 860 MPa (90 - 125 ksi) | 550 - 830 MPa (80 - 120 ksi) | 2 - 15% | --- ### **International Standards** Nickel 205 is recognized and specified by several major international standards organizations. The wire form is commonly covered under rod and wire specifications. | Standard Organization | Standard Number & Title | Product Form | | :--- | :--- | :--- | | **ASTM International** | **ASTM F239** - Standard Specification for Wrought Nickel 200 and Nickel 201 Plate, Sheet, and Strip | Plate, Sheet, Strip | | | **ASTM B160** - Standard Specification for Nickel Rod and Bar | Rod, Bar | | | **ASTM B162** - Standard Specification for Nickel Plate, Sheet, and Strip | Plate, Sheet, Strip | | **SAE (AMS)** | **AMS 5553** / **AMS 7232** (Wire) | Wire | | **UNS** | **N02205** | All Forms | | **DIN** | **DIN 17740** / **Ni 99.2** (Material No. 2.4060) | All Forms | *Note: While "Nickel 200" (UNS N02200) is more common in many standards, Nickel 205 (N02205) is the preferred grade for electronic applications due to its controlled magnesium content. It is often supplied to the mechanical and physical property requirements of these standards.* --- ### **Product Applications** Nickel 205 wire is primarily selected for its excellent electrical properties and corrosion resistance. Its key applications include: * **Lead Wires:** For electron tubes, vacuum tubes, and glass-to-metal seals. Its thermal expansion characteristics are well-suited for sealing with certain glasses. * **Resistance Wires:** Used in precision resistors and heating elements for low-temperature applications. * **Electronic Components:** Anode and cathode supports, connectors, springs, and pins in various electronic devices. * **Spark Plug Electrodes:** Its corrosion resistance and conductivity are beneficial in automotive and aerospace spark plugs. * **Chemical Processing:** Wire mesh, baskets, and components for handling caustic alkalis and other corrosive chemicals where iron contamination must be avoided. * **Fasteners and Screws:** For use in corrosive environments. --- ### **Key Advantages and Characteristics** * **High Purity:** Excellent corrosion resistance, particularly to caustic alkalis. * **Superior Conductivity:** Offers a great balance of electrical and thermal conductivity. * **Good Fabricability:** Can be easily drawn, formed, welded, and machined. * **High-Temperature Stability:** Maintains strength and oxidation resistance at elevated temperatures. * **Low Magnetic Permeability:** Ideal for applications where magnetic materials are undesirable. * **Reliable Sealing:** Its controlled thermal expansion makes it a prime choice for glass-to-metal seals in the electronics industry. In summary, **Alloy 205 (UNS N02205) wire** is a versatile, high-performance nickel alloy that is indispensable in the electrical, electronic, and chemical industries where reliability, conductivity, and corrosion resistance are paramount.

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 1662 gallon liquid totes Special package is available on request.