Alloy 401,Monel 401 Pipe,,E FORU

British Specs:，American Specs:，German Specs:

**Technical Datasheet: Monel® 401 Pipe (UNS N04401)** --- ### **Overview** Monel® 401 Pipe (UNS N04401) is a nickel-copper alloy piping product specifically designed for applications requiring controlled thermal expansion characteristics and excellent electrical conductivity. This alloy maintains exceptional performance in specialized electrical, electronic, and industrial applications where precise thermal properties and reliable corrosion resistance are essential. --- ### **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 --- ### **Pressure-Temperature Ratings** **Maximum Working Pressure:** - **Room Temperature**: 140 bar (2000 psi) - **150°C (300°F)**: 110 bar (1600 psi) - **300°C (570°F)**: 85 bar (1200 psi) **Temperature Range:** - **Minimum**: -196°C (-320°F) - **Maximum**: 480°C (900°F) continuous service --- ### **Product Applications** **Electrical & Electronic Systems:** - Conduit for sensitive electrical wiring - Vacuum system piping - Semiconductor manufacturing equipment - Electronic cooling systems - Instrumentation piping **Industrial Applications:** - Chemical processing pipelines - Marine and offshore piping systems - Heat exchanger tubing - Process instrumentation lines - Hydraulic system components **Specialized Applications:** - Glass-to-metal seal systems - Cryogenic transfer lines - Research laboratory equipment - Aerospace fluid systems - Nuclear instrumentation --- ### **Corrosion Resistance** - Excellent resistance to seawater and salt solutions - Good performance in alkaline environments - Moderate resistance to acidic conditions - Superior to steel in most corrosive environments - Good stress corrosion cracking resistance --- ### **Fabrication Characteristics** **Welding:** - Good weldability using GTAW (TIG) process - Suitable for GMAW (MIG) welding - Use matching filler metals - Pre-heat generally not required - Post-weld heat treatment optional **Pipe Bending:** - Good cold and hot bending characteristics - Minimum bend radius: 3× pipe diameter - Hot bending temperature: 600-800°C (1110-1470°F) - Suitable for various bending methods **Machining:** - Good machinability rating - Recommended cutting speeds: 20-35 m/min - Use positive rake angles and sharp tools - Suitable for threading and grooving operations --- ### **International Standards** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | **ASTM** | B165 | Standard Specification for Nickel-Copper Alloy Pipe and Tube | | **ASME** | SB-165 | Code-approved version for pressure applications | | **ASTM** | B725 | Welded Nickel and Nickel-Alloy Pipe | | **ASME** | SB-725 | Code-approved welded pipe specification | | **UNS** | N04401 | Unified Numbering System | | **DIN** | 2.4360 | Material Number 2.4360 | | **ISO** | 6207 | Nickel alloy pipes for general purposes | --- ### **Available Specifications** **Pipe Sizes:** - **NPS Range**: 1/8" to 24" - **Schedule**: SCH 5S to SCH 80 - **Wall Thickness**: Standard and custom - **Lengths**: Random (6-7 meters) or cut-to-length **Manufacturing Methods:** - **Seamless**: Hot finished, cold drawn - **Welded**: GTAW welded, cold worked - **Surface Finish**: Annealed and pickled, bright annealed **End Preparations:** - Plain ends - Beveled ends for welding - Threaded ends (NPT, BSP) - Special end finishes available --- ### **Quality Assurance** - Hydrostatic testing per ASTM standards - Eddy current or ultrasonic examination - Dimensional verification - Chemical analysis certification - Mechanical property testing - Heat treatment certification - 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. **Reliable performance** in specialized industrial applications 5. **Excellent fabricability** for complex piping systems --- **Notes:** - "Monel" is a registered trademark of Special Metals Corporation - Proper supports required considering thermal expansion characteristics - Consult technical experts for specific application requirements - Properties may vary with manufacturing process 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 2927 gallon liquid totes Special package is available on request.