Alloy 404,Monel 404 Fittings,,E FORU

British Specs:，American Specs:，German Specs:

**Technical Datasheet: Monel® 404 Fittings (UNS N04404)** --- ### **Overview** Monel® 404 Fittings (UNS N04404) are precision-engineered components manufactured from nickel-copper alloy, specifically designed for applications requiring controlled thermal expansion characteristics and excellent brazing properties. These fittings maintain reliable performance in electronic, electrical, and specialized industrial systems where dimensional stability and corrosion resistance are 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, 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 **Pressure Rating:** - **Maximum Working Pressure**: 120 bar (1750 psi) at 20°C - **Temperature Range**: -196°C to 480°C (-320°F to 900°F) --- ### **Types of Fittings Available** **Butt-Weld Fittings:** - 45° and 90° elbows - Equal and reducing tees - Concentric and eccentric reducers - Caps and stub ends **Socket-Weld Fittings:** - Socket elbows - Socket tees - Unions and couplings - Plugs and bushings **Threaded Fittings:** - NPT threaded components - BSP threaded options - Adapters and connectors **Special Fittings:** - Glass-to-metal seal fittings - Instrumentation connectors - Vacuum system components - Custom-designed fittings --- ### **Product Applications** **Electronic & Electrical Systems:** - Glass-to-metal seal assemblies - Vacuum system fittings - Semiconductor equipment connectors - Electronic cooling system components - Waveguide connectors - RF component fittings **Industrial Applications:** - Chemical processing piping systems - Marine and offshore applications - Heat exchanger connections - Pump and valve connections - Process instrumentation systems **Specialized Applications:** - Cryogenic system fittings - Aerospace fluid systems - Research equipment connections - Nuclear instrumentation fittings - Telecommunications equipment --- ### **Fabrication Characteristics** **Machining:** - Good machinability rating - Recommended cutting speeds: 25-40 m/min - Use positive rake angles and sharp tools - Suitable for precision machining operations **Welding:** - Excellent weldability using GTAW process - Suitable for GMAW and SMAW processes - Use matching filler metals - Pre-heat generally not required **Quality Control:** - Dimensional verification - Pressure testing certification - Material traceability - Surface finish inspection --- ### **International Standards** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | **ASTM** | B366 | Factory-Made Wrought Nickel Alloy Fittings | | **ASME** | B16.9 | Steel Butt-Welding Fittings | | **ASME** | B16.11 | Socket-Welded and Threaded Fittings | | **ASME** | SB-366 | Code-approved nickel alloy fittings | | **UNS** | N04404 | Unified Numbering System | | **DIN** | 2.4360 | Material Number (similar category) | | **ISO** | 9001 | Quality Management Systems | --- ### **Quality Assurance** - Hydrostatic testing certification - Dimensional verification per ASME B16.9 - Chemical composition certification - Mechanical property testing - Heat treatment certification - Non-destructive testing available - 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. **Reliable performance** in specialized industrial applications 5. **Excellent fabricability** for complex fitting geometries --- **Notes:** - "Monel" is a registered trademark of Special Metals Corporation - All fittings supplied with material certification - Custom designs and special configurations available - 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 2945 gallon liquid totes Special package is available on request.