Invar 36,Super Invar 32-5 Forgings,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) Forgings** **1. Overview** Invar 36 and Super Invar 32-5 are premium nickel-iron alloys specifically engineered for applications demanding exceptional dimensional stability under thermal cycling conditions. The forging process enhances these alloys' mechanical properties, making them ideal for critical structural components in extreme environments. • **Invar 36**: The industry-standard low-expansion alloy with proven performance across -250°C to +200°C • **Super Invar 32-5**: Advanced formulation with cobalt addition, delivering ultra-low CTE characteristics superior to standard Invar 36 Supplied as precision forgings, these materials provide optimal grain structure and enhanced mechanical properties for the most demanding aerospace, defense, and scientific applications. **2. Chemical Composition (Weight %)** | Element | Invar 36 (ASTM F1684) | Super Invar 32-5 (ASTM F1684) | |---------------|-----------------------|-------------------------------| | Nickel (Ni) | 35.0-37.0% | 31.5-32.5% | | Iron (Fe) | Balance | Balance | | Cobalt (Co) | ≤ 0.5% | 4.8-5.4% | | Carbon (C) | ≤ 0.05% | ≤ 0.05% | | Manganese (Mn)| ≤ 0.35% | ≤ 0.35% | | Silicon (Si) | ≤ 0.25% | ≤ 0.25% | | Chromium (Cr) | ≤ 0.20% | ≤ 0.20% | | Sulfur (S) | ≤ 0.02% | ≤ 0.02% | | Phosphorus (P)| ≤ 0.02% | ≤ 0.02% | **3. Physical & Mechanical Properties (Forged Condition)** | Property | Invar 36 | Super Invar 32-5 | |-------------------------------|--------------------|---------------------| | Coefficient of Thermal Expansion | 1.3 × 10⁻⁶/°C | 0.6 × 10⁻⁶/°C | | (20°C to 100°C) | | | | Density | 8.11 g/cm³ | 8.13 g/cm³ | | Melting Point | 1427°C | 1430°C | | Tensile Strength | 550-690 MPa | 580-720 MPa | | Yield Strength (0.2% Offset) | 280-450 MPa | 320-480 MPa | | Elongation (in 4D) | 25-35% | 20-30% | | Reduction of Area | 45-60% | 40-55% | | Modulus of Elasticity | 141 GPa | 141 GPa | | Impact Strength (Charpy V) | 70-100 J | 60-90 J | **4. International Standards & Certifications** | Standard Type | Invar 36 | Super Invar 32-5 | |------------------------|-------------------|-------------------| | Material Standard | ASTM F1684 | ASTM F1684 | | UNS Designation | **K93600** | **K94600** | | Forging Standard | ASTM B788 | ASTM B788 | | European Standard | EN 1.3912 | EN 1.3981 | | Aerospace Standards | AMS 7721 | AMS 7722 | | Quality Certification | EN 10204 3.1/3.2 | EN 10204 3.1/3.2 | **5. Product Applications** Invar forgings serve critical functions in high-precision industries: • **Aerospace**: Satellite structural frames, optical mounting brackets, rocket engine components • **Defense**: Guidance system housings, radar antenna structures, military optical systems • **Scientific Research**: Particle accelerator components, telescope mounts, cryogenic instrument frames • **Semiconductor**: EUV lithography stages, wafer handling robotics, precision measurement equipment • **Energy**: LNG pump components, cryogenic valve bodies, nuclear instrumentation **6. Forging Capabilities** • **Open Die Forgings**: 5 kg to 2000 kg capacity • **Closed Die Forgings**: Complex geometries with minimal machining allowance • **Ring Rolled Forgings**: Diameters up to 4000 mm • **Heat Treatment**: Full solution annealing and stress relieving • **NDT Testing**: UT, RT, MT, PT per required specifications **7. Technical Advantages** • **Superior Grain Flow**: Optimized mechanical properties through controlled forging process • **Enhanced Fatigue Strength**: Ideal for cyclic loading applications • **Homogeneous Microstructure**: Consistent properties throughout the component • **Minimal Inclusion Content**: High purity material with strict control of non-metallic inclusions • **Excellent Machinability**: Can be precision machined to tight tolerances after forging --- *Note: All forgings are supplied with complete traceability and certified material test reports. Special heat treatments and testing protocols available for nuclear and aerospace applications. Lead times vary based on component complexity and quantity.*

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 2439 gallon liquid totes Special package is available on request.