Magnesium AZ91E-F, Cast,E FOUR

Product Datasheet: Magnesium Alloy AZ91E-F (Cast), UNS M11914** **1. Overview** Magnesium Alloy AZ91E-F is a high-purity, corrosion-resistant magnesium-aluminum-zinc alloy supplied in the as-cast condition. The **"F"** temper designation indicates that castings are used without post-casting heat treatment. The **"E"** suffix designates the high-purity version with strict control over iron, copper, and nickel impurities, resulting in significantly improved corrosion resistance compared to standard AZ91 alloys. This alloy combines excellent castability with superior environmental resistance, making it the preferred choice for sand and permanent mold castings where corrosion performance is critical. **2. Key Advantages** * **Superior Corrosion Resistance:** Excellent resistance to atmospheric and saltwater corrosion due to low impurity content * **Excellent Castability:** Superior fluidity for producing complex, thin-walled castings with fine detail * **High Strength-to-Weight Ratio:** Approximately 35% lighter than aluminum with good mechanical properties * **Good Machinability:** Can be machined at high speeds with excellent surface finish * **Good Damping Capacity:** Effectively absorbs vibrational energy and reduces noise **3. Chemical Composition (Weight % per ASTM B80)** | Element | Content (%) | Element | Content (%) | | :--- | :--- | :--- | :--- | | **Aluminum (Al)** | 8.3 - 9.2 | **Zinc (Zn)** | 0.45 - 0.9 | | **Manganese (Mn)** | 0.17 - 0.50 | **Silicon (Si)** | ≤ 0.20 | | **Copper (Cu)** | ≤ 0.015 | **Iron (Fe)** | ≤ 0.004 | | **Nickel (Ni)** | ≤ 0.001 | **Other Impurities** | ≤ 0.30 | | **Magnesium (Mg)** | Balance | | | *Note: The extremely low limits for iron, copper, and nickel (Fe+Cu+Ni ≤ 0.02%) are critical for achieving the alloy's superior corrosion resistance properties.* **4. Physical & Mechanical Properties (Typical for Sand Cast F Temper)** | Property | Metric Unit | Imperial Unit | | :--- | :--- | :--- | | **Density** | 1.81 g/cm³ | 0.065 lb/in³ | | **Melting Range** | 470 - 595 °C | 878 - 1103 °F | | **Ultimate Tensile Strength** | 150 - 165 MPa | 22 - 24 ksi | | **Tensile Yield Strength (0.2%)** | 95 - 110 MPa | 14 - 16 ksi | | **Elongation (in 50mm)** | 1 - 3 % | 1 - 3 % | | **Compressive Yield Strength** | 95 - 110 MPa | 14 - 16 ksi | | **Hardness (Brinell)** | 60 - 65 HB | 60 - 65 HB | | **Modulus of Elasticity** | 45 GPa | 6.5 × 10⁶ psi | | **Shear Strength** | 110 - 125 MPa | 16 - 18 ksi | | **Fatigue Strength** | 70 - 85 MPa | 10 - 12 ksi | **5. International Standards** * **ASTM International:** * **ASTM B80:** Standard Specification for Magnesium-Alloy Sand Castings * **ASTM B93/B93M:** Standard Specification for Magnesium Alloys in Ingot Form for Sand Castings, Permanent Mold Castings, and Die Castings * **SAE International:** * **SAE AMS 4435:** Magnesium Alloy Sand Castings 9Al-0.7Zn (AZ91) * **Unified Numbering System (UNS):** * **UNS M11914** * **ISO Standards:** * **ISO 16220:** Magnesium and magnesium alloys - Cast products * **Military Standards:** * **MIL-M-46062:** Magnesium Alloy, Castings, High Strength **6. Product Applications** AZ91E-F is widely used in applications requiring lightweight components with good corrosion resistance: * **Aerospace & Defense:** * Aircraft transmission housings * Gearbox components * Radar and electronic equipment housings * * * **7. Technical Considerations** * **As-Cast Characteristics:** Contains Mg₁₇Al₁₂ precipitates in grain boundaries * **Corrosion Performance:** Salt spray resistance typically exceeds 96 hours to initial red rust * **Heat Treatment Capability:** Can be subsequently heat treated to T4 or T6 tempers if required * **Surface Protection:** Still benefits from protective coatings in aggressive environments * **Weldability:** Generally not recommended due to microstructural changes **8. Comparison with Other AZ91 Variants** * **vs. AZ91C-F:** Superior corrosion resistance due to lower impurity content * **vs. AZ91D (Die Cast):** Similar corrosion resistance but different casting characteristics * **vs. Heat-Treated Tempers:** Lower strength but more cost-effective for non-structural applications **9. Manufacturing Notes** * **Casting Methods:** Excellent for sand casting and permanent mold casting * **Melt Handling:** Requires careful control to maintain high purity levels * **Quality Control:** Recommended practices include radiographic inspection for critical areas * **Finishing:** Responds well to all standard magnesium finishing processes --- **Disclaimer:** This information is for reference purposes only. Properties may vary based on casting method, section size, and foundry practices. For applications requiring higher mechanical properties, consider specifying AZ91E in T4 or T6 temper. Always consult certified test data and applicable material 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 3314 gallon liquid totes Special package is available on request.