Invar 36,Super Invar 32-5 Strip,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) Strip** **1. Overview** Invar 36 and Super Invar 32-5 are nickel-iron alloys renowned for their exceptionally low coefficient of thermal expansion (CTE). The name "Invar" derives from "invariable," reflecting its exceptional dimensional stability under thermal stress. • Invar 36 is the standard alloy offering near-zero CTE at room temperature • Super Invar 32-5 is a premium grade with cobalt addition, providing approximately three times lower CTE than standard Invar 36 Supplied in strip form, this material is ideal for precision components requiring minimal thermal movement. The Unified Numbering System (UNS) designation K93050 serves as a general classification for these low-expansion iron-nickel alloys. **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 (Typical for Annealed Strip)** | 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 | 448-586 MPa | 483-621 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) | 70-85 HRB | 75-90 HRB | **4. International Standards** | Standard Type | Invar 36 | Super Invar 32-5 | |------------------|-------------------|-------------------| | Material Standard | ASTM F1684 | ASTM F1684 | | UNS Designation | **K93600** | **K94600** | | European Standard| Ni36 (1.3912) | Ni32Co5Cu (1.3981)| | Japanese Standard| NILO 36 | - | *Note: For precise specification, use UNS K93600 for Invar 36 and UNS K94600 for Super Invar.* **5. Product Applications** Invar strip is essential for high-precision applications requiring dimensional stability: • **Electronics**: Lead frames, semiconductor packaging components, connector parts • **Precision Instruments**: Bellows, diaphragms, thermal actuators, measuring devices • **Aerospace**: Lightweight structural components, satellite elements, thermal management systems • **Telecommunications**: RF components, waveguide structures • **Consumer Electronics**: Critical components in displays and high-precision mechanisms **6. Key Advantages of Strip Form** • **Excellent Dimensional Stability**: Maintains precise tolerances across temperature variations • **Superior Surface Quality**: Ideal for precision stamping and etching processes • **High Strength-to-Weight Ratio**: Provides mechanical strength in thin gauges • **Good Formability**: Suitable for deep drawing and complex forming operations • **Consistent Thickness Control**: Maintains tight tolerances for high-volume production --- *Disclaimer: Properties may vary depending on thickness and processing conditions. Always consult manufacturer's specifications for critical applications.*

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 2437 gallon liquid totes Special package is available on request.