Magnesium AS41B-F, Die Cast， UNS M10412; Mg; ASTM B 94; European EN 1753 MC 21320 (Ingot UNS M10413),E FOUR

**Product Data Sheet: Magnesium AS41B-F, Die Cast** **UNS M10412; ASTM B94; EN 1753 MC21320 (Ingot UNS M10413)** --- **1. Overview** Magnesium AS41B-F is a premium high-temperature magnesium-aluminum-silicon die casting alloy with enhanced purity control for superior creep resistance and mechanical properties at elevated temperatures. The "B" designation indicates stricter control over impurity elements, resulting in improved corrosion resistance and thermal stability compared to standard AS41A alloy. --- **2. International Standards** - **ASTM**: B94 (Die Castings) - **UNS**: M10412 (Castings), M10413 (Ingot) - **EN**: 1753 MC21320 - **ISO**: 16220 - **SAE**: J465 - **DIN**: MgAl4Si - **JIS**: H 5303 - **GB/T**: 19078 --- **3. Chemical Composition (wt%)** | Element | Minimum | Maximum | |------------------|--------------|--------------| | Magnesium (Mg) | Balance | Balance | | Aluminum (Al) | 3.7 | 4.5 | | Silicon (Si) | 0.6 | 1.0 | | Manganese (Mn) | 0.20 | 0.40 | | Zinc (Zn) | – | 0.08 | | Copper (Cu) | – | 0.04 | | Iron (Fe) | – | 0.0035 | | Nickel (Ni) | – | 0.003 | | Other Impurities | – | 0.30 | --- **4. Physical Properties** | Property | Value | |-------------------------------|---------------------------------| | Density | 1.77 g/cm³ (0.064 lb/in³) | | Melting Range | 565-610°C (1049-1130°F) | | Thermal Conductivity | 76 W/m·K (at 25°C) | | Electrical Resistivity | 11.2 nΩ·m | | Coefficient of Thermal Expansion | 26.0 μm/m·°C (20-100°C) | | Specific Heat Capacity | 1050 J/kg·K | | Solidification Shrinkage | 4.0% | --- **5. Mechanical Properties (As-Die Cast)** | Property | Value (20°C) | Value (150°C) | |-------------------------------|---------------------|---------------------| | Tensile Strength | 195-215 MPa | 140-160 MPa | | Yield Strength (0.2% Offset) | 115-135 MPa | 90-105 MPa | | Elongation (% in 50 mm) | 9-13% | 14-20% | | Hardness (Brinell) | 60-66 HB | 44-50 HB | | Fatigue Strength | 88-98 MPa | 62-72 MPa | | Modulus of Elasticity | 45 GPa | 42 GPa | | Impact Strength (Charpy) | 4.5-5.5 J | 6.0-7.0 J | --- **6. High-Temperature Performance** - Maximum continuous service temperature: 175°C (347°F) - 100-hour creep strength (150°C): 62 MPa - 1000-hour creep strength (150°C): 48 MPa - Excellent thermal stability and creep resistance - Superior performance in thermal cycling applications --- **7. Die Casting Characteristics** - Excellent fluidity and mold filling capability - Optimal for wall thicknesses: 2.5-5.0 mm - Good hot tearing resistance - Enhanced die soldering resistance - Cycle time: 25-45 seconds - Surface finish: Ra 0.6-1.0 μm --- **8. Typical Die Casting Parameters** - Melt Temperature: 660-690°C (1220-1274°F) - Die Temperature: 220-280°C (428-536°F) - Injection Pressure: 50-90 MPa (7250-13050 psi) - Gate Velocity: 35-65 m/s - Intensification Pressure: 70-110 MPa (10150-15950 psi) --- **9. Applications** - **Automotive Powertrain**: Transmission housings, engine blocks, oil pans - **Automotive Components**: Intake manifolds, thermostat housings, engine brackets - **Aerospace**: Gearbox housings, accessory drive components - **Industrial**: Pump housings, compressor casings, high-temperature machinery parts - **Electronics**: Power electronics enclosures, motor housings --- **10. Corrosion Resistance** - Enhanced atmospheric corrosion resistance - Superior high-temperature oxidation resistance - Excellent performance in automotive under-hood environments - Compatible with advanced protective treatments: - Chrome-free conversion coatings - Plasma electrolytic oxidation - E-coating systems - High-temperature powder coatings --- **11. Fabrication & Secondary Operations** - **Machining**: Excellent machinability with improved surface finish - **Joining**: Superior for adhesive bonding and mechanical fastening - **Welding**: TIG welding with compatible filler materials - **Finishing**: Excellent response to all surface treatment processes --- **12. Key Advantages** - Superior creep resistance at 120-175°C - Enhanced corrosion resistance through purity control - Excellent thermal stability and mechanical properties - Improved high-temperature performance over AS41A - Good castability for complex geometries - Excellent strength-to-weight ratio at elevated temperatures --- **13. Design Considerations** - Ideal for high-temperature applications under sustained load - Suitable for automotive powertrain and transmission components - Excellent for parts requiring thermal cycling resistance - Enhanced purity provides better corrosion performance - Optimal balance of castability and high-temperature properties --- **14. Quality Assurance & Testing** - Chemical analysis per ASTM E1097 - Mechanical testing per ASTM B557 - High-temperature testing per ASTM E21 - Creep and stress rupture testing per ASTM E139 - Radiographic inspection per ASTM E505 - Corrosion testing per ASTM B117 --- **15. Comparative Performance** | Property (at 150°C) | AS41B-F | AS41A-F | AZ91D | |-----------------------------|-------------|-------------|-------------| | Tensile Strength (MPa) | 140-160 | 130-150 | 80-100 | | 100-h Creep Strength (MPa) | 62 | 55 | 25 | | Corrosion Resistance | Excellent | Good | Fair | | Room Temp Yield (MPa) | 115-135 | 105-125 | 150-165 | | High-Temp Stability | Excellent | Very Good | Fair | --- *Note: Mechanical properties are typical for wall thicknesses of 3-5 mm. Performance may vary based on specific casting parameters and component design. For critical high-temperature applications, comprehensive validation testing under actual service conditions is essential. Consult with materials engineers for application-specific recommendations.*

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 3285 gallon liquid totes Special package is available on request.