Magnesium AZ91D-F, Cast,E FOUR

Product Datasheet: Magnesium Alloy AZ91D-F (Cast), UNS M11914** #### **1. Overview** Magnesium Alloy AZ91D-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, while the **"D"** suffix designates the high-purity version with stringent control over iron, copper, and nickel impurities. This alloy represents the industry standard for applications requiring excellent corrosion resistance combined with good mechanical properties. #### **2. Key Advantages** - **Superior Corrosion Resistance:** Excellent resistance to saltwater and atmospheric corrosion - **Excellent Castability:** Superior fluidity for producing complex, thin-walled castings - **High Strength-to-Weight Ratio:** Approximately 35% lighter than aluminum - **Good Machinability:** Can be machined at high speeds with excellent surface finish - **Good Electromagnetic Shielding:** Effective EMI/RFI shielding properties #### **3. Chemical Composition (Weight % per ASTM B94)** | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Aluminum (Al)** | 8.5 - 9.5 | **Zinc (Zn)** | 0.45 - 0.9 | | **Manganese (Mn)** | 0.17 - 0.40 | **Silicon (Si)** | ≤ 0.05 | | **Copper (Cu)** | ≤ 0.025 | **Iron (Fe)** | ≤ 0.004 | | **Nickel (Ni)** | ≤ 0.001 | **Other Elements** | ≤ 0.01 | | **Magnesium (Mg)** | Balance | | | *Note: The extremely low limits for iron (≤0.004%), copper (≤0.025%), and nickel (≤0.001%) are critical for achieving superior corrosion resistance, with total impurity content (Fe+Cu+Ni) typically maintained below 0.02%.* #### **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%)** | 160 - 220 MPa | 23 - 32 ksi | | **Elongation (in 50mm)** | 3 - 7 % | 3 - 7 % | | **Compressive Yield Strength** | 160 - 220 MPa | 23 - 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 - **European Standards:** - **EN 1753:** Magnesium and magnesium alloys - **Unified Numbering System (UNS):** - **UNS M11914** #### **6. Casting Characteristics** - **Casting Temperature:** 620-680°C (1150-1250°F) - **Fluidity:** Excellent for thin-walled sections (1.0-2.0 mm) - **Shrinkage:** 0.5-0.7% - **Hot Cracking Resistance:** Good - **Die Soldering Resistance:** Excellent with proper die lubrication #### **7. Product Applications** AZ91D-F is widely used in applications requiring lightweight components with excellent corrosion resistance: - **Automotive Industry:** - Transmission cases - Steering column components - Instrument panel structures - Engine brackets - **Electronics & Telecommunications:** - Laptop and tablet housings - Mobile phone components - Camera bodies - Power tool housings - **Aerospace & Defense:** - Avionics enclosures - Radar components - Military communication equipment - **Consumer Products:** - Sporting goods - Portable medical devices - Handheld scanners #### **8. Technical Considerations** - **Corrosion Performance:** Salt spray resistance typically exceeds 96 hours to initial red rust - **Surface Treatments:** Responds well to conversion coatings, anodizing, painting, and plating - **Joining Methods:** Adhesive bonding, mechanical fastening, or welding with proper techniques - **Service Temperature:** Maximum continuous service temperature 120°C (250°F) - **Dimensional Stability:** Good for most applications #### **9. Quality & Inspection** - **Non-Destructive Testing:** Suitable for radiographic, penetrant, and ultrasonic inspection - **Quality Assurance:** Meets automotive and aerospace quality standards - **Certification:** Available with full material traceability and certification --- **Disclaimer:** This information is provided for reference purposes only. Properties may vary based on casting method, wall thickness, and specific production parameters. For critical applications, always consult certified test data and applicable material specifications. Proper design, manufacturing controls, and surface protection are essential for achieving optimal performance in corrosive environments.

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 3319 gallon liquid totes Special package is available on request.