Invar 36,Super Invar 32-5 Foil,Shim,UNS K93050,E FORU

British Specs:，American Specs: ASTM F1684 MIL-S-16598 Tooling plate ASTM B388 Sheet & strip ASTM B753 K93050 Free-cut Invar，German Specs:WS 1.3912

**Product Datasheet: Invar 36 & Super Invar 32-5 (UNS K93050) Foil & Shim** **1. Overview** Invar 36 and Super Invar 32-5 foils and shims represent the thinnest available forms of these renowned low thermal expansion alloys. These precision-rolled products maintain the exceptional dimensional stability characteristic of Invar materials while offering unique advantages for applications requiring minimal thickness and maximum precision. • **Invar 36 Foil/Shim**: Standard alloy available in thicknesses from 0.001" to 0.020" (0.025 mm to 0.50 mm) • **Super Invar 32-5 Foil/Shim**: Premium low-CTE variant for ultra-precision applications • **Custom Shims**: Pre-cut shapes and precision stamped components **2. Chemical Composition (Weight %)** | Element | Invar 36 (ASTM F1684) | Super Invar 32-5 (ASTM F1684) | |---------------|-----------------------|-------------------------------| | Nickel (Ni) | 35.0-37.0% | 31.5-32.5% | | Iron (Fe) | Balance | Balance | | Cobalt (Co) | ≤ 0.5% | 4.8-5.4% | | Carbon (C) | ≤ 0.05% | ≤ 0.05% | | Manganese (Mn)| ≤ 0.35% | ≤ 0.35% | | Silicon (Si) | ≤ 0.25% | ≤ 0.25% | | Chromium (Cr) | ≤ 0.20% | ≤ 0.20% | | Sulfur (S) | ≤ 0.02% | ≤ 0.02% | | Phosphorus (P)| ≤ 0.02% | ≤ 0.02% | **3. Physical & Mechanical Properties** | Property | Invar 36 Foil | Super Invar 32-5 Foil | |-------------------------------|----------------------|-----------------------| | CTE (20-100°C) | 1.6 × 10⁻⁶/°C | 0.6 × 10⁻⁶/°C | | Density (g/cm³) | 8.11 | 8.13 | | Thickness Range | 0.001-0.020" | 0.001-0.020" | | | (0.025-0.50 mm) | (0.025-0.50 mm) | | Tensile Strength (MPa) | 517-690 | 552-724 | | Yield Strength (MPa) | 414-552 | 448-586 | | Elongation (%) | 15-25 | 12-20 | | Hardness (Rockwell B) | 80-95 HRB | 85-100 HRB | | Surface Roughness (Ra) | 0.2-0.8 μm | 0.2-0.8 μm | | Flatness Tolerance | ±0.001"/inch | ±0.001"/inch | **4. International Standards** | Standard Type | Invar 36 | Super Invar 32-5 | |------------------------|--------------------|---------------------| | Material Standard | ASTM F1684 | ASTM F1684 | | UNS Designation | **K93600** | **K94600** | | Foil Specifications | ASTM B749 | ASTM B749 | | Thickness Tolerance | ASTM B750 | ASTM B750 | | European Standard | EN 1.3912 | EN 1.3981 | | Japanese Standard | JIS Cactus 7 | - | **5. Available Forms & Configurations** **5.1 Foil Products** - Standard rolls: 25 mm to 600 mm width - Precision slit strips: ±0.05 mm width tolerance - Custom widths available with tight tolerances **5.2 Shim Products** - Standard sheets: 300 × 300 mm to 600 × 1200 mm - Precision blanked parts - Laser-cut custom shapes - Etched components for electronics **5.3 Special Conditions** - Annealed (soft) condition for forming - Hard temper for spring applications - Stress-relieved for dimensional stability **6. Product Applications** **6.1 Electronics & Semiconductor** - Lead frames for high-power devices - Heat spreaders in microelectronics - Shadow masks for thin-film deposition - Wafer processing fixtures **6.2 Aerospace & Defense** - Thermal management shims - Gap fillers in satellite systems - Precision spacers in optical assemblies - Vibration damping components **6.3 Scientific Instruments** - Radiation baffles in telescopes - Thermal compensators in precision equipment - Cryogenic instrument shims - Laboratory apparatus spacers **6.4 Industrial Applications** - Molding press platens - Precision measurement equipment - Laser system components - Optical mounting shims **7. Technical Advantages** • **Exceptional Flatness**: Maintains dimensional stability in thin sections • **Consistent Thickness**: Tight tolerances for precision assembly • **Excellent Formability**: Can be stamped, bent, and formed to complex shapes • **Good Weldability**: Suitable for laser and resistance welding • **High Strength-to-Weight Ratio**: Ideal for weight-sensitive applications • **Thermal Stability**: Maintains properties across wide temperature range **8. Quality Assurance** - 100% thickness verification - Surface inspection for defects - Dimensional certification - Flatness measurement - Cleanroom packaging available - Lot traceability maintained **9. Special Features** • **Custom Coatings**: Available with protective coatings • **Perforated Patterns**: Precision etching and punching • **Temporary Backing**: Protective films for handling • **Slitting Services**: Precision width control to ±0.025 mm • **Blanket Orders**: Scheduled deliveries for production --- *Note: Foil and shim products require special handling to prevent damage. Technical consultation recommended for specific application requirements. Minimum order quantities may apply for custom configurations.*

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 2441 gallon liquid totes Special package is available on request.