Invar 36,Super Invar 32-5 Foil,Shim,UNS K93603,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

**Super Invar 32-5 Foil & Shim (UNS K93603) - Technical Product Introduction** --- ### **Overview** **Super Invar 32-5 Foil & Shim** (UNS K93603) represents the ultra-thin product forms of the advanced iron-nickel-cobalt alloy, offering the lowest coefficient of thermal expansion among commercially available metal alloys in foil and shim configurations. These precision materials maintain exceptional dimensional stability while providing excellent formability and precise thickness control for critical thermal management applications. --- ### **1. Chemical Composition (%)** | Element | Content | |---------|---------| | **Nickel (Ni)** | 31.5-33.0 | | **Cobalt (Co)** | 4.5-5.5 | | **Iron (Fe)** | Balance | | **Carbon (C)** | ≤0.05 | | **Manganese (Mn)** | ≤0.50 | | **Silicon (Si)** | ≤0.20 | | **Phosphorus (P)** | ≤0.015 | | **Sulfur (S)** | ≤0.015 | | **Chromium (Cr)** | ≤0.15 | | **Aluminum (Al)** | ≤0.10 | --- ### **2. Physical Properties** | Property | Value | |----------|-------| | **Density** | 8.10 g/cm³ | | **Melting Point** | 1430°C | | **Coefficient of Thermal Expansion** | **0.5-0.8 × 10⁻⁶/°C** (20-100°C) | | **Thermal Conductivity** | 10.0 W/m·K | | **Specific Heat Capacity** | 500 J/kg·K | | **Modulus of Elasticity** | 147 GPa | | **Electrical Resistivity** | 0.80 μΩ·m | | **Curie Temperature** | 250°C | --- ### **3. Mechanical Properties** | Property | Foil (Annealed) | Shim (Hard) | |----------|-----------------|-------------| | **Tensile Strength** | 460-530 MPa | 580-680 MPa | | **Yield Strength (0.2%)** | 260-330 MPa | 520-620 MPa | | **Elongation** | 25-35% | 8-15% | | **Hardness** | 70-80 HRB | 90-100 HRB | --- ### **4. Product Specifications** **Foil Products:** - **Thickness Range:** 0.01 mm to 0.15 mm - **Width Range:** 50 mm to 300 mm - **Standard Tolerance:** ±0.003 mm - **Surface Finish:** Bright annealed or matte finish **Shim Products:** - **Thickness Range:** 0.05 mm to 1.0 mm - **Width Range:** 10 mm to 600 mm - **Standard Tolerance:** ±0.008 mm - **Available Forms:** Sheets, custom shapes, precision blanks --- ### **5. Product Applications** **Advanced Electronics:** - **Semiconductor Packaging:** Ultra-stable lead frames and substrates - **MEMS Devices:** Precision mounting foils and spacers - **Quantum Computing:** Stable mounting elements for qubit systems - **High-Frequency Circuits:** Dimensionally stable circuit bases **Aerospace & Defense:** - **Satellite Components:** Thin thermal management layers - **Optical Systems:** Precision alignment shims and spacers - **Avionics:** Stable mounting foils for sensitive electronics - **Cryogenic Systems:** Low-temperature sealing shims **Precision Instrumentation:** - **Laser Systems:** Optical mounting and alignment foils - **Interferometers:** Reference shims and spacing elements - **Metrology Equipment:** Precision gauge shims - **Scientific Instruments:** Stable mounting components **Medical Technology:** - **Medical Imaging:** Stable components in MRI and CT systems - **Surgical Instruments:** Precision shims and spacers - **Diagnostic Equipment:** Dimensionally stable elements - **Implantable Devices:** Critical shim components --- ### **6. International Standards** | Standard Body | Standard Number | Description | |---------------|-----------------|-------------| | **ASTM** | ASTM F1684-06 | Standard Specification for Foil and Strip | | **UNS** | K93603 | Unified Numbering System | | **AMS** | AMS 7726 | Aerospace Material Specification | | **JIS** | JIS NCF 3 | Japanese Industrial Standard | | **GB** | GB 4J32 | Chinese National Standard | --- ### **7. Special Processing Characteristics** **Forming & Fabrication:** - **Minimum Bend Radius:** 1t (material thickness) - **Punch Clearance:** 5-8% of material thickness - **Deep Drawing:** Good in annealed condition - **Springback:** Predictable and consistent **Heat Treatment Protocol:** - **Solution Treatment:** 830-850°C in controlled atmosphere - **Stabilization:** 315-370°C for 30-60 minutes - **Stress Relieving:** 425-480°C after forming - **Atmosphere:** Hydrogen or vacuum recommended **Surface Treatments:** - **Electroplating:** Excellent for gold, nickel, tin plating - **Passivation:** Improved corrosion resistance - **Chemical Etching:** Precision patterning capability - **Special Coatings:** Thermal and protective coatings --- ### **8. Quality Assurance** **Testing Requirements:** - **CTE Verification:** Dilatometer testing per ASTM E228 - **Dimensional Control:** Laser micrometer measurement - **Surface Quality:** Microscopic inspection - **Flatness Testing:** Precision optical flat measurement **Certification:** - **Material Traceability:** Full manufacturing history - **Heat Treatment Records:** Complete thermal cycle documentation - **CTE Certification:** Batch-specific test data - **Cleanliness Certification:** For high-purity applications --- ### **9. Design Considerations** **Thermal Performance:** - CTE approximately 3× lower than standard Invar 36 - Optimal stability in room temperature range - Excellent performance under thermal cycling - Minimal hysteresis effects **Mechanical Design:** - Higher strength than standard Invar foils - Excellent fatigue resistance in thin sections - Good creep resistance at room temperature - Suitable for high-vacuum applications **Application Guidelines:** - **Storage:** Controlled environment to prevent deformation - **Handling:** Clean room conditions for critical applications - **Cleaning:** Suitable for standard cleaning methods - **Protection:** Corrosion protection in harsh environments --- ### **Conclusion** Super Invar 32-5 Foil and Shim (UNS K93603) provide an exceptional combination of ultra-low thermal expansion, precision manufacturing capabilities, and reliable performance in demanding thermal environments. Their availability in ultra-thin gauges with precise dimensional control makes them particularly valuable for advanced electronic, aerospace, and scientific applications where thermal management and dimensional stability at the microscopic level are critical. The material's consistent performance, coupled with its fabrication versatility, ensures reliable operation in the most demanding precision applications. While requiring careful processing and quality control, the material's superior thermal stability justifies its use in applications where conventional materials cannot meet the stringent requirements of modern technology.

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 2428 gallon liquid totes Special package is available on request.