Invar 36,Super Invar 32-5 Other/Similar Specs,UNS K93050,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

**Product Datasheet: Invar 36 & Super Invar 32-5 (UNS K93050) - Other Forms & Similar Specifications** **1. Overview** Invar 36 and Super Invar 32-5 represent a specialized class of nickel-iron alloys celebrated for their exceptionally low coefficient of thermal expansion (CTE). While commonly available in standard forms, these materials are also produced in various specialized configurations to meet specific engineering requirements. This datasheet covers alternative forms, specialized specifications, and equivalent materials that maintain the characteristic "Invar Effect" of dimensional stability under thermal stress. **2. Chemical Composition (Weight %)** | Element | Invar 36 (Standard) | Super Invar 32-5 (Standard) | Modified Grades | |---------------|---------------------|-----------------------------|-----------------| | Nickel (Ni) | 35.0-37.0% | 31.5-32.5% | 35.0-37.0% | | Iron (Fe) | Balance | Balance | Balance | | Cobalt (Co) | ≤ 0.5% | 4.8-5.4% | 0.5-5.0% | | Carbon (C) | ≤ 0.05% | ≤ 0.05% | ≤ 0.03% | | Manganese (Mn)| ≤ 0.35% | ≤ 0.35% | ≤ 0.50% | | Silicon (Si) | ≤ 0.25% | ≤ 0.25% | ≤ 0.20% | | Chromium (Cr) | ≤ 0.20% | ≤ 0.20% | ≤ 0.25% | | Copper (Cu) | - | ≤ 0.50% | ≤ 0.50% | | Aluminum (Al) | - | - | ≤ 0.10% | **3. Physical & Mechanical Properties** | Property | Invar 36 (Standard) | Super Invar 32-5 (Standard) | Modified Grades | |-------------------------------|---------------------|-----------------------------|-----------------| | CTE (20-100°C) | 1.6 × 10⁻⁶/°C | 0.6 × 10⁻⁶/°C | 0.8-1.8 × 10⁻⁶/°C | | Density (g/cm³) | 8.11 | 8.13 | 8.10-8.15 | | Melting Point (°C) | 1427 | 1430 | 1420-1440 | | Tensile Strength (MPa) | 448-586 | 483-621 | 450-650 | | Yield Strength (MPa) | 276-414 | 310-448 | 280-450 | | Elongation (%) | 25-35 | 22-30 | 20-35 | | Modulus of Elasticity (GPa) | 141 | 141 | 138-145 | | Thermal Conductivity (W/m·K) | 10.5 | 10.5 | 10-12 | | Specific Heat (J/kg·K) | 515 | 515 | 500-520 | **4. International Standards & Equivalents** | Region/Standard | Invar 36 Equivalent | Super Invar 32-5 Equivalent | |-------------------|---------------------|----------------------------| | ASTM | F1684 (K93600) | F1684 (K94600) | | UNS | K93600 | K94600 | | EN/ISO | 1.3912 (X1NiCrMoCu) | 1.3981 (X1NiCoMo) | | JIS | NILO 36 | NILO 32-5 | | GB (China) | 4J36 | 4J32 | | DIN | Ni36 | Ni32Co5 | **5. Specialized Forms & Configurations** **5.1 Wire & Rod Products** - Diameter range: 0.1 mm to 50 mm - Surface finish: Bright, etched, or coated - Applications: Precision springs, measuring wires, welding wire **5.2 Custom Castings** - Investment castings for complex geometries - Sand castings for large components - Vacuum cast versions for high-purity requirements **5.3 Powder Metallurgy Products** - Metal Injection Molding (MIM) feedstock - Hot Isostatic Pressing (HIP) components - Additive manufacturing powders **5.4 Clad & Bimetallic Materials** - Invar-stainless steel composites - Copper-clad Invar for electronic applications - Aluminum-Invar laminates **6. Special Applications & Configurations** **6.1 Composite Tooling** - Large mold bases for aerospace composites - Lay-up tools with integrated heating systems - Matched-die molds for high-temperature curing **6.2 Optical Mounting Systems** - Precision mirror mounts and brackets - Telescope structural components - Laser system frames and bases **6.3 Cryogenic Apparatus** - LNG measurement equipment - Superconducting magnet supports - Cryostat internal structures **6.4 Semiconductor Manufacturing** - EUV lithography chambers - Wafer stage components - Vacuum chamber fixtures **7. Modified & Enhanced Grades** **7.1 High-Strength Variants** - Precipitation-hardenable grades - Cold-worked versions for increased strength - Micro-alloyed compositions **7.2 Enhanced Machinability Grades** - Sulfur-modified versions for improved machining - Lead-free machinable variants - Calcium-treated grades **7.3 Special Surface Condition** - Polished surfaces for ultra-high vacuum - Passivated surfaces for corrosive environments - Coated versions for specific applications **8. Quality Assurance & Certification** - Material Test Certificate 3.1/3.2 per EN 10204 - Ultrasonic testing per ASTM A388 - Liquid penetrant testing per ASTM E165 - Magnetic particle testing per ASTM E709 - Special cleanroom packaging available **9. Technical Notes** - All Invar alloys are magnetic at room temperature - CTE minimum typically occurs near room temperature - Properties can be tailored through heat treatment - Special processing available for specific CTE requirements - Long-term aging characteristics should be considered for critical applications This comprehensive overview demonstrates the versatility of Invar alloys beyond standard forms, highlighting their adaptability to specialized applications and custom requirements across multiple 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 2440 gallon liquid totes Special package is available on request.