Alloy 42,Nilo 42 Fittings,UNS K94100,E FORU

British Specs:，American Specs: ASTM F30 ASTM B 753 AMS 5683 Welding Wire，German Specs: WS 1.3917,DIN 17745 AFNOR NF A54-301

**PRODUCT DATASHEET: ALLOY 42 / NILO 42 FITTINGS** **UNS K94100 - Precision Fittings & Components** --- ### **1. OVERVIEW** Alloy 42 (commercially known as **Nilo 42**) is a **nickel-iron alloy** with precisely controlled **42% nickel content**, specifically engineered to provide a **thermal expansion coefficient** that closely matches **borosilicate glass, alumina ceramics, and semiconductor materials**. Manufactured as **precision fittings**, these components ensure reliable thermal compatibility and dimensional stability in critical piping and assembly applications. The alloy is registered under the Unified Numbering System as **UNS K94100**. --- ### **2. CHEMICAL COMPOSITION (Weight %)** | Element | Alloy 42 / Nilo 42 Fittings | UNS K94100 Requirements | |------------------|-----------------------------|-------------------------| | **Nickel (Ni)** | 41.0 – 42.5% | 41.0 – 42.5% | | **Iron (Fe)** | Balance | Balance | | **Manganese (Mn)**| 0.50 – 0.80% | ≤ 0.80% | | **Silicon (Si)** | 0.15 – 0.30% | ≤ 0.30% | | **Carbon (C)** | ≤ 0.05% | ≤ 0.05% | | **Chromium (Cr)**| ≤ 0.15% | ≤ 0.15% | | **Copper (Cu)** | ≤ 0.05% | ≤ 0.05% | | **Aluminum (Al)**| ≤ 0.05% | ≤ 0.05% | | **Sulfur (S)** | ≤ 0.015% | ≤ 0.015% | | **Phosphorus (P)**| ≤ 0.015% | ≤ 0.015% | --- ### **3. PHYSICAL & MECHANICAL PROPERTIES** | Property | Typical Value (Annealed) | |---------------------------------|--------------------------| | **CTE (20–300°C)** | 4.5 – 5.5 × 10⁻⁶/°C | | **Density** | 8.11 g/cm³ | | **Melting Point** | 1420 – 1450°C | | **Tensile Strength** | 520 – 620 MPa | | **Yield Strength (0.2% Offset)**| 280 – 380 MPa | | **Elongation (in 2")** | 30 – 40% | | **Modulus of Elasticity** | 145 GPa | | **Hardness (Rockwell B)** | 70 – 85 HRB | | **Electrical Resistivity** | 0.75 μΩ·m | | **Thermal Conductivity** | 14.5 W/m·K | | **Pressure Rating** | Schedule 40/80 compatible | --- ### **4. INTERNATIONAL STANDARDS & EQUIVALENTS** | Standard Type | Designation | |-------------------------|----------------------| | **UNS** | K94100 | | **ASTM** | F30 (Alloy 42) | | **EN (European)** | Ni42Fe (1.3917) | | **ISO** | NiFe42 | | **JIS** | C42N | | **GB (China)** | 4J42 | | **Fitting Standards** | ASTM B366, ASME B16.9 | --- ### **5. AVAILABLE FITTING TYPES** #### **5.1 Butt-Weld Fittings** - **Elbows**: 45°, 90°, 180° angles - **Tees**: Equal and reducing tees - **Reducers**: Concentric and eccentric - **Caps**: End caps and closures - **Stub Ends**: Lap joint stub ends #### **5.2 Socket-Weld Fittings** - **Couplings**: Socket weld couplings - **Unions**: Socket weld unions - **Elbows**: 45° and 90° socket weld - **Tees**: Socket weld tees #### **5.3 Flanged Components** - **Flanges**: Slip-on, weld neck, blind flanges - **Adapter Rings**: Transition flanges - **Special Shapes**: Custom flange configurations #### **5.4 Special Fittings** - **Instrumentation Fittings**: Metric and imperial sizes - **Vacuum Fittings**: High-vacuum compatible designs - **Cryogenic Fittings**: Low-temperature service components --- ### **6. PRODUCT APPLICATIONS** #### **6.1 Semiconductor Manufacturing** - **Gas Distribution Systems**: High-purity gas lines - **Vacuum Chamber Connections**: Ultra-high vacuum fittings - **Chemical Delivery Systems**: Corrosive fluid handling - **Wafer Processing Equipment**: Process chamber components #### **6.2 Aerospace & Defense** - **Avionics Cooling Systems**: Thermal management fittings - **Fuel System Components**: Aircraft fuel line fittings - **Cryogenic Systems**: Liquid gas transfer components - **Radar Waveguide Assemblies**: RF transmission fittings #### **6.3 Scientific Instruments** - **Electron Microscope Components**: Vacuum system fittings - **Particle Accelerator Systems**: Beam line components - **Laboratory Instrumentation**: Precision fluid handling - **Research Equipment**: Specialized connection systems #### **6.4 Power Generation** - **Nuclear Instrumentation**: Radiation monitoring fittings - **Solar Cell Manufacturing**: Process equipment components - **Power Electronics Cooling**: Thermal management systems --- ### **7. TECHNICAL SPECIFICATIONS** #### **7.1 Size Range** - **Pipe Size**: 1/8" to 12" NPS (DN6 to DN300) - **Wall Thickness**: Schedule 5S to Schedule 80 - **Pressure Class**: 150# to 1500# - **End Connections**: Butt weld, socket weld, threaded, flanged #### **7.2 Manufacturing Standards** - **Dimensional**: ASME B16.9, B16.11, B16.28 - **Tolerance**: Standard and special tolerances available - **Testing**: Hydrostatic, pneumatic, NDT testing - **Certification**: PED 2014/68/EU, NACE MR0175 #### **7.3 Material Condition** - **Solution Annealed**: 750-850°C, rapid cooling - **Stress Relieved**: 500-600°C, controlled cooling - **Surface Finish**: Pickled, passivated, or electropolished - **Marking**: Laser etched per ASTM A960 --- ### **8. QUALITY ASSURANCE** #### **8.1 Material Certification** - **Chemical Analysis**: Certified ladle and product analysis - **Mechanical Tests**: Tensile, hardness, and impact testing - **Metallurgical Tests**: Grain size and microstructure examination - **Traceability**: Full material history from melt to finished part #### **8.2 Dimensional Control** - **First Article Inspection**: Comprehensive dimensional verification - **Statistical Process Control**: Ongoing production monitoring - **Surface Inspection**: 100% visual and surface finish check - **Documentation**: Complete inspection records maintained #### **8.3 Testing & Certification** - **Non-Destructive Testing**: RT, UT, MT, PT as required - **Pressure Testing**: Hydrostatic and pneumatic testing - **Leak Testing**: Helium leak detection for vacuum applications - **Certification**: EN 10204 3.1/3.2 material certificates --- ### **9. TECHNICAL ADVANTAGES** - **Perfect CTE Match**: Compatible with glass and ceramic systems - **Excellent Weldability**: Compatible with all standard welding methods - **Superior Corrosion Resistance**: Suitable for most chemical environments - **High Temperature Capability**: Service up to 400°C continuous - **Vacuum Compatibility**: Low outgassing characteristics - **Cryogenic Performance**: Maintains properties down to -196°C --- ### **10. INSTALLATION & SERVICE** #### **10.1 Welding Recommendations** - **Process**: GTAW (TIG) preferred for critical applications - **Filler Metal**: Matching composition or nickel-based alloys - **Preheat/Postheat**: Generally not required for thin sections - **Shielding Gas**: Argon or argon/hydrogen mixtures #### **10.2 Handling & Storage** - **Clean Handling**: White gloves recommended for precision components - **Storage Conditions**: Dry, temperature-controlled environment - **Protection**: Plastic end caps and VCI packaging - **Shelf Life**: Indefinite with proper storage conditions #### **10.3 Maintenance** - **Cleaning**: Solvent cleaning for high-purity applications - **Inspection**: Regular visual and dimensional checks - **Replacement**: Easy replacement due to standard dimensions - **Service Life**: Extended service life in proper applications --- **Note:** For critical applications involving high vacuum, ultra-high purity, or extreme temperatures, consult our technical team for specific material preparation and handling recommendations. Custom fitting designs and special testing protocols available upon request.

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 2451 gallon liquid totes Special package is available on request.