Alloy 46,Glass sealing 46 Alloy Foil,Shim,UNS K94600,E FORU

British Specs:，American Specs: ASTM F30，German Specs:

### **Alloy 46 (Glass Sealing 46) - Foil & Shim Product Overview** **Alloy 46** is a controlled expansion iron-nickel alloy specifically engineered for creating reliable hermetic seals with soft glass. The **Foil** and **Shim** forms provide ultra-thin, precision materials for applications requiring minimal thickness while maintaining critical thermal expansion compatibility with glass. * **UNS Designation:** **K94600** * **Product Forms:** Foil (≤0.1 mm), Shim (0.1-0.5 mm), Precision Thin Strip --- #### **1. Chemical Composition** Precisely controlled chemistry ensures consistent thermal performance in thin sections. | Element | Percentage (%) | Role in Thin Sections | |:---|:---|:---| | **Nickel (Ni)** | 45.0 - 47.0 | Controls CTE in constrained dimensions | | **Iron (Fe)** | Balance | Maintains structural integrity in thin gauges | | **Manganese (Mn)** | 0.10 - 0.30 | Ensures consistent rollability to thin gauges | | **Silicon (Si)** | 0.10 - 0.30 | Enhances glass wetting in thin layers | | **Carbon (C)** | 0.05 max | Minimized for flexibility | | **Sulfur (S)** | 0.02 max | Controlled for surface quality | | **Phosphorus (P)** | 0.02 max | Controlled for ductility | --- #### **2. Physical Properties** Properties optimized for thin foil and shim applications. | Property | Value / Condition | Notes | |:---|:---|:---| | **Density** | 8.18 g/cm³ | Consistent in thin sections | | **Thickness Range** | 0.012 mm to 0.5 mm | Foil: ≤0.1 mm, Shim: 0.1-0.5 mm | | **Width Availability** | Up to 300 mm | Slit to precise widths | | **Thermal Expansion Coefficient** | 20-300°C: 9.2-9.8 μm/m·°C | Maintains CTE in thin dimensions | | **Curie Temperature** | ~430 °C | Critical for CTE behavior | | **Surface Roughness** | 0.1-0.4 μm Ra | Optimized for glass adhesion | --- #### **3. Mechanical Properties** Properties vary with thickness and temper condition. | Thickness (mm) | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |:---|:---|:---|:---|:---| | 0.012-0.05 | Annealed | 480-550 | 250-320 | 15-25 | | 0.05-0.1 | Annealed | 510-580 | 270-340 | 25-35 | | 0.1-0.25 | Annealed | 510-580 | 270-340 | 30-40 | | 0.25-0.5 | Annealed | 510-580 | 270-340 | 35-45 | --- #### **4. Product Forms & Specific Applications** **Foil Applications (≤0.1 mm):** * **Micro-electronic Packages:** Thin sealing lids for MEMS and micro-sensors * **Capacitor Seals:** Ultra-thin sealing layers in high-reliability capacitors * **Medical Implant Barriers:** Thin protective layers in implantable devices * **Optical Device Spacers:** Precision thickness control in optical assemblies * **Battery Sealing Components:** Thin foil seals for lithium and specialty batteries **Shim Applications (0.1-0.5 mm):** * **Thermal Expansion Compensators:** Precisely controlled thickness shims for CTE matching * **Electronic Package Spacers:** Maintaining precise gaps in RF and microwave packages * **Glass-to-Metal Transition Layers:** Intermediate layers in complex sealing structures * **Sensor Mounting Shims:** Precision thickness for optical and thermal sensors * **Vacuum Chamber Gaskets:** Thin seals for scientific instruments --- #### **5. International Standards** Compliance with thin material specifications. | Standard Type | Standard Number | Application | |:---|:---|:---| | **ASTM** | **ASTM F15** | Base material specification | | **ASTM** | ASTM B90 | Standard for foil and shim thickness tolerances | | **IEC** | IEC 60404-8-6 | Metallic magnetic materials | | **MIL-SPEC** | MIL-DTL-23488 | Sealing alloy requirements | | **ISO** | ISO 9445 | Tolerance standards for thin materials | --- #### **6. Special Features & Processing** **Unique Foil/Shim Characteristics:** * **Precision Thickness Control:** ±5% thickness tolerance standard, ±2% available * **Surface Finish Options:** Matte, bright, or specially prepared for glass sealing * **Plating Variants:** Copper, nickel, or gold plated versions available * **Slit Edge Quality:** Controlled edge condition for precision assembly * **Cleanliness:** Ultra-clean processing for critical electronic applications **Processing Guidelines:** * **Handling:** Requires careful handling to prevent creasing or damage * **Cutting:** Suitable for laser cutting, photochemical etching, and precision blanking * **Forming:** Can be formed into simple shapes in annealed condition * **Annealing:** Bright annealing available for critical surface applications --- #### **7. Quality Assurance** * **Dimensional Verification:** 100% thickness monitoring during production * **Surface Inspection:** Visual and automated surface defect detection * **Metallurgical Quality:** Grain size control for consistent formability * **Certification:** Full traceability with material certification to specifications --- **Summary** **Alloy 46 (UNS K94600) Foil and Shim** materials extend the application of this matched sealing alloy to the thinnest possible dimensions while maintaining the critical thermal expansion properties required for reliable glass-to-metal sealing. The precision thickness control, superior surface quality, and consistent mechanical properties make these ultra-thin forms essential for advanced microelectronics, medical devices, optical systems, and precision instrumentation where space constraints and exacting performance requirements demand the highest quality thin materials. Compliance with international standards ensures reliable performance in the most demanding applications.

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 2493 gallon liquid totes Special package is available on request.