Alloy 475,Nilo 475 Plate,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) - Plate 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 **Plate** form provides flat, dimensionally stable stock material for manufacturing components requiring unique thermal expansion compatibility in various high-reliability applications. * **UNS Designation:** **K95000** * **Common Names:** Nilo 475 Plate, Glass Sealing 475 Plate --- #### **1. Chemical Composition** Precisely controlled chemistry ensures consistent thermal expansion properties in plate form. | Element | Percentage (%) | Role in the Alloy | |:---|:---|:---| | **Nickel (Ni)** | 46.0 - 48.0 | Controls 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 hot rolling characteristics | | **Silicon (Si)** | 0.10 - 0.30 | Improves glass/ceramic wetting performance | | **Carbon (C)** | 0.05 max | Limited for optimal machinability and stability | | **Sulfur (S)** | 0.02 max | Controlled impurity | | **Phosphorus (P)** | 0.02 max | Controlled impurity | --- #### **2. Physical Properties** Specialized properties optimized for plate 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 | Matches special glass/ceramic expansion | | **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 (Annealed Condition)** **Plate Mechanical Characteristics:** * **Tensile Strength:** 530-600 MPa (77-87 ksi) * **Yield Strength (0.2% Offset):** 290-360 MPa (42-52 ksi) * **Elongation:** 20-30% in 2 inches * **Hardness:** 73-88 HRB * **Modulus of Elasticity:** 158 GPa (22.9 × 10⁶ psi) * **Shear Strength:** 430 MPa (62 ksi) * **Fatigue Strength:** 260 MPa (38 ksi) at 10⁸ cycles --- #### **4. Product Specifications & Applications** **Plate Specifications:** * **Thickness Range:** 5.0 mm to 100 mm * **Width Range:** 200 mm to 1500 mm * **Length Range:** 1000 mm to 3000 mm * **Thickness Tolerance:** ±5% standard, ±3% available * **Flatness:** ≤3 mm per meter standard * **Surface Finish:** 3.2 μm Ra standard, 1.6 μm Ra available **Types Available:** * **Hot Rolled Plate:** For general applications * **Annealed Plate:** Stress-relieved for machining stability * **Pre-oxidized Plate:** Ready for immediate glass sealing * **Machined Plate:** Precision surface finished for critical applications **Primary Applications:** **Electronics & Electrical Applications:** * **Special Electronic Package Bases:** Substrates for unique glass sealing requirements * **Microwave Component Mounting:** Precise mounting plates for specialized RF systems * **Vacuum Chamber Flanges:** Large sealing surfaces for specialized applications * **Power Tube Headers:** Base plates for specialized electronic tubes **Industrial & Scientific Applications:** * **Advanced Optical Bench Components:** Stable mounting platforms for special optical systems * **Laboratory Equipment Bases:** Precision reference surfaces for unique applications * **Instrumentation Plates:** Stable bases for specialized scientific instruments * **Laser System Components:** Mounting plates for advanced laser systems **Aerospace & Defense:** * **Special Avionics Mounting Plates:** Stable platforms for unique aircraft electronics * **Satellite Component Bases:** Structural elements for specialized space applications * **Military Electronics Housings:** Enclosure components for advanced defense systems --- #### **5. International Standards** Comprehensive international specifications for plate 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 Plate | | **DIN** | DIN 1745 | Metallic Materials for Glass-to-Metal Seals | | **ISO** | ISO 9711 | Metallic Materials for Glass-to-Metal Seals | --- #### **6. Manufacturing & Processing** **Machining Characteristics:** * **Machinability Rating:** 35% (compared to free-cutting brass) * **Recommended Tools:** Carbide tools with positive rake angles * **Cutting Speed:** 25-40 m/min for milling operations * **Feed Rate:** 0.1-0.3 mm/tooth for milling * **Coolant Requirements:** Essential for optimal surface finish **Heat Treatment:** * **Annealing Temperature:** 850-900°C in protective atmosphere * **Stress Relieving:** 650-750°C after heavy machining * **Cooling Rate:** Controlled cooling ≤50°C per hour for thick plates **Sealing Preparation:** * **Surface Preparation:** Critical cleaning and surface activation * **Flatness Control:** Essential for uniform glass/ceramic sealing * **Surface Finish:** 0.8-3.2 μm Ra optimal for material adherence * **Sealing Parameters:** 900-1000°C with controlled atmosphere --- #### **7. Quality Assurance** * **Chemical Certification:** Mill certificate with heat analysis * **Dimensional Verification:** Thickness, flatness, and dimensional checks * **Surface Quality:** Visual inspection and surface roughness measurement * **Ultrasonic Testing:** For internal quality assessment of thick plates * **Mechanical Testing:** Tensile and hardness testing per ASTM standards * **Flatness Verification:** Precision measurement across entire plate surface --- **Summary** **Alloy 475 (Nilo 475) Plate (UNS K95000)** provides stable, flat stock material for manufacturing components requiring reliable sealing with special glasses and certain ceramics. Its unique thermal expansion properties, enhanced by cobalt content, combined with good dimensional stability and machinability, make it essential for specialized applications in advanced electronics, aerospace, scientific instrumentation, and specialized industrial equipment. The plate form enables the creation of large, stable sealing surfaces and structural components where maintaining precise dimensional relationships under thermal cycling with special materials is crucial. Compliance with **ASTM F15** and other international standards ensures material consistency and performance reliability for demanding specialized applications across multiple high-technology industries.

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 2526 gallon liquid totes Special package is available on request.