Alloy 475,Nilo 475 Foil,Shim,UNS K95000,E FORU

British Specs:，American Specs:AMS 7718 Bar, Tube and Forgings MIL-N-14411 Comp 3，German Specs:

### **Alloy 475 (Nilo 475) - Foil & Shim Product Overview** **Alloy 475**, commercially known as **Nilo 475**, is a nickel-iron-cobalt controlled expansion alloy specifically engineered for matched sealing with special hard glasses and certain ceramic materials. The **Foil** and **Shim** forms provide ultra-thin, precision materials for applications requiring minimal thickness while maintaining unique thermal expansion compatibility. * **UNS Designation:** **K95000** * **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)** | 46.0 - 48.0 | Controls CTE in constrained dimensions | | **Cobalt (Co)** | 24.0 - 26.0 | Modifies thermal expansion properties | | **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/ceramic 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** | 8.35 g/cm³ | Higher due to cobalt content | | **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: 7.8-8.5 μm/m·°C | Maintains unique CTE in thin dimensions | | **Curie Temperature** | ~420 °C | Modified by cobalt addition | | **Surface Roughness** | 0.1-0.4 μm Ra | Optimized for material 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 | 500-570 | 270-340 | 15-25 | | 0.05-0.1 | Annealed | 520-590 | 280-350 | 20-30 | | 0.1-0.25 | Annealed | 530-600 | 290-360 | 25-35 | | 0.25-0.5 | Annealed | 530-600 | 290-360 | 30-40 | --- #### **4. Product Forms & Specific Applications** **Foil Applications (≤0.1 mm):** * **Special Micro-electronic Packages:** Thin sealing lids for unique glass systems * **Advanced Capacitor Seals:** Ultra-thin sealing layers for specialized applications * **Medical Implant Barriers:** Thin protective layers in advanced implantable devices * **Optical Device Spacers:** Precision thickness control in specialized optical assemblies * **Battery Sealing Components:** Thin foil seals for advanced battery systems **Shim Applications (0.1-0.5 mm):** * **Special Thermal Expansion Compensators:** Precisely controlled thickness shims for unique CTE matching * **Electronic Package Spacers:** Maintaining precise gaps in specialized RF packages * **Glass-to-Metal Transition Layers:** Intermediate layers in complex sealing structures * **Sensor Mounting Shims:** Precision thickness for specialized sensors * **Vacuum Chamber Gaskets:** Thin seals for advanced 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 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 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 475 (Nilo 475) Foil and Shim (UNS K95000)** materials extend the application of this specialized sealing alloy with cobalt content to the thinnest possible dimensions while maintaining unique thermal expansion properties required for reliable sealing with special glasses and certain ceramics. The precision thickness control, 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 specialized performance requirements demand high-quality thin materials. Compliance with international standards ensures reliable performance in demanding applications requiring matched sealing with special materials.

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 2532 gallon liquid totes Special package is available on request.