Alloy 404,Monel 404 Bar(Round bar, Flat bar),,E FORU

British Specs:，American Specs:，German Specs:

**Technical Datasheet: Monel® 404 Bar (Round Bar & Flat Bar) UNS N04404** --- ### **Overview** Monel® 404 Bar (UNS N04404) is a nickel-copper alloy available in both round bar and flat bar forms, specifically engineered for electronic and electrical applications requiring precise thermal expansion control and excellent brazing characteristics. This alloy is particularly valued for glass-to-metal sealing applications and electronic components where dimensional stability is critical. --- ### **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 thermal 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% - **Reduction of Area**: 45-55% - **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 matching various glass types - Excellent for glass-to-metal sealing applications - Stable thermal performance across operating ranges - Good thermal conductivity **Electrical Properties:** - High electrical conductivity - Low contact resistance - Suitable for precision electronic applications --- ### **Product Applications** **Round Bar Applications:** - Glass-to-metal seal terminals and pins - Electronic connector components - Lead frame manufacturing - Semiconductor equipment shafts - Vacuum tube components - Precision instrument shafts **Flat Bar Applications:** - Electronic component bases and mounts - Bus bar components - Support brackets for electrical equipment - Heat sink bases - Machinery structural components - Chemical processing equipment parts **Industry-Specific Applications:** - **Electronics**: Semiconductor manufacturing components, connector systems - **Telecommunications**: Waveguide components, RF equipment parts - **Aerospace**: Electronic housing components, instrumentation parts - **Medical**: Device components, instrument bases - **Industrial**: Chemical processing equipment, marine components --- ### **Fabrication Characteristics** **Machining:** - Excellent machinability rating - Recommended cutting speeds: 25-40 m/min (80-130 SFM) - Use positive rake angles and sharp tools - Suitable for automatic screw machine operations - Good surface finish achievable **Welding:** - Good weldability using GTAW process - Suitable for GMAW and resistance welding - Use matching filler materials - Pre-heat generally not required **Forming and Hot Working:** - Good cold and hot working characteristics - Hot working temperature: 850-1150°C (1560-2100°F) - Cold working requires intermediate annealing - Suitable for bending and forming operations --- ### **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 for pressure applications | | **SAE** | AMS 4674 | Nickel Alloy 404 Bar and Rod | | **UNS** | N04404 | Unified Numbering System | | **DIN** | 2.4360 | Material Number (similar category) | | **ISO** | 9724 | Nickel alloy bars for general purposes | --- ### **Available Specifications** **Round Bar:** - Diameters: 3 mm to 200 mm (0.125" to 8") - Lengths: 3-6 meters (10-20 feet) standard - Surface: Centerless ground, turned, or hot finished **Flat Bar:** - Thickness: 3 mm to 100 mm (0.125" to 4") - Width: 10 mm to 300 mm (0.375" to 12") - Lengths: Standard and custom lengths available - Edges: Square, rounded, or beveled --- ### **Quality Assurance** - Complete material traceability - Chemical composition certification - Mechanical property testing - Dimensional verification - Surface quality inspection - Heat treatment certification - EN 10204 3.1/3.2 certification available --- ### **Key Advantages** 1. **Precision thermal expansion control** for glass sealing applications 2. **Excellent electrical conductivity** for electronic components 3. **Good corrosion resistance** in various environments 4. **Superior machinability** for complex component manufacturing 5. **Reliable performance** in specialized industrial applications --- **Notes:** - "Monel" is a registered trademark of Special Metals Corporation - Store bars in clean, dry conditions to prevent surface contamination - Special handling recommended for electronic grade material - Consult technical experts for specific application requirements *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 2939 gallon liquid totes Special package is available on request.