Invar 36,Nilo 36 Forgings,UNS K93601,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

**Invar 36 / Nilo 36 Forgings (UNS K93601) - Technical Product Introduction** **1. Overview** Invar 36, commercially designated as Nilo 36 Forgings (UNS K93601), represents the forged product form of the nickel-iron controlled expansion alloy containing 36% nickel. These forgings are manufactured through controlled deformation processes that optimize grain structure and mechanical properties, making them particularly suitable for critical applications requiring exceptional dimensional stability under thermal cycling conditions. **2. Chemical Composition (%)** | Element | Content | |---------|---------| | Nickel (Ni) | 35.0-37.0 | | Iron (Fe) | Balance | | Carbon (C) | ≤0.10 | | Manganese (Mn) | ≤0.50 | | Silicon (Si) | ≤0.30 | | Phosphorus (P) | ≤0.025 | | Sulfur (S) | ≤0.025 | | Cobalt (Co) | ≤0.50 | | Chromium (Cr) | ≤0.25 | **3. Physical Properties** - Density: 8.13 g/cm³ - Melting Point: 1425°C - Mean Coefficient of Thermal Expansion: 1.6 × 10⁻⁶/°C (20-100°C) - Thermal Conductivity: 10.5 W/m·K at 20°C - Specific Heat Capacity: 515 J/kg·K - Modulus of Elasticity: 145 GPa - Curie Temperature: 230°C **4. Mechanical Properties (Annealed Condition)** - Tensile Strength: 480-550 MPa - Yield Strength (0.2% Offset): 280-350 MPa - Elongation: 30-40% - Reduction of Area: 55-65% - Hardness: 75-85 HRB **5. Manufacturing Process** Nilo 36 forgings are produced using either open-die or closed-die forging methods, followed by appropriate heat treatment to achieve the desired mechanical properties and dimensional stability. The forging process enhances: - Grain structure refinement - Mechanical strength - Directional properties - Internal soundness **6. Product Applications** **Aerospace & Defense** - Satellite structural components - Optical mounting systems - Radar system bases - Aircraft engine components **Semiconductor Manufacturing** - Wafer processing chamber components - Lithography system frames - Vacuum chamber flanges - Precision measurement equipment bases **Energy Sector** - LNG cryogenic components - Turbine structural elements - Nuclear instrumentation supports - Solar thermal system components **Scientific Research** - Telescope mirror cells - Particle accelerator components - Cryogenic research equipment - Precision instrument frames **7. International Standards** - ASTM F1684: Standard Specification for Iron-Nickel and Cobalt-Nickel Alloy Forgings - AMS 7724: Aerospace Material Specification for Forgings - ASME SA-658: Boiler and Pressure Vessel Code Specification - DIN 1.3912: German Standard for Forgings - EN 1.3912: European Standard **8. Quality Assurance** All Nilo 36 forgings undergo comprehensive quality control including: - Ultrasonic testing per ASTM A388 - Dimensional verification - Chemical analysis certification - Mechanical testing certification - Heat treatment documentation **9. Fabrication Characteristics** - Machinability: Good with proper tool geometry - Weldability: Excellent using GTAW process - Heat Treatment: Annealing at 830-880°C recommended - Stress Relieving: 425-540°C for 1-2 hours per inch thickness **10. Conclusion** Nilo 36 Forgings (UNS K93601) provide an optimal combination of dimensional stability, mechanical strength, and reliability for critical applications in extreme thermal environments. The forging process enhances the inherent low expansion characteristics of the alloy while providing superior structural integrity. These characteristics make Nilo 36 forgings particularly valuable for aerospace, semiconductor, and scientific applications where thermal dimensional stability is paramount.

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 2413 gallon liquid totes Special package is available on request.