Alloy 45,Low expansion 45 Alloy Foil,Shim,,E FORU

British Specs:，American Specs:，German Specs:

**PRODUCT DATASHEET: ALLOY 45 / LOW EXPANSION 45 ALLOY FOIL & SHIM** **Precision Thin Products** --- ### **1. OVERVIEW** **Alloy 45**, commercially known as **Low Expansion 45 Alloy**, is a specialized **nickel-iron alloy** containing **45% nickel** that delivers a **controlled coefficient of thermal expansion (CTE)** between traditional low-expansion alloys and standard thin materials. Supplied as **precision foil and shim stock**, these thin-gauge products offer exceptional dimensional stability for applications requiring minimal thickness with intermediate thermal expansion characteristics and precise geometrical control. --- ### **2. CHEMICAL COMPOSITION (Weight %)** | Element | Alloy 45 Foil & Shim Specification | Typical Range | |------------------|-----------------------------------|---------------| | **Nickel (Ni)** | 44.0 – 46.0% | 44.5 – 45.5% | | **Iron (Fe)** | Balance | Balance | | **Manganese (Mn)**| 0.30 – 0.70% | 0.40 – 0.60% | | **Silicon (Si)** | 0.15 – 0.30% | 0.20 – 0.25% | | **Carbon (C)** | ≤ 0.05% | ≤ 0.03% | | **Chromium (Cr)**| ≤ 0.15% | ≤ 0.10% | | **Copper (Cu)** | ≤ 0.05% | ≤ 0.03% | | **Aluminum (Al)**| ≤ 0.05% | ≤ 0.03% | | **Sulfur (S)** | ≤ 0.015% | ≤ 0.010% | | **Phosphorus (P)**| ≤ 0.015% | ≤ 0.010% | --- ### **3. PHYSICAL & MECHANICAL PROPERTIES** | Property | Foil (≤0.1mm) | Shim (0.1-0.5mm) | Shim (0.5-1.0mm) | |---------------------------------|--------------------|--------------------|--------------------| | **CTE (20–300°C)** | 6.5 – 7.5 × 10⁻⁶/°C | 6.5 – 7.5 × 10⁻⁶/°C | 6.5 – 7.5 × 10⁻⁶/°C | | **Density (g/cm³)** | 8.17 | 8.17 | 8.17 | | **Tensile Strength (MPa)** | 480 – 580 | 500 – 600 | 520 – 620 | | **Yield Strength (MPa)** | 380 – 480 | 350 – 450 | 320 – 420 | | **Elongation (%)** | 8 – 15 | 12 – 20 | 15 – 25 | | **Hardness (HV)** | 170 – 210 | 160 – 200 | 150 – 190 | | **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 Organization | Designation & Specification | |-----------------------|----------------------------| | **Proprietary** | Alloy 45, Nilo 45 | | **Custom Standards** | Customer-specific specifications | | **Similar Standards** | Based on ASTM B749 framework | | **European** | Similar to Ni45Fe series | | **Japanese** | Similar to C45N series | --- ### **5. PRODUCT SPECIFICATIONS** #### **5.1 Foil Products** - **Thickness Range**: 0.015 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 & Electrical** - **Specialized Lead Frames**: Custom electronic packaging - **Electronic Shielding**: EMI/RFI shielding components - **Flex Circuit Bases**: Support layers for flexible circuits - **Hybrid Circuit Substrates**: Intermediate CTE applications #### **6.2 Precision Instruments** - **Sensor Mounting Shims**: Precision alignment applications - **Instrumentation Spacers**: Dimensional control elements - **Optical System Shims**: Intermediate expansion alignment - **Measuring Device Components**: Calibration references #### **6.3 Thermal Management** - **Heat Spreader Interfaces**: Thermal joint applications - **Thermal Barrier Components**: Intermediate expansion barriers - **Heat Sink Shims**: Custom thermal interface materials - **Temperature Compensation**: Thermal stress management #### **6.4 Industrial Applications** - **Glass-to-Metal Seals**: Intermediate expansion sealing - **Precision Mechanism Shims**: Timing and control devices - **Compensation Elements**: Thermal stress compensation - **Transition Components**: CTE bridging applications --- ### **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 customer 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**: 6-9% 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**: 800-850°C in protective atmosphere - **Stress Relieving**: 550-600°C for formed components - **Atmosphere Control**: Hydrogen or vacuum recommended - **Quenching**: Controlled 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**: Available for critical applications - **ESD Protection**: Anti-static packaging for electronic applications - **Moisture Control**: Desiccant and humidity indicator cards - **Custom Packaging**: Tailored to customer requirements --- **Note:** Alloy 45 foil and shim products are typically supplied against specific customer requirements. 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 2480 gallon liquid totes Special package is available on request.