Invar 36,Super Invar 32-5 Plate,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 Plate (UNS K93603) - Technical Product Introduction** --- ### **Overview** **Super Invar 32-5 Plate** (UNS K93603) represents the plate form of the advanced iron-nickel-cobalt alloy renowned for its exceptionally low coefficient of thermal expansion. This product offers the ultimate in dimensional stability for flat stock applications, with a thermal expansion coefficient approximately one-third that of standard Invar 36, making it ideal for ultra-precision applications in aerospace, metrology, and semiconductor manufacturing. --- ### **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 (Annealed Condition)** | Property | Value | |----------|-------| | **Tensile Strength** | 480-550 MPa | | **Yield Strength (0.2% Offset)** | 280-350 MPa | | **Elongation** | 25-35% | | **Reduction of Area** | 50-60% | | **Hardness** | 75-85 HRB | | **Shear Modulus** | 56 GPa | --- ### **4. Product Specifications** **Plate Dimensions:** - **Thickness Range:** 6 mm to 150 mm - **Width Range:** 500 mm to 2000 mm - **Length Range:** 1000 mm to 4000 mm - **Custom Sizes:** Available upon request **Tolerance Standards:** - **Thickness Tolerance:** ±0.1 mm to ±0.5 mm (depending on thickness) - **Flatness:** 1.0 mm per meter maximum - **Surface Finish:** Standard 2B, polished finishes available --- ### **5. Product Applications** **Ultra-Precision Instrumentation:** - **Optical Reference Plates:** Primary flatness standards - **Laser System Bases:** Stable optical mounting platforms - **Interferometer Components:** Reference surfaces and bases - **Metrology Equipment:** Coordinate measuring machine tables **Aerospace & Defense:** - **Satellite Optical Benches:** Stable platforms for imaging systems - **Space Telescope Structures:** Primary mirror mounts and bases - **Guidance System Mounts:** Inertial platform components - **Radar System Bases:** Stable mounting surfaces **Semiconductor Manufacturing:** - **Lithography Equipment:** Reticle stages and wafer chucks - **EUVL System Components:** Extreme ultraviolet lithography bases - **Wafer Inspection Systems:** Precision reference surfaces - **Clean Room Equipment:** Vibration-stable work surfaces **Scientific Research:** - **Gravitational Wave Detectors:** Stable optical component mounts - **Synchrotron Equipment:** Beam line optical tables - **Fundamental Physics:** Precision experimental platforms - **Laboratory Standards:** Primary reference surfaces --- ### **6. International Standards** | Standard Body | Standard Number | Description | |---------------|-----------------|-------------| | **ASTM** | ASTM F1684-06 | Standard Specification for Plate | | **UNS** | K93603 | Unified Numbering System | | **AMS** | AMS 7726 | Aerospace Material Specification | | **JIS** | JIS NCF 3 | Japanese Industrial Standard | | **GB** | GB 4J32 | Chinese National Standard | --- ### **7. Special Processing Requirements** **Heat Treatment Protocol:** - **Solution Treatment:** 830-850°C in controlled atmosphere - **Quenching:** Rapid cooling to room temperature - **Stabilization:** 315-370°C for 2-4 hours per inch of thickness - **Stress Relieving:** 425-480°C after machining operations **Machining Guidelines:** - **Cutting Tools:** Carbide tools with positive rake angles - **Cutting Speed:** 15-25 m/min for optimal results - **Feed Rate:** 0.1-0.3 mm/rev - **Coolant Requirements:** Essential for temperature control --- ### **8. Quality Assurance** **Mandatory Testing:** - **CTE Verification:** Dilatometer testing per ASTM E228 - **Ultrasonic Testing:** 100% examination per ASTM A578 - **Flatness Verification:** Laser interferometry or precision levels - **Surface Quality:** Visual and microscopic examination **Certification Requirements:** - **Full Traceability:** From melt to finished plate - **Heat Treatment Records:** Complete thermal history - **CTE Test Reports:** Batch-specific performance data - **Third-Party Verification:** For critical applications --- ### **9. Design & Application Guidelines** **Thermal Considerations:** - Optimal performance in 15-35°C temperature range - Requires thermal stabilization for critical applications - Sensitive to thermal gradients during operation - Excellent long-term dimensional stability **Mechanical Design:** - Higher stiffness-to-weight ratio than standard Invar - Excellent vibration damping characteristics - Good fatigue resistance for dynamic applications - Suitable for high-vacuum and clean room environments **Application Limitations:** - Maximum service temperature: 200°C - Requires corrosion protection in harsh environments - Magnetic properties similar to standard nickel-iron alloys - Higher cost justifies use in critical applications only --- ### **Conclusion** Super Invar 32-5 Plate (UNS K93603) offers unparalleled thermal stability in plate form, making it the material of choice for applications where dimensional stability at the sub-micron level is critical. Its exceptionally low coefficient of thermal expansion, approximately three times lower than standard Invar 36, combined with excellent mechanical properties and manufacturing capabilities, makes it indispensable for the most demanding applications in aerospace, semiconductor manufacturing, and scientific research. While requiring specialized processing and strict quality controls, the material's superior performance justifies its use in applications where thermal stability is paramount. Proper handling, machining, and heat treatment procedures are essential to maintain the material's exceptional properties in finished 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 2422 gallon liquid totes Special package is available on request.