Magnesium HK31A-T6 (UNS M13310)
HK31A-T6 is a high-strength, cast magnesium alloy valued for its superior castability, pressure tightness, and resistance to creep. Commonly applied across aerospace, automotive, and industrial machinery, this alloy combines lightweight properties with durability, making it ideal for demanding structural components and performance-critical applications.
Looking to buy magnesium?
Check pricing and availability through our trusted partner:
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Magnesium | —— | Remainder |
| Copper | —— | 0.1% |
| Nickel | —— | 0.01% |
| Thorium | 2.5% | 4.0% |
| Zinc | —— | 0.3% |
| Zirconium | 0.4% | 1.0% |
The following table provides a list of magnesium HK31A-T6 properties in both SI and US customary/Imperial units.
Click on the button to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 1800 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 220 MPa |
| Tensile Strength (Yield) | 120 MPa |
| Compressive Strength (Yield) | 105 MPa |
| Bearing Strength (Ultimate) | 420 MPa |
| Bearing Strength (Yield) | 275 MPa |
| Fatigue Strength # of Cycles 1.0e+8 | 70 MPa |
| Shear Strength | 145 MPa |
| Young’s Modulus (E) | 45 GPa |
| Shear Modulus (G) | 17 GPa |
| Elongation at Break in 50 mm | 8% |
| Poisson’s Ratio (ν) | 0.35 |
| Brinell Hardness 500 kg load, 10 mm ball | 55 |
| Knoop Hardness Converted from Brinell | 70 |
| Machinability | 100% |
| Charpy Impact V-notch | 3.80 J |
| Thermal Properties | Metric |
| Melting Point | 590 - 650 °C |
| Solidus | 590 °C |
| Liquidus | 650 °C |
| Thermal Conductivity | 92 W/m·K |
| Specific Heat Capacity (Cp) | 1000 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 26.8 1/°C |
| Heat of Fusion | 325 J/g |
| Electrical Properties | Metric |
| Electrical Resistivity | 7.70×10-6 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 HK31A-T6
| Advantages | Disadvantages |
|---|---|
| High strength-to-weight ratio | Reactive to oxidation |
| Good damping capacity | Limited temperature range |
| Good corrosion resistance | Higher cost |
| Excellent machinability |
Applications of Magnesium HK31A-T6
HK31A-T6 is widely utilized in aerospace and defense industries, offering excellent corrosion resistance and lightweight durability in applications including:
- Aircraft Components: Used in manufacturing structural parts such as fuselage frames, wing structures, and landing gear components.
- Engine Components: Suitable for lightweight, strong parts including engine housings, gearbox casings, and other structural elements.
- Helicopter Components: Applied in rotor hubs, transmission housings, and other structural parts requiring low density and high strength.
- Spacecraft Applications: Employed in satellite structures, propulsion systems, and components needing an optimal balance of weight and strength.
- Defense Industry: Used in military aircraft, missiles, and defense structures demanding lightweight materials without sacrificing strength or durability.