Alloy 475,Nilo 475 Sheet,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) - Sheet Product Overview** **Alloy 475**, commercially known as **Nilo 475**, is a nickel-iron-cobalt controlled expansion alloy specifically designed for matched sealing with special hard glasses and certain ceramic materials. The **Sheet** form provides thin, flat material for applications requiring unique thermal expansion compatibility while offering good formability and consistent mechanical properties. * **UNS Designation:** **K95000** * **Common Names:** Nilo 475 Sheet, Glass Sealing 475 Sheet --- #### **1. Chemical Composition** Precisely controlled chemistry ensures consistent thermal performance in sheet form. | Element | Percentage (%) | Role in the Alloy | |:---|:---|:---| | **Nickel (Ni)** | 46.0 - 48.0 | Primary element controlling CTE characteristics | | **Cobalt (Co)** | 24.0 - 26.0 | Modifies thermal expansion properties | | **Iron (Fe)** | Balance | Base structural element | | **Manganese (Mn)** | 0.10 - 0.30 | Enhances rolling and forming characteristics | | **Silicon (Si)** | 0.10 - 0.30 | Improves glass/ceramic wetting performance | | **Carbon (C)** | 0.05 max | Limited for optimal formability | | **Sulfur (S)** | 0.02 max | Controlled impurity | | **Phosphorus (P)** | 0.02 max | Controlled impurity | --- #### **2. Physical Properties** Optimized properties for sheet applications and special material sealing. | Property | Value / Condition | Notes | |:---|:---|:---| | **Density** | 8.35 g/cm³ (0.302 lb/in³) | Higher due to cobalt content | | **Melting Point** | ~1445 °C (2635 °F) | | | **Thermal Expansion Coefficient** | 20-300°C: 7.8-8.5 μm/m·°C
20-400°C: 8.2-9.0 μm/m·°C | Unique CTE for special applications | | **Curie Temperature** | ~420 °C (790 °F) | Modified by cobalt addition | | **Thermal Conductivity** | 14.5 W/m·K at 20°C | | | **Electrical Resistivity** | 0.52 μΩ·m at 20°C | | | **Specific Heat** | 0.45 J/g·°C at 20°C | | --- #### **3. Mechanical Properties** Properties vary with thickness and temper condition. | Thickness (mm) | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |:---|:---|:---|:---|:---| | 0.1-0.5 | Annealed | 520-590 | 280-350 | 20-30 | | 0.5-1.0 | Annealed | 530-600 | 290-360 | 25-35 | | 1.0-3.0 | Annealed | 530-600 | 290-360 | 25-35 | | 3.0-6.0 | Annealed | 540-610 | 300-370 | 25-35 | --- #### **4. Product Specifications & Applications** **Sheet Specifications:** * **Thickness Range:** 0.1 mm to 6.0 mm * **Width Range:** 100 mm to 600 mm * **Length:** Standard coils or cut lengths * **Thickness Tolerance:** ±5% standard, ±3% available * **Surface Finish:** 0.8 μm Ra standard, 0.4 μm Ra available **Temper Conditions:** * **Annealed:** Good formability for drawing operations * **Quarter Hard:** Balanced formability and strength * **Half Hard:** Increased strength with moderate formability * **Full Hard:** Maximum strength, limited formability **Primary Applications:** **Electronics & Electrical:** * **Special Electronic Package Lids:** Hermetic seals for unique glass systems * **RF/Microwave Housings:** Enclosures for specialized frequency components * **Power Device Bases:** Mounting surfaces for specialized power electronics * **Sensor Diaphragms:** Thin sensing elements with special glass seals **Industrial & Scientific:** * **Advanced Optical Component Mounts:** Precision frames for special optical systems * **Laboratory Equipment:** Specialized apparatus requiring unique CTE matching * **Instrument Panels:** Control surfaces with specialized glass viewports * **Vacuum System Components:** Sealing flanges for unique applications **Aerospace & Defense:** * **Special Avionics Housings:** Electronic enclosures for unique aircraft systems * **Satellite Components:** Space-qualified packages with special requirements * **Military Electronics:** Ruggedized enclosures for advanced defense applications --- #### **5. International Standards** Comprehensive international specifications for sheet products. | Standard Type | Standard Number | Title / Specification | |:---|:---|:---| | **ASTM** | **ASTM F15** | Standard Specification for Iron-Nickel Sealing Alloys | | **UNS** | **K95000** | Unified Numbering System Designation | | **AMS** | AMS 7724 | Aerospace Material Specification | | **ASTM** | ASTM B48 | Standard Specification for Nickel Alloy Sheet | | **DIN** | DIN 1745 | Metallic Materials for Glass-to-Metal Seals | | **ISO** | ISO 9711 | Metallic Materials for Glass-to-Metal Seals | --- #### **6. Manufacturing & Processing** **Forming Characteristics:** * **Deep Drawing:** Good in annealed condition * **Stamping:** Suitable for production operations * **Bending:** Minimum bend radius 1.5x thickness (annealed) * **Blank Size:** Practical limits based on thickness and equipment **Heat Treatment:** * **Annealing:** 850-900°C in protective atmosphere * **Stress Relieving:** 650-750°C after forming operations * **Continuous Annealing:** Available for coil products **Surface Preparation:** * **Cleaning:** Essential for optimal sealing performance * **Plating Options:** Copper, nickel, or specialty coatings * **Pre-oxidation:** Controlled surface treatment for glass sealing * **Surface Finish:** Critical for consistent material adherence --- #### **7. Quality Assurance** * **Dimensional Control:** Thickness, width, and flatness verification * **Surface Inspection:** Visual and automated surface quality assessment * **Mechanical Testing:** Tensile and hardness testing per lot * **Flatness Standards:** ≤3 mm per meter for most applications * **Certification:** Full material traceability with test reports --- **Summary** **Alloy 475 (Nilo 475) Sheet (UNS K95000)** provides a specialized thin-gauge material solution for applications requiring reliable sealing with special glasses and certain ceramics. Its unique thermal expansion properties, enhanced by cobalt content, combined with good formability and consistent quality, make it ideal for specialized electronic packaging, aerospace components, scientific instruments, and advanced industrial equipment. The sheet form enables manufacturing of complex components through stamping, drawing, and forming processes while maintaining critical thermal expansion matching with special materials. Compliance with **ASTM F15** and other international standards ensures material consistency and performance reliability for demanding applications where hermetic integrity and unique thermal expansion control are essential.

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 2527 gallon liquid totes Special package is available on request.