Alloy 401,Monel 401 Tube,,E FORU

British Specs:，American Specs:，German Specs:

**Technical Datasheet: Monel® 401 Tube (UNS N04401)** --- ### **Overview** Monel® 401 Tube (UNS N04401) is a nickel-copper alloy tubing product specifically engineered for applications requiring precise thermal expansion control and excellent electrical conductivity. This alloy is particularly valuable in electronic, electrical, and specialized industrial applications where dimensional stability and reliable performance under varying thermal conditions are critical. --- ### **Chemical Composition (Weight %)** | Element | Content (%) | Role | |---------|-------------|------| | Nickel (Ni) | 40.0-45.0 | Base element, provides matrix structure | | Copper (Cu) | Balance (~52-57) | Electrical conductivity, corrosion resistance | | Iron (Fe) | 1.0-2.0 | Strength enhancement | | Manganese (Mn) | 1.5-2.5 | Deoxidizer, improves hot workability | | Silicon (Si) | 0.1-0.5 | Deoxidizer | | Carbon (C) | 0.1-0.25 | Strength enhancement | | Sulfur (S) | ≤0.015 | Controlled impurity | | Magnesium (Mg) | 0.05-0.20 | Desulfurization, grain refinement | --- ### **Physical Properties** | Property | Value | |----------|-------| | Density | 8.83 g/cm³ (0.319 lb/in³) | | Melting Range | 1300-1350°C (2370-2460°F) | | Thermal Conductivity | 25.2 W/m·K (at 20°C) | | Coefficient of Thermal Expansion | 14.5 μm/m·°C (20-100°C) | | Specific Heat Capacity | 440 J/kg·K | | Electrical Resistivity | 0.49 μΩ·m | | Modulus of Elasticity | 179 GPa (26 × 10⁶ psi) | | Magnetic Permeability | <1.005 (slightly magnetic when cold worked) | --- ### **Mechanical Properties** **Annealed Condition:** - **Tensile Strength**: 480-550 MPa (70-80 ksi) - **Yield Strength (0.2% Offset)**: 170-240 MPa (25-35 ksi) - **Elongation**: 35-45% - **Hardness**: HRB 65-75 **Cold Worked Condition:** - **Tensile Strength**: 620-690 MPa (90-100 ksi) - **Yield Strength**: 480-550 MPa (70-80 ksi) - **Elongation**: 15-25% - **Hardness**: HRB 85-95 --- ### **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** **Electrical & Electronic Applications:** - Lead frame components - Vacuum tube parts - Semiconductor manufacturing equipment - Electronic cooling systems - Connector components - Resistance welding electrodes **Industrial Applications:** - Heat exchanger tubing - Instrumentation tubing - Chemical processing equipment - Marine and offshore systems - Hydraulic and pneumatic systems **Specialized Applications:** - Glass-to-metal seal systems - Thermocouple protection tubes - Cryogenic transfer lines - Aerospace components - Research laboratory equipment - Nuclear instrumentation --- ### **Fabrication Characteristics** **Welding:** - Excellent weldability using GTAW (TIG) process - Suitable for GMAW (MIG) welding - Recommended filler metal: Monel 60 or equivalent - 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** | N04401 | Unified Numbering System | | **DIN** | 2.4360 | Material Number 2.4360 | | **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 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 2928 gallon liquid totes Special package is available on request.