Alloy 42,Nilo 42 Tube,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 TUBE** **UNS K94100 - Precision Tubing** --- ### **1. OVERVIEW** Alloy 42 (commercially known as **Nilo 42**) is a **nickel-iron alloy** containing approximately **42% nickel**, specifically engineered to provide a **thermal expansion coefficient** that closely matches **borosilicate glass, alumina ceramics, and semiconductor materials**. Manufactured as **precision tubing**, this product offers exceptional dimensional stability and thermal compatibility for critical applications in electronics, aerospace, and instrumentation. The alloy is registered under the Unified Numbering System as **UNS K94100**. --- ### **2. CHEMICAL COMPOSITION (Weight %)** | Element | Alloy 42 / Nilo 42 Tube | 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 | Seamless Tube (Annealed) | Welded Tube (Annealed) | |---------------------------------|--------------------------|------------------------| | **CTE (20–300°C)** | 4.5 – 5.5 × 10⁻⁶/°C | 4.5 – 5.5 × 10⁻⁶/°C | | **Density** | 8.11 g/cm³ | 8.11 g/cm³ | | **Melting Point** | 1420 – 1450°C | 1420 – 1450°C | | **Tensile Strength** | 500 – 600 MPa | 490 – 590 MPa | | **Yield Strength (0.2% Offset)**| 260 – 360 MPa | 250 – 350 MPa | | **Elongation (in 2")** | 30 – 40% | 28 – 38% | | **Modulus of Elasticity** | 145 GPa | 145 GPa | | **Hardness (Rockwell B)** | 65 – 80 HRB | 63 – 78 HRB | | **Electrical Resistivity** | 0.75 μΩ·m | 0.75 μΩ·m | | **Thermal Conductivity** | 14.5 W/m·K | 14.5 W/m·K | | **Maximum Service Temperature** | 400°C | 400°C | --- ### **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 | | **DIN** | Ni42 | | **Tube Standard** | ASTM B725/B726 | --- ### **5. PRODUCT APPLICATIONS** #### **Electronics & Semiconductor** - **Vacuum tube components** and housings - **Semiconductor process** gas delivery lines - **IC packaging** structural elements - **Thermal management** sleeves #### **Aerospace & Defense** - **Gyroscope** housings and components - **Avionics cooling** passages - **Radar waveguide** components - **Precision instrument** frames #### **Medical & Laboratory** - **MRI system** components - **Laboratory instrument** structures - **Medical laser** housings - **Analytical equipment** frames #### **Telecommunications** - **Fiber optic** alignment sleeves - **Microwave tube** components - **RF connector** housings - **Electronic package** enclosures --- ### **6. PRODUCT SPECIFICATIONS** #### **Seamless Tube** - **Outside Diameter**: 1.0 mm to 50 mm - **Wall Thickness**: 0.2 mm to 5.0 mm - **Length**: Standard 3-6 meters, custom lengths available - **Tolerance**: ±0.05 mm OD, ±0.03 mm wall #### **Welded & Drawn Tube** - **Outside Diameter**: 3 mm to 80 mm - **Wall Thickness**: 0.3 mm to 4.0 mm - **Length**: Standard 3-6 meters, custom lengths available - **Weld Quality**: Fully annealed and normalized --- ### **7. TECHNICAL ADVANTAGES** - **Perfect CTE Match** with glass and ceramic feedthroughs - **Excellent Dimensional Stability** during thermal cycling - **Superior Surface Finish** for precision applications - **Good Fabricability** for bending and forming - **High Strength-to-Weight Ratio** - **Excellent Hermetic Sealing** capabilities --- ### **8. FABRICATION CAPABILITIES** - **Bending**: Minimum bend radius 2× OD - **End Finishing**: Square cut, deburred, chamfered - **Welding**: TIG and laser welding compatible - **Heat Treatment**: Full annealing capability - **Surface Finish**: Bright annealed, polished, or coated --- ### **9. QUALITY ASSURANCE** - **Certification**: EN 10204 3.1/3.2 material certificates - **Testing**: Hydrostatic, eddy current, ultrasonic - **Dimensional Control**: Statistical process monitoring - **Surface Inspection**: 100% visual examination - **Traceability**: Complete mill-to-final product tracking --- ### **10. SPECIAL FEATURES** - **Ultra-Pure Versions**: Low gas content for vacuum applications - **Custom Sizes**: Tailored dimensions for specific applications - **Special Cleanliness**: Cleanroom packaging available - **Just-in-Time**: Scheduled delivery programs --- **Note:** For critical applications involving glass-to-metal seals or ceramic interfaces, specific thermal processing may be required. Consult our technical team for application-specific recommendations and processing guidelines.

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 2447 gallon liquid totes Special package is available on request.