Alloy 404,Monel 404 ,,E FORU

British Specs:，American Specs:，German Specs:

**Technical Datasheet: Monel® 404 / Alloy 404 (UNS N04404)** --- ### **Overview** Monel® 404 (UNS N04404) is a nickel-copper alloy specifically designed for specialized electronic and electrical applications. This alloy features carefully controlled composition to provide specific thermal expansion characteristics and excellent brazing properties, making it particularly suitable for glass-to-metal seals and electronic components. --- ### **Chemical Composition (Weight %)** | Element | Content (%) | Role | |---------|-------------|------| | Nickel (Ni) | 52.0-57.0 | Base element, provides matrix structure | | Copper (Cu) | Balance (~41-45) | Electrical conductivity, strength | | Iron (Fe) | ≤0.50 | Controlled residual | | Manganese (Mn) | ≤0.10 | Minimized for specific properties | | Silicon (Si) | ≤0.10 | Controlled residual | | Carbon (C) | ≤0.15 | Strength enhancement | | Sulfur (S) | ≤0.015 | Controlled impurity | | Magnesium (Mg) | ≤0.05 | Grain refinement | --- ### **Physical Properties** | Property | Value | |----------|-------| | Density | 8.91 g/cm³ (0.322 lb/in³) | | Melting Range | 1300-1350°C (2370-2460°F) | | Thermal Conductivity | 26.5 W/m·K (at 20°C) | | Coefficient of Thermal Expansion | 13.9 μm/m·°C (20-300°C) | | Specific Heat Capacity | 435 J/kg·K | | Electrical Resistivity | 0.45 μΩ·m | | Modulus of Elasticity | 175 GPa (25.4 × 10⁶ psi) | | Magnetic Permeability | <1.005 (essentially non-magnetic) | --- ### **Mechanical Properties** **Annealed Condition:** - **Tensile Strength**: 450-520 MPa (65-75 ksi) - **Yield Strength (0.2% Offset)**: 180-250 MPa (26-36 ksi) - **Elongation**: 35-45% - **Hardness**: HRB 60-75 **Cold Worked Condition:** - **Tensile Strength**: 600-690 MPa (87-100 ksi) - **Yield Strength**: 480-550 MPa (70-80 ksi) - **Elongation**: 15-25% - **Hardness**: HRB 80-95 --- ### **Special Characteristics** **Thermal Properties:** - Controlled thermal expansion coefficient - Compatible with various glass types - Excellent for matched glass-to-metal seals - Stable thermal performance **Electrical Properties:** - High electrical conductivity - Low contact resistance - Suitable for electronic applications **Fabrication Properties:** - Excellent brazing characteristics - Good weldability - Suitable for precision stamping --- ### **Product Applications** **Electronic & Electrical Components:** - Glass-to-metal seals - Lead frames - Electronic connectors - Semiconductor components - Vacuum tube parts - Relay components **Telecommunications:** - Waveguide components - RF connectors - Microwave components - Communication equipment parts **Specialized Applications:** - Cryogenic equipment - Aerospace components - Medical devices - Instrumentation parts - Precision springs **Industrial Applications:** - Chemical processing equipment - Marine components - Heat exchangers - Bellows and diaphragms --- ### **Corrosion Resistance** - Good resistance to seawater and marine atmospheres - Excellent performance in fresh water - Resistant to alkaline solutions - Good corrosion fatigue properties - Suitable for mild chemical environments --- ### **Fabrication Characteristics** **Machining:** - Good machinability - Use sharp tools with positive rake angles - Recommended speeds: 25-40 m/min - Suitable for automatic screw machines **Welding:** - Good weldability using GTAW process - Resistance welding suitable - Use matching filler materials - Post-weld heat treatment generally not required **Forming:** - Excellent cold working properties - Good ductility and formability - Suitable for deep drawing - Intermediate annealing may be required for severe deformation **Heat Treatment:** - Annealing temperature: 870-980°C (1600-1800°F) - Rapid cooling recommended - Stress relieving: 425-540°C (800-1000°F) --- ### **International Standards** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | **ASTM** | B164 | Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire | | **ASME** | SB-164 | Code-approved version | | **SAE** | AMS 4674 | Nickel Alloy 404 Wire | | **UNS** | N04404 | Unified Numbering System | | **DIN** | 2.4360 | Material Number (similar category) | | **ISO** | 6208 | Nickel alloy sheet, plate and strip | --- ### **Available Product Forms** - Rod and Bar - Wire and Strip - Sheet and Plate - Tubing - Custom shapes and components --- ### **Quality Assurance** - Chemical composition certification - Mechanical property testing - Dimensional inspection - Surface quality verification - Special testing for electronic applications - EN 10204 3.1/3.2 certification available --- ### **Key Advantages** 1. **Controlled thermal expansion** for glass sealing applications 2. **Excellent electrical conductivity** 3. **Good corrosion resistance** 4. **Superior brazing characteristics** 5. **Good fabricability** for precision components --- **Notes:** - "Monel" is a registered trademark of Special Metals Corporation - Special handling recommended for electronic grade material - Consult technical experts for specific application requirements - Properties may vary with processing and heat treatment *For detailed technical assistance and application engineering support, contact materials engineering specialists.*

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 2937 gallon liquid totes Special package is available on request.