Magnesium AZ92A-T7 (UNS M11920)
AZ92A-T7 is a high-strength magnesium alloy frequently utilized in sand and permanent mold castings. Renowned for its excellent tensile and yield strength combined with low density, it delivers a lightweight solution ideal for applications demanding strength and weight efficiency.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | —— | Remainder |
| Aluminum | 8.3% | 9.7% |
| Copper | —— | 0.25% |
| Manganese | 0.1% | —— |
| Nickel | —— | 0.01% |
| Silicon | —— | 0.3% |
| Zinc | 1.6% | 2.4% |
The following table provides a list of magnesium AZ92A-T7 properties in both SI and US customary/Imperial units.
Click on the button to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 1830 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 275 MPa |
| Tensile Strength (Yield) | 145 MPa |
| Fatigue Strength # of Cycles 5.0e+8 | 90 MPa |
| Shear Strength | 150 MPa |
| Young’s Modulus (E) | 45 GPa |
| Shear Modulus (G) | 17 GPa |
| Elongation at Break in 50 mm | 3% |
| Poisson’s Ratio (ν) | 0.35 |
| Brinell Hardness 500 kg load, 10 mm ball | 78 |
| Knoop Hardness Converted from Brinell | 101 |
| Rockwell Hardness | 86 |
| Vickers Hardness Converted from Brinell | 88 |
| Machinability | 100% |
| Thermal Properties | Metric |
| Melting Point Incipient Melting | ≥ 410 °C |
| Solidus | 445 °C |
| Liquidus | 595 °C |
| Thermal Conductivity (T6 Temper) | 58.3 W/m·K |
| Specific Heat Capacity (Cp) | 1050 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 26.0 1/°C |
| Heat of Fusion | 373 J/g |
| Electrical Properties | Metric |
| Electrical Resistivity (T6 Temper) | 1.24×10-5 Ω·cm |
The values in this table are approximate and can vary depending on various factors such as the specific manufacturing process and heat treatment applied to the alloy.
Advantages & Disadvantages of Magnesium AZ92A-T7
| Advantages | Disadvantages |
|---|---|
| High strength | Corrosion-prone |
| Good machinability | Low melting point |
| Lightweight | High cost |
Applications of Magnesium AZ92A-T7
AZ92A-T7 finds extensive use across multiple industries, supporting diverse applications that benefit from its strength, light weight, and durability, including:
- Automotive: Engine blocks, transmission housings, suspension components, brake rotors, wheels
- Aerospace: Aircraft bodies, engine parts, rocket casings, satellite bodies
- Construction: Building frames, roofing panels, windows and doors, staircases
- Marine: Boat hulls, propellers, rudders, lifeboats
- Electronics: Laptop frames, cellphone cases, computer monitors, televisions