Alloy 404,Monel 404 Tube,,E FORU

British Specs:，American Specs:，German Specs:

**Technical Datasheet: Monel® 404 Tube (UNS N04404)** --- ### **Overview** Monel® 404 Tube (UNS N04404) is a nickel-copper alloy tubing product specifically engineered for applications requiring precise thermal expansion control and excellent electrical conductivity. This alloy is particularly designed for electronic and electrical applications where reliable performance in glass-to-metal sealing and specialized industrial environments is essential. --- ### **Chemical Composition (Weight %)** | Element | Content (%) | Role | |---------|-------------|------| | Nickel (Ni) | 52.0-57.0 | Base element, provides matrix structure | | Copper (Cu) | Balance (~41-45) | Electrical conductivity, corrosion resistance | | Iron (Fe) | ≤0.50 | Controlled residual element | | 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% - **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 --- ### **Tube Specifications** **Available Sizes:** - **Outside Diameter**: 3 mm to 100 mm (0.125" to 4") - **Wall Thickness**: 0.5 mm to 6.0 mm (0.020" to 0.250") - **Lengths**: Standard and custom lengths available **Manufacturing Methods:** - **Seamless**: Cold drawn, pilgered - **Welded**: GTAW welded, cold worked - **Surface Finish**: Annealed and pickled, bright annealed **Tolerance Standards:** - Dimensional tolerances per ASTM B725 - Wall thickness tolerance: ±10% - Ovality: Within standard dimensional tolerances --- ### **Product Applications** **Electronic & Electrical Systems:** - Glass-to-metal seal assemblies - Vacuum tube components - Semiconductor manufacturing equipment - Electronic cooling systems - Waveguide components - RF connector parts **Industrial Applications:** - Heat exchanger tubing - Instrumentation tubing - Chemical processing equipment - Marine and offshore systems - Cryogenic transfer lines **Specialized Applications:** - Aerospace components - Medical device tubing - Research laboratory equipment - Nuclear instrumentation - Telecommunications equipment --- ### **Fabrication Characteristics** **Welding:** - Excellent weldability using GTAW process - Suitable for GMAW and laser welding - Use matching filler materials - Pre-heat generally not required - Post-weld heat treatment optional **Forming and Bending:** - Good cold and hot forming characteristics - Minimum bend radius: 2× tube diameter - Hot working temperature: 850-1150°C (1560-2100°F) - Suitable for bending, flaring, and flanging operations **Machining:** - Good machinability rating - Recommended cutting speeds: 20-35 m/min - Use positive rake angles and sharp tools - Suitable for precision machining operations --- ### **International Standards** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | **ASTM** | B165 | Standard Specification for Nickel-Copper Alloy Seamless Pipe and Tube | | **ASTM** | B725 | Standard Specification for Welded Nickel and Nickel-Alloy Tube | | **ASME** | SB-165 | Code-approved seamless tube specification | | **ASME** | SB-725 | Code-approved welded tube specification | | **UNS** | N04404 | Unified Numbering System | | **DIN** | 2.4360 | Material Number (similar category) | | **ISO** | 6207 | Nickel alloy tubes for general purposes | --- ### **Quality Assurance** - Hydrostatic testing per ASTM standards - Eddy current or ultrasonic examination - Dimensional verification - Chemical analysis certification - Mechanical property testing - Heat treatment certification - Surface quality inspection - EN 10204 3.1/3.2 certification available --- ### **Key Advantages** 1. **Controlled thermal expansion** for precision glass-sealing applications 2. **Excellent electrical conductivity** for electronic systems 3. **Good corrosion resistance** in various environments 4. **Superior fabricability** for complex tubular components 5. **Reliable performance** in specialized industrial applications --- **Notes:** - "Monel" is a registered trademark of Special Metals Corporation - Store tubes 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 2941 gallon liquid totes Special package is available on request.