Invar 36,Super Invar 32-5 Strip,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 Strip (UNS K93603) - Technical Product Introduction** --- ### **Overview** **Super Invar 32-5 Strip** (UNS K93603) represents the precision strip form of the advanced iron-nickel-cobalt alloy, offering the lowest coefficient of thermal expansion among commercially available metal alloys in thin-strip configuration. This product is specifically engineered for high-volume precision components requiring exceptional dimensional stability under thermal variations, making it ideal for advanced electronics, instrumentation, and aerospace 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** | Condition | Tensile Strength | Yield Strength | Elongation | |-----------|------------------|----------------|------------| | **Annealed** | 470-540 MPa | 270-340 MPa | 25-35% | | **¼ Hard** | 550-620 MPa | 480-550 MPa | 15-25% | | **½ Hard** | 620-690 MPa | 550-620 MPa | 8-15% | --- ### **4. Product Specifications** **Thickness Range:** - **Ultra-Thin Strip:** 0.05 mm to 0.50 mm - **Standard Strip:** 0.50 mm to 2.0 mm - **Tolerance:** ±0.005 mm to ±0.02 mm **Width Range:** - **Narrow Strip:** 2 mm to 100 mm - **Wide Strip:** Up to 300 mm - **Slit Edge:** Burr-free, precision slit **Temper Conditions:** - **Annealed (Soft):** Maximum formability - **¼ Hard:** Balanced strength and formability - **½ Hard:** Higher strength applications --- ### **5. Product Applications** **Advanced Electronics:** - **High-Frequency Lead Frames:** For advanced semiconductor packages - **Microwave Circuit Substrates:** Stable platforms for RF components - **MEMS Packaging:** Precision packaging components - **Quantum Computing Components:** Stable mounting elements **Aerospace & Defense:** - **Satellite Electronics:** Precision electronic packaging - **Avionics Components:** Stable circuit mounts and shields - **Guidance System Parts:** Precision structural elements - **Thermal Management:** Heat spreader applications **Precision Instrumentation:** - **Sensor Components:** Stable sensing elements - **Optical Mounting Systems:** Precision alignment strips - **Measurement Standards:** Reference strip materials - **Laboratory Equipment:** Precision mechanical components **Medical Devices:** - **Surgical Instruments:** Precision components - **Medical Imaging Systems:** Stable structural elements - **Diagnostic Equipment:** Precision mechanical parts - **Implantable Devices:** Critical components --- ### **6. International Standards** | Standard Body | Standard Number | Description | |---------------|-----------------|-------------| | **ASTM** | ASTM F1684-06 | Standard Specification for Strip | | **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. Fabrication Characteristics** **Stamping & Blanking:** - **Clearance:** 5-8% of material thickness - **Tool Life:** Excellent with proper maintenance - **Burr Formation:** Minimal with sharp tools - **Springback:** Predictable and consistent **Surface Treatments:** - **Electroplating:** Excellent for gold, nickel, tin plating - **Passivation:** Improved corrosion resistance - **Chemical Etching:** Precision patterning capability - **Thermal Spraying:** Compatible with various coatings **Quality Requirements:** - **Surface Quality:** Free from scratches and imperfections - **Flatness:** Strict flatness tolerances maintained - **Edge Condition:** Clean, burr-free edges - **Dimensional Stability:** Consistent through coil length --- ### **8. Quality Assurance** **Testing & Certification:** - **CTE Verification:** Dilatometer testing per ASTM E228 - **Dimensional Control:** Continuous monitoring during production - **Surface Inspection:** 100% visual inspection - **Mechanical Testing:** Regular tensile and hardness tests **Certification Requirements:** - **Material Certificate:** 3.1 Mill Certificate - **Traceability:** Full heat and coil traceability - **CTE Certification:** Actual test data for each lot - **RoHS/REACH Compliance:** Environmental compliance --- ### **9. Design Considerations** **Thermal Performance:** - CTE approximately 3× lower than standard Invar 36 - Optimal performance around room temperature - Requires thermal conditioning for critical applications - Excellent stability under thermal cycling **Electrical Properties:** - Consistent electrical resistivity - Good solderability and bondability - Stable performance in varying temperatures - Suitable for high-frequency applications **Processing Guidelines:** - **Storage:** Proper conditions to prevent deformation - **Handling:** Care required to prevent surface damage - **Cleaning:** Suitable for standard cleaning methods - **Annealing:** Required after severe forming operations --- ### **Conclusion** Super Invar 32-5 Strip (UNS K93603) offers unparalleled thermal stability in strip form, providing manufacturers with a premium material solution for the most demanding precision applications. Its exceptionally low coefficient of thermal expansion, combined with excellent fabrication characteristics and consistent quality, makes it indispensable for advanced electronics, aerospace components, and precision instrumentation where dimensional stability is critical. The material's superior performance, though requiring careful processing and quality control, justifies its use in applications where conventional materials cannot meet the stringent thermal stability requirements. Proper selection of thickness, temper condition, and adherence to recommended fabrication practices are essential for achieving optimal performance in high-volume precision 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 2424 gallon liquid totes Special package is available on request.