Alloy 42,Nilo 42 Foil,Shim,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 FOIL & SHIM** **UNS K94100 - Precision Thin Products** --- ### **1. OVERVIEW** Alloy 42 (commercially known as **Nilo 42**) is a **nickel-iron alloy** with precisely controlled **42% nickel content**, engineered to provide a **thermal expansion coefficient** that perfectly matches **borosilicate glass, alumina ceramics, and semiconductor materials**. Supplied as **precision foil and shim stock**, these thin-gauge products deliver exceptional dimensional stability and thermal compatibility for applications requiring minimal thickness with maximum precision. The alloy is registered under the Unified Numbering System as **UNS K94100**. --- ### **2. CHEMICAL COMPOSITION (Weight %)** | Element | Alloy 42 / Nilo 42 Foil & Shim | 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 | Foil (≤0.1mm) | Shim (0.1-0.5mm) | Shim (0.5-1.0mm) | |---------------------------------|--------------------|--------------------|--------------------| | **CTE (20–300°C)** | 4.5 – 5.5 × 10⁻⁶/°C | 4.5 – 5.5 × 10⁻⁶/°C | 4.5 – 5.5 × 10⁻⁶/°C | | **Density (g/cm³)** | 8.11 | 8.11 | 8.11 | | **Tensile Strength (MPa)** | 450 – 550 | 480 – 580 | 500 – 600 | | **Yield Strength (MPa)** | 350 – 450 | 320 – 420 | 300 – 400 | | **Elongation (%)** | 8 – 15 | 12 – 20 | 15 – 25 | | **Hardness (HV)** | 160 – 200 | 150 – 190 | 140 – 180 | | **Surface Roughness (Ra, μm)** | 0.1 – 0.3 | 0.2 – 0.4 | 0.3 – 0.6 | | **Flatness (mm/m)** | ≤ 3 | ≤ 2 | ≤ 1 | --- ### **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 | | **Thin Product Standards** | ASTM B749, ASTM B750 | --- ### **5. PRODUCT SPECIFICATIONS** #### **5.1 Foil Products** - **Thickness Range**: 0.012 mm to 0.10 mm (±0.002 mm) - **Width Range**: 2 mm to 300 mm (±0.05 mm) - **Length**: Coils up to 5000 meters, cut lengths available - **Temper**: Annealed (soft) for formability #### **5.2 Shim Products** - **Thickness Range**: 0.10 mm to 1.00 mm (±0.005 mm) - **Width Range**: 10 mm to 600 mm (±0.1 mm) - **Standard Sheets**: 300 × 300 mm to 600 × 1200 mm - **Temper Conditions**: Annealed, 1/4 hard, 1/2 hard #### **5.3 Special Configurations** - **Precision Blanks**: Laser-cut or blanked components - **Etched Patterns**: Precision chemical etched features - **Perforated Materials**: Custom hole patterns and arrays - **Laminated Products**: Multi-layer composite shims --- ### **6. PRODUCT APPLICATIONS** #### **6.1 Electronics & Semiconductor** - **Lead Frame Substrates**: IC and transistor packaging - **Electronic Shielding**: EMI/RFI shielding components - **Flex Circuit Bases**: Support layers for flexible circuits - **Semiconductor Wafer**: Processing shims and spacers #### **6.2 Automotive Electronics** - **Sensor Mounting Shims**: Precision alignment shims - **ECU Component Spacers**: Electronic control unit spacers - **Ignition System Parts**: Thin insulating components - **Connector Shims**: Electrical connector interfaces #### **6.3 Aerospace & Defense** - **Avionics Shimming**: Precision alignment and spacing - **Radar Component Shields**: RF shielding applications - **Instrumentation Foils**: Thin structural components - **Optical System Shims**: Precision optical alignment #### **6.4 Industrial Applications** - **Glass-to-Metal Seals**: Hermetic sealing components - **Thermal Management**: Heat spreader and sink interfaces - **Precision Mechanisms**: Timing shims and spacers - **Measurement Equipment**: Calibration and reference standards --- ### **7. TECHNICAL ADVANTAGES** #### **7.1 Dimensional Excellence** - **Tight Thickness Control**: Consistent gauge throughout - **Superior Flatness**: Minimal waviness and distortion - **Precision Width Tolerance**: Optimized for automated handling - **Burr-Free Edges**: Clean edges for precision assembly #### **7.2 Material Performance** - **Excellent Formability**: Can be bent, stamped, and formed - **Good Weldability**: Suitable for laser and resistance welding - **Thermal Stability**: Maintains properties across temperature ranges - **Corrosion Resistance**: Suitable for most industrial environments #### **7.3 Processing Characteristics** - **Photoetching Compatibility**: Ideal for precision etching - **Plating Readiness**: Excellent surface for various coatings - **Cleanliness**: Low particle generation and contamination - **Handling Properties**: Good mechanical handling characteristics --- ### **8. QUALITY ASSURANCE** #### **8.1 Dimensional Verification** - **Thickness Measurement**: Laser scanning at multiple points - **Width Control**: Continuous monitoring during slitting - **Surface Inspection**: 100% visual inspection for defects - **Flatness Testing**: Automated flatness measurement systems #### **8.2 Material Certification** - **Chemical Analysis**: Certified for each melt heat - **Mechanical Testing**: Regular tensile and hardness verification - **Surface Quality**: Controlled per ASTM A480 requirements - **Traceability**: Complete lot traceability maintained #### **8.3 Special Testing** - **CTE Verification**: Precision thermal expansion measurement - **Cleanliness Testing**: Particle count for critical applications - **Surface Analysis**: SEM/EDS for surface characterization - **Bend Testing**: Formability and ductility verification --- ### **9. PROCESSING & FABRICATION** #### **9.1 Stamping & Blanking** - **Tool Clearance**: 5-8% of material thickness - **Punch-Die Alignment**: Critical for burr-free edges - **Lubrication**: Recommended for high-volume production - **Tool Materials**: Carbide tools for extended life #### **9.2 Etching & Chemical Processing** - **Etchants**: Ferric chloride and cupric chloride compatible - **Etch Factor**: Typically 1:1 to 1:1.5 - **Masking**: Photoresist and screen printing suitable - **Tolerance**: ±0.01 mm for precision etched features #### **9.3 Heat Treatment** - **Annealing**: 750-850°C in protective atmosphere - **Stress Relieving**: 400-500°C for formed components - **Atmosphere Control**: Hydrogen or vacuum recommended - **Quenching**: Rapid cooling for optimal properties --- ### **10. PACKAGING & HANDLING** #### **10.1 Standard Packaging** - **Foil Coils**: Plastic cores with protective wrapping - **Shim Sheets**: Interleaved with protective paper - **Cut Parts**: Stacked in anti-static containers - **Identification**: Clear labeling with full specifications #### **10.2 Special Handling** - **Cleanroom Packaging**: Class 1000 environment available - **ESD Protection**: Anti-static packaging for electronic applications - **Moisture Control**: Desiccant and humidity indicator cards - **Custom Packaging**: Tailored to customer requirements --- **Note:** For critical applications involving fine features or tight tolerances, consultation with our technical team is recommended to optimize material selection and processing parameters. Sample material and technical support available for process development and validation.

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 2454 gallon liquid totes Special package is available on request.