MONEL 404 Copper-Nickel Alloy，1

### **Product Introduction: MONEL® 404 Copper-Nickel Alloy** **MONEL® 404** is a specialized copper-nickel alloy specifically designed for applications requiring controlled thermal expansion characteristics and excellent electrical properties. This alloy features a carefully balanced composition that provides unique physical properties, making it particularly suitable for electronic and electrical applications where precise performance characteristics are essential. The alloy demonstrates good ductility and can be readily fabricated using conventional methods. Its specialized composition makes it particularly valuable for applications requiring specific thermal expansion behavior and reliable electrical performance. --- ### **Chemical Composition** | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | 52.0 - 57.0 | | **Copper (Cu)** | Balance | | **Iron (Fe)** | 0.50 max | | **Manganese (Mn)** | 0.10 max | | **Carbon (C)** | 0.15 max | | **Silicon (Si)** | 0.10 max | | **Sulfur (S)** | 0.015 max | | **Magnesium (Mg)** | 0.10 - 0.50 | --- ### **Physical Properties** | Property | Value | |----------|-------| | **Density** | 8.91 g/cm³ | | **Melting Point** | 1430 - 1480 °C | | **Thermal Conductivity** | 25.0 W/m·K (at 20°C) | | **Electrical Resistivity** | 0.49 μΩ·m | | **Modulus of Elasticity** | 158 GPa | | **Coefficient of Thermal Expansion** | 12.8 μm/m·°C (20-300°C) | | **Specific Heat Capacity** | 440 J/kg·K | | **Magnetic Permeability** | <1.001 (Essentially non-magnetic) | --- ### **Mechanical Properties** **Annealed Condition:** - **Tensile Strength:** 380 - 480 MPa - **Yield Strength (0.2% Offset):** 120 - 220 MPa - **Elongation:** 35 - 45% - **Hardness:** 65 - 75 HRB **Cold Worked Condition:** - **Tensile Strength:** 550 - 650 MPa - **Yield Strength (0.2% Offset):** 450 - 550 MPa - **Elongation:** 15 - 25% - **Hardness:** 85 - 95 HRB --- ### **Key Characteristics & Advantages** 1. **Controlled Thermal Expansion** - Predictable and consistent thermal expansion behavior - Suitable for applications requiring dimensional stability - Good thermal fatigue resistance 2. **Excellent Electrical Properties** - Good electrical conductivity - Consistent performance across temperature ranges - Reliable electrical characteristics 3. **Good Fabricability** - Can be readily cold worked and formed - Suitable for stamping and deep drawing operations - Good weldability using appropriate techniques 4. **Specialized Applications** - Designed for specific electronic applications - Consistent performance characteristics - Reliable long-term service --- ### **Product Applications** **Electronics Industry:** - Transistor components - Electronic lead frames - Electrical connectors - Semiconductor packaging **Electrical Applications:** - Lead wires and connectors - Electrical contacts - Resistance welding components - Specialized electrical assemblies **Industrial Applications:** - Temperature-sensitive components - Controlled expansion assemblies - Precision instruments - Specialized fasteners --- ### **International Standards** | Standard Type | Standard Number | Description | |---------------|-----------------|-------------| | **ASTM** | F96 | Electronic Grade Alloys | | **AMS** | 4520 | Wire and Strip | | **UNS** | N04404 | Unified Numbering System | | **ASME** | - | Code-approved applications | | **Customer Specifications** | Various | Application-specific requirements | --- ### **Summary** **MONEL® 404** is a specialized copper-nickel alloy engineered for applications requiring specific thermal and electrical properties. Its carefully controlled composition provides predictable thermal expansion behavior and reliable electrical performance, making it particularly valuable for electronic components, electrical connectors, and precision instruments. The alloy's good fabricability and consistent properties ensure reliable performance in demanding applications where precise material characteristics are essential. While less common than other MONEL alloys, its specialized properties make it indispensable for specific electronic and electrical applications where conventional materials may not provide the required performance characteristics.

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 3338 gallon liquid totes Special package is available on request.