Invar 36,Super Invar 32-5 Fittings,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) Fittings** **1. Overview** Invar 36 and Super Invar 32-5 are nickel-iron alloys specifically engineered for applications requiring exceptional dimensional stability across temperature variations. These alloys exhibit an extremely low Coefficient of Thermal Expansion (CTE), making them ideal for precision piping systems where thermal movement must be minimized. • **Invar 36**: The standard low-expansion alloy with consistent performance across a wide temperature range • **Super Invar 32-5**: Enhanced version with cobalt addition, offering superior CTE performance near room temperature Supplied as precision fittings, these components are essential for critical piping systems in aerospace, cryogenic, and semiconductor applications. The UNS K93050 designation covers both alloys in fitting form. **2. Chemical Composition (Weight %)** | Element | Invar 36 (ASTM F1684) | Super Invar 32-5 (ASTM F1684) | |---------------|-----------------------|-------------------------------| | Nickel (Ni) | 36.0% | 32.0% | | Iron (Fe) | Balance | Balance | | Cobalt (Co) | - | 5.0% | | 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** | Property | Invar 36 | Super Invar 32-5 | |-------------------------------|--------------------|---------------------| | Coefficient of Thermal Expansion | 1.6 × 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 (2600°F) | ~1430°C (2610°F) | | Tensile Strength | 517-655 MPa | 552-690 MPa | | Yield Strength (0.2% Offset) | 276-414 MPa | 310-448 MPa | | Elongation (in 2") | 25-35% | 22-30% | | Modulus of Elasticity | 141 GPa | 141 GPa | | Hardness (Rockwell B) | 75-90 HRB | 80-95 HRB | | Pressure Rating | Schedule 40/80 | Schedule 40/80 | **4. International Standards** | Standard Type | Invar 36 | Super Invar 32-5 | |------------------------|-------------------|-------------------| | Material Standard | ASTM F1684 | ASTM F1684 | | UNS Designation | **K93600** | **K94600** | | Fitting Specifications | ASTM B366 | ASTM B366 | | European Standard | Ni36 (1.3912) | Ni32Co5Cu (1.3981)| | Dimensional Standards | ASME B16.9 | ASME B16.9 | **5. Product Applications** Invar fittings are critical components in systems requiring thermal stability: • **Cryogenic Systems**: LNG transfer lines, liquid helium/helium systems • **Aerospace**: Fuel lines, hydraulic systems, spacecraft piping • **Semiconductor Manufacturing**: Ultra-pure gas delivery systems, vacuum lines • **Scientific Instruments**: Particle accelerator components, research equipment • **Power Generation**: High-precision instrumentation lines **6. Available Fitting Types** • Elbows (45°, 90°, 180°) • Tees (Equal & Reducing) • Reducers (Concentric & Eccentric) • Caps • Crosses • Stub Ends • Custom fabricated components **7. Key Advantages** • **Zero Thermal Stress**: Maintains dimensional stability in temperature cycling environments • **Corrosion Resistance**: Suitable for various industrial fluids and gases • **High-Pressure Capability**: Maintains integrity under extreme operating conditions • **Weld Compatibility**: Can be welded to matching pipe using Invar 36/32-5 filler metals • **Long Service Life**: Exceptional fatigue resistance in thermal cycling applications --- *Note: All fittings are supplied in solution annealed condition. Machined surfaces meet ASTM A967 passivation standards. Consult engineering department for custom fitting requirements and pressure-temperature ratings.*

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 2438 gallon liquid totes Special package is available on request.