Alloy 404,Monel 404 Pipe,,E FORU

British Specs:，American Specs:，German Specs:

**Technical Datasheet: Monel® 404 Pipe (UNS N04404)** --- ### **Overview** Monel® 404 Pipe (UNS N04404) is a nickel-copper alloy piping product specifically designed for applications requiring precise thermal expansion control and excellent corrosion resistance. This alloy maintains exceptional performance in electronic, electrical, and specialized industrial applications where dimensional stability and reliable performance in corrosive environments are essential. --- ### **Chemical Composition (Weight %)** | Element | Content (%) | Role | |---------|-------------|------| | Nickel (Ni) | 52.0-57.0 | Base element, provides matrix structure | | Copper (Cu) | Balance (~41-45) | Corrosion resistance, electrical conductivity | | 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 --- ### **Pressure-Temperature Ratings** **Maximum Working Pressure:** - **Room Temperature**: 120 bar (1750 psi) - **150°C (300°F)**: 95 bar (1400 psi) - **300°C (570°F)**: 70 bar (1000 psi) **Temperature Range:** - **Minimum**: -196°C (-320°F) - **Maximum**: 480°C (900°F) continuous service --- ### **Product Applications** **Electronic & Electrical Systems:** - Glass-to-metal seal piping systems - Vacuum system piping - Semiconductor manufacturing gas lines - Electronic cooling systems - Instrumentation piping - Waveguide components **Chemical Processing:** - Chemical transfer lines - Marine and offshore piping systems - Process instrumentation lines - Heat exchanger tubing - Corrosive fluid handling systems **Specialized Applications:** - Cryogenic transfer lines - Aerospace fluid systems - Research laboratory equipment - Medical gas systems - Nuclear instrumentation piping **Industrial Applications:** - Heat treatment furnace piping - Annealing atmosphere lines - Chemical processing equipment - Marine engineering systems - Power generation components --- ### **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:** - Excellent weldability using GTAW (TIG) process - Suitable for GMAW (MIG) welding - Recommended filler metal: Monel 404 or similar - 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 Seamless 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** | N04404 | Unified Numbering System | | **DIN** | 2.4360 | Material Number (similar category) | | **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 corrosion resistance** in various environments 3. **Good electrical conductivity** for electronic systems 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 2940 gallon liquid totes Special package is available on request.