Invar 36,Super Invar 32-5 Forgings,UNS K93603,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

**Super Invar 32-5 Forgings (UNS K93603) - Technical Product Introduction** --- ### **Overview** **Super Invar 32-5 Forgings** (UNS K93603) represent the forged product form of the advanced iron-nickel-cobalt alloy, offering the lowest coefficient of thermal expansion among commercially available metal alloys. The forging process enhances the material's mechanical properties while maintaining its exceptional dimensional stability, making it ideal for critical components in ultra-precision applications. --- ### **1. Chemical Composition (%)** | Element | Content | |---------|---------| | **Nickel (Ni)** | 31.5-33.0 | | **Cobalt (Co)** | 4.5-5.5 | | **Iron (Fe)** | Balance | | **Carbon (C)** | ≤0.05 | | **Manganese (Mn)** | ≤0.50 | | **Silicon (Si)** | ≤0.20 | | **Phosphorus (P)** | ≤0.015 | | **Sulfur (S)** | ≤0.015 | | **Chromium (Cr)** | ≤0.15 | | **Aluminum (Al)** | ≤0.10 | --- ### **2. Physical Properties** | Property | Value | |----------|-------| | **Density** | 8.10 g/cm³ | | **Melting Point** | 1430°C | | **Coefficient of Thermal Expansion** | **0.5-0.8 × 10⁻⁶/°C** (20-100°C) | | **Thermal Conductivity** | 10.0 W/m·K | | **Specific Heat Capacity** | 500 J/kg·K | | **Modulus of Elasticity** | 147 GPa | | **Electrical Resistivity** | 0.80 μΩ·m | | **Curie Temperature** | 250°C | --- ### **3. Mechanical Properties** | Property | Value | |----------|-------| | **Tensile Strength** | 500-580 MPa | | **Yield Strength (0.2% Offset)** | 300-380 MPa | | **Elongation** | 20-30% | | **Reduction of Area** | 45-55% | | **Hardness** | 80-95 HRB | | **Impact Strength** | 90-110 J | --- ### **4. Manufacturing Specifications** **Forging Process:** - **Open-Die Forgings:** For large, simple shapes - **Closed-Die Forgings:** For complex, precision components - **Ring Rolled Forgings:** For circular components - **Precision Forgings:** Near-net shape capabilities **Available Forms:** - **Block Forgings:** Up to 5000 kg - **Shaft Forgings:** Maximum length 4000 mm - **Ring Forgings:** Up to 2000 mm diameter - **Custom Shapes:** Per customer specifications --- ### **5. Product Applications** **Aerospace & Defense:** - **Satellite Mirror Mounts:** Ultra-stable optical supports - **Space Telescope Structures:** Primary mirror cells and mounts - **Inertial Guidance Systems:** Stable platform components - **Radar System Bases:** Precision mounting structures **Semiconductor Manufacturing:** - **Extreme Ultraviolet Lithography:** EUV optical mounts - **Wafer Stage Components:** Precision positioning elements - **Vacuum Chamber Components:** Structural support members - **Metrology Equipment:** Base frames and reference structures **Scientific Research:** - **Particle Accelerators:** Magnet cores and support structures - **Gravitational Wave Detectors:** Ultra-stable optical mounts - **Synchrotron Radiation:** Beam line components - **Fundamental Physics:** Precision experimental apparatus **Precision Engineering:** - **Laser System Bases:** Stable optical platforms - **Coordinate Measuring Machines:** Reference structures - **Optical Instrumentation:** Precision mounting components - **Standard Reference:** Primary length standards --- ### **6. International Standards** | Standard Body | Standard Number | Description | |---------------|-----------------|-------------| | **ASTM** | ASTM F1684-06 | Standard Specification for Forgings | | **UNS** | K93603 | Unified Numbering System | | **AMS** | AMS 7726 | Aerospace Material Specification | | **ASME** | SA-658 | Boiler and Pressure Vessel Code | | **JIS** | JIS NCF 3 | Japanese Industrial Standard | --- ### **7. Special Processing Requirements** **Forging Process Control:** - **Forging Temperature:** 1150-950°C - **Reduction Ratio:** Minimum 3:1 required - **Grain Flow Optimization:** Directional property enhancement - **Post-Forging Heat Treatment:** Critical for property development **Heat Treatment Protocol:** - **Solution Treatment:** 830-850°C, controlled atmosphere - **Rapid Quenching:** Essential for optimal properties - **Stabilization:** 315-370°C for 2-4 hours per inch - **Stress Relieving:** 425-480°C after machining --- ### **8. Quality Assurance** **Mandatory Testing:** - **Ultrasonic Testing:** Per ASTM A388 - **CTE Verification:** Dilatometer testing per ASTM E228 - **Mechanical Testing:** Full suite of mechanical tests - **Metallographic Examination:** Grain structure evaluation **Certification Requirements:** - **Full Traceability:** From melt to finished forging - **Forging Process Records:** Complete manufacturing history - **Heat Treatment Documentation:** Comprehensive thermal records - **CTE Certification:** Batch-specific performance data --- ### **9. Design & Application Guidelines** **Thermal Considerations:** - Optimal CTE performance around room temperature - Requires thermal stabilization for critical applications - Sensitive to thermal gradients during processing - Excellent long-term dimensional stability **Mechanical Advantages:** - Enhanced grain structure from forging process - Superior directional properties - Improved fatigue resistance - Better internal soundness **Application Limitations:** - Maximum service temperature: 200°C - Requires corrosion protection - Higher cost than conventional forgings - Specialized machining requirements --- ### **Conclusion** Super Invar 32-5 Forgings (UNS K93603) represent the pinnacle of dimensional stability in forged components, offering unparalleled thermal performance for the most demanding precision applications. The forging process enhances the material's inherent low expansion characteristics while providing superior mechanical properties and structural integrity. These characteristics make Super Invar forgings particularly valuable for aerospace, semiconductor, and scientific applications where thermal dimensional stability is paramount. While requiring specialized processing and strict quality controls, the material's exceptional performance justifies its use in applications where conventional materials cannot meet the stringent thermal stability requirements. Proper design, manufacturing controls, and comprehensive quality assurance are essential to realize the full benefits of this exceptional material in critical forged components.

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 2426 gallon liquid totes Special package is available on request.