Magnesium AZ92A-F, Cast,E FOUR

### **Product Datasheet: Magnesium Alloy AZ92A-F (Cast), UNS M11920** --- #### **1. Overview** Magnesium Alloy AZ92A-F is a high-strength magnesium-aluminum-zinc casting alloy supplied in the as-cast condition. The **"F"** temper designation indicates that castings are used without post-casting heat treatment. This alloy contains higher zinc content compared to the AZ91 series, resulting in improved strength characteristics while maintaining good castability for both sand and permanent mold casting processes. --- #### **2. Key Advantages** - **Good Strength-to-Weight Ratio:** Higher strength than AZ91 alloys in as-cast condition - **Excellent Castability:** Suitable for complex casting designs - **Good Machinability:** Can be machined at high speeds with excellent surface finish - **Cost-Effective:** No heat treatment required - **Good Wear Resistance:** Suitable for applications requiring abrasion resistance --- #### **3. Chemical Composition (Weight % per ASTM B80)** | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Aluminum (Al)** | 8.3 - 9.7 | **Zinc (Zn)** | 1.6 - 2.4 | | **Manganese (Mn)** | 0.10 - 0.35 | **Silicon (Si)** | ≤ 0.30 | | **Copper (Cu)** | ≤ 0.25 | **Iron (Fe)** | ≤ 0.05 | | **Nickel (Ni)** | ≤ 0.03 | **Other Impurities** | ≤ 0.30 | | **Magnesium (Mg)** | Balance | | | *Note: The higher zinc content (1.6-2.4%) compared to AZ91 alloys contributes to improved strength but may slightly reduce corrosion resistance.* --- #### **4. Physical & Mechanical Properties (Typical for Sand Cast F Temper)** | Property | Metric Unit | Imperial Unit | |----------|-------------|--------------| | **Density** | 1.82 g/cm³ | 0.066 lb/in³ | | **Melting Range** | 450 - 595 °C | 842 - 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 - 2 % | 1 - 2 % | | **Compressive Yield Strength** | 95 - 110 MPa | 14 - 16 ksi | | **Hardness (Brinell)** | 65 - 75 HB | 65 - 75 HB | | **Modulus of Elasticity** | 45 GPa | 6.5 × 10⁶ psi | | **Shear Strength** | 115 - 130 MPa | 17 - 19 ksi | | **Fatigue Strength** | 70 - 85 MPa | 10 - 12 ksi | --- #### **5. International Standards** - **ASTM International:** - **ASTM B80:** Standard Specification for Magnesium-Alloy Sand Castings - **ASTM B199:** Standard Specification for Magnesium-Alloy Permanent Mold Castings - **SAE International:** - **SAE AMS 4432:** Magnesium Alloy Castings, Sand 9Al-2Zn (AZ92A) - **Unified Numbering System (UNS):** - **UNS M11920** - **ISO Standards:** - **ISO 16220:** Magnesium and magnesium alloys - Cast products --- #### **6. Casting Characteristics** - **Pouring Temperature:** 680 - 730°C (1255 - 1345°F) - **Mold Temperature:** 200 - 400°C (390 - 750°F) - **Fluidity:** Good - suitable for thin sections (minimum 3mm) - **Shrinkage:** 0.6 - 0.8% - **Hot Tearing Tendency:** Moderate - requires careful gating design --- #### **7. Product Applications** AZ92A-F castings are used in applications requiring higher strength than AZ91 alloys: - **Aerospace Components:** - Gearbox housings and transmission cases - Structural brackets and supports - Engine accessory mounts - **Automotive Parts:** - High-performance engine components - Transmission cases - Bracket assemblies - **Industrial Equipment:** - Machinery bases and frames - High-strength housing components - Material handling equipment parts - **Defense Applications:** - Weapon system components - Military equipment housings --- #### **8. Technical Considerations** - **Corrosion Protection:** Requires surface treatments for corrosive environments - **Heat Treatment Capability:** Can be subsequently heat treated to T4 or T6 tempers - **Machinability:** Excellent - higher cutting speeds possible compared to aluminum - **Joining Methods:** Adhesive bonding, mechanical fastening, or welding with proper techniques - **Surface Finish:** As-cast surface typically requires finishing for cosmetic applications --- #### **9. Comparison with Other Alloys** - **vs. AZ91A-F:** Higher strength but lower ductility - **vs. AZ92A-T6:** Lower strength but more cost-effective - **vs. AM100A:** Better castability and corrosion resistance - **vs. ZK51A:** Better castability but lower strength --- #### **10. Quality Assurance** - **Non-Destructive Testing:** Suitable for radiographic, dye penetrant inspection - **Quality Standards:** Meets aerospace and automotive quality requirements - **Certification:** Available with full material traceability --- **Disclaimer:** This information is for reference purposes only. Properties may vary based on casting method, section size, and foundry practices. For applications requiring maximum mechanical properties, consider specifying AZ92A in 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 3322 gallon liquid totes Special package is available on request.