Magnesium AZ91A-F, Die Cast,E FOUR

Product Datasheet: Magnesium Alloy AZ91A-F (Die Cast)** #### **1. Overview** Magnesium Alloy AZ91A-F is a high-strength, lightweight magnesium-aluminum-zinc alloy supplied in the as-die-cast condition. The **"F"** temper designation indicates that the components are used in their final state without post-casting heat treatment. As one of the most widely used die-casting magnesium alloys, AZ91A-F offers an excellent combination of castability, mechanical properties, and cost-effectiveness for high-volume production. #### **2. Key Advantages** - **Excellent Die Casting Performance:** Superior fluidity and thin-wall capability for complex geometries - **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 Electromagnetic Shielding Properties:** Effective EMI/RFI shielding capability - **Cost-Effective Production:** Suitable for high-volume manufacturing #### **3. Chemical Composition (Weight % per ASTM B94)** | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Aluminum (Al)** | 8.3 - 9.7 | **Zinc (Zn)** | 0.35 - 1.0 | | **Manganese (Mn)** | 0.13 - 0.50 | **Silicon (Si)** | ≤ 0.50 | | **Copper (Cu)** | ≤ 0.10 | **Iron (Fe)** | ≤ 0.05 | | **Nickel (Ni)** | ≤ 0.03 | **Other Elements** | ≤ 0.30 | | **Magnesium (Mg)** | Balance | | | *Note: Compared to high-purity grades like AZ91D, AZ91A has higher allowable limits for impurities such as iron, copper, and nickel, which may affect corrosion resistance in certain environments.* #### **4. Physical & Mechanical Properties (Typical for Die Cast Condition)** | 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** | 230 - 280 MPa | 33 - 41 ksi | | **Tensile Yield Strength (0.2%)** | 150 - 220 MPa | 22 - 32 ksi | | **Elongation (in 50mm)** | 3 - 7 % | 3 - 7 % | | **Compressive Yield Strength** | 150 - 220 MPa | 22 - 32 ksi | | **Hardness (Brinell)** | 65 - 75 HB | 65 - 75 HB | | **Modulus of Elasticity** | 45 GPa | 6.5 × 10⁶ psi | | **Shear Strength** | 140 - 180 MPa | 20 - 26 ksi | | **Fatigue Strength** | 90 - 120 MPa | 13 - 17 ksi | #### **5. International Standards** - **ASTM International:** - **ASTM B94:** Standard Specification for Magnesium-Alloy Die Castings - **ASTM B93:** Standard Specification for Magnesium Alloys in Ingot Form - **SAE International:** - **SAE AMS 4439:** Magnesium Alloy Die Castings - **ISO Standards:** - **ISO 16220:** Magnesium and magnesium alloys - Cast products - **Unified Numbering System (UNS):** - **UNS M11914** #### **6. Die Casting Characteristics** - **Die Casting Temperature:** 620-680°C (1150-1250°F) - **Mold Temperature:** 200-300°C (390-570°F) - **Injection Speed:** 30-50 m/s - **Wall Thickness Capability:** As thin as 1.0-1.5 mm - **Shrinkage Rate:** 0.5-0.7% #### **7. Product Applications** AZ91A-F die cast components are widely used in applications requiring lightweight structural components: - **Automotive Industry:** - Steering wheel cores - Instrument panel structures - Seat frames - Transmission cases - **Electronics & Consumer Goods:** - Laptop and tablet housings - Power tool housings - Camera bodies - Mobile device components - **Industrial Equipment:** - Machinery housings - Gearbox components - Pneumatic tool bodies #### **8. Technical Considerations** - **Corrosion Protection:** Requires surface treatments (chromate conversion, painting, or powder coating) for harsh environments - **Design Considerations:** Suitable for thin-walled, complex geometries with integrated features - **Joining Methods:** Can be joined using adhesive bonding, mechanical fastening, or welding - **Surface Finish:** As-cast surface roughness typically 1.5-4.0 μm Ra #### **9. Comparison with Other Die Casting Alloys** - **vs. AZ91D:** Similar mechanical properties but AZ91D offers better corrosion resistance - **vs. AM60:** Lower ductility but higher strength - **vs. Aluminum A380:** 35% lighter weight with comparable strength --- **Disclaimer:** This information is for reference purposes only. Properties may vary based on die casting parameters, wall thickness, and part geometry. For applications requiring superior corrosion resistance, consider specifying high-purity AZ91D. Always consult with die casting experts and review certified test data 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 3317 gallon liquid totes Special package is available on request.