Magnesium HM21A-T81 (UNS M13210)
HM21A-T81 is a precipitation-hardened magnesium alloy that is commonly used in aerospace applications. It is characterized by its high strength, toughness, and good corrosion resistance.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | Remainder | |
| Manganese | 0.45% | 1.1% |
| Thorium | 1.5% | 2.5% |
The following table provides a list of magnesium HM21A-T81 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 1780 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 255 MPa |
| Tensile Strength (Yield) | 210 MPa |
| Compressive Strength (Yield) | 180 MPa |
| Bearing Strength (Ultimate) | 455 MPa |
| Bearing Strength (Yield) | 320 MPa |
| Shear Strength | 170 MPa |
| Young’s Modulus (E) | 45 GPa |
| Shear Modulus (G) | 17 GPa |
| Elongation at Break in 50 mm | 6% |
| Poisson’s Ratio (ν) | 0.35 |
| Machinability | 100% |
| Thermal Properties | Metric |
| Melting Point | 605 - 650 °C |
| Solidus | 605 °C |
| Liquidus | 650 °C |
| Specific Heat Capacity (Cp) | 1000 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 26.8 1/°C |
| Heat of Fusion | 343 J/g |
| Electrical Properties | Metric |
| Electrical Resistivity | 5.00×10-6 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 HM21A-T81
| Advantages | Disadvantages |
|---|---|
| High strength | High cost |
| Good toughness | Low stiffness |
| Corrosion resistance | Poor weldability |
| Elevated temperature performance | Difficult to machine |
Applications of Magnesium HM21A-T81
Magnesium HM21A-T81 is a versatile and high-performance magnesium alloy that is used in a variety of applications. Some of the applications of Magnesium HM21A-T81 include:
- Aerospace: Magnesium HM21A-T81 is used in a number of aerospace applications, including aircraft structures, engine components, and landing gear.
- Automotive: Magnesium HM21A-T81 is used in a number of automotive applications, including engine blocks, cylinder heads, and brake rotors.
- Marine: Magnesium HM21A-T81 is used in a number of marine applications, including boat hulls, decks, and railings.
- Sporting goods: Magnesium HM21A-T81 is used in a number of sporting goods applications, including golf clubs, tennis rackets, and bicycles.
- Machinery: Magnesium HM21A-T81 is used in a number of machinery applications, including machine tools, robots, and conveyors.