Magnesium AZ91B-F, Die Cast,E FOUR

Product Datasheet: Magnesium Alloy AZ91B-F (Die Cast)** #### **1. Overview** Magnesium Alloy AZ91B-F is a standard magnesium-aluminum-zinc die casting alloy supplied in the as-cast condition. The **"F"** temper designation indicates that components are used without post-casting heat treatment. AZ91B represents an intermediate purity grade between AZ91A and the high-purity AZ91D, offering a balanced combination of mechanical properties, castability, and cost-effectiveness for general purpose applications. #### **2. Key Advantages** - **Excellent Die Casting Characteristics:** Superior fluidity for thin-walled complex components - **Good Mechanical Properties:** High strength-to-weight ratio with adequate ductility - **Cost-Effective Production:** Lower material cost compared to high-purity grades - **Good Machinability:** Excellent machining characteristics with high surface quality - **Good Damping Capacity:** Effective vibration absorption #### **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)** | 0.13 - 0.40 | **Silicon (Si)** | ≤ 0.30 | | **Copper (Cu)** | ≤ 0.08 | **Iron (Fe)** | ≤ 0.03 | | **Nickel (Ni)** | ≤ 0.01 | **Other Elements** | ≤ 0.30 | | **Magnesium (Mg)** | Balance | | | *Note: AZ91B has intermediate purity levels with tighter control on iron and nickel compared to AZ91A, but less strict than AZ91D specifications.* #### **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 - 270 MPa | 33 - 39 ksi | | **Tensile Yield Strength (0.2%)** | 160 - 200 MPa | 23 - 29 ksi | | **Elongation (in 50mm)** | 3 - 6 % | 3 - 6 % | | **Compressive Yield Strength** | 160 - 200 MPa | 23 - 29 ksi | | **Hardness (Brinell)** | 65 - 75 HB | 65 - 75 HB | | **Modulus of Elasticity** | 45 GPa | 6.5 × 10⁶ psi | | **Shear Strength** | 140 - 170 MPa | 20 - 25 ksi | | **Fatigue Strength** | 90 - 115 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 - **Japanese Standards:** - **JIS H 2221:** Magnesium alloy die castings - **Unified Numbering System (UNS):** - **UNS M11914** #### **6. Die Casting Parameters** - **Molten Metal Temperature:** 640-680°C (1185-1255°F) - **Die Temperature:** 200-300°C (390-570°F) - **Injection Pressure:** 400-800 bar - **Filling Speed:** 30-60 m/s - **Minimum Wall Thickness:** 1.2-1.8 mm #### **7. Product Applications** AZ91B-F die castings are suitable for various industrial and consumer applications: - **Automotive Components:** - Bracket assemblies - Cover plates - Housing components - Interior trim parts - **Industrial Equipment:** - Machinery housings - Power tool components - Pneumatic equipment parts - Material handling components - **Consumer Products:** - Appliance components - Electronic enclosures - Garden equipment parts - Sporting goods components #### **8. Technical Considerations** - **Corrosion Protection:** Requires surface treatments for applications in corrosive environments - **Design Flexibility:** Suitable for complex geometries with integrated ribs and bosses - **Joining Methods:** Adhesive bonding, mechanical fastening, or welding - **Surface Quality:** As-cast surface finish typically 1.6-3.2 μm Ra #### **9. Comparison with Other Grades** - **vs. AZ91A:** Better corrosion resistance due to tighter impurity control - **vs. AZ91D:** Lower cost but reduced corrosion performance - **vs. AM50A:** Higher strength but lower ductility --- **Disclaimer:** This information is provided for reference purposes only. Actual properties may vary based on specific die casting parameters, part design, and wall thickness. For applications requiring maximum corrosion resistance, specify AZ91D. Always consult with material specialists 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 3318 gallon liquid totes Special package is available on request.