HK31A
UNS M13310
Description
Magnesium alloy HK31A is a magnesium-thorium-zirconium wrought alloy that can be heat treated for improved mechanical properties above 260 ℃. It has been proved that compared with other comparatively superior alloys, HK31A stands out because of its light weight, ease of machinability, lower cost, impressive moduli, tensile strength, and heat capacity.
Alfa Chemistry focus on the types of HK31A-O, HK31A-H24, and HK31A-T6.
General Information
| Items | HK31A-O | HK31A-H24 | HK31A-T6 |
|---|---|---|---|
| Catalog | ACAM-Mg-A017 | ACAM-Mg-A018 | ACAM-Mg-A019 |
| Density | 1.80 g/cm3 | 1.80 g/cm3 | 1.80 g/cm3 |
| Melting Range | 590-650 °C | 590-650 °C | 590-650 °C |
Chemical Component
| Mg | Th | Zr | Zn | Cu | Ni |
|---|---|---|---|---|---|
| 96.0 min | 2.5-4.0 | 0.4-1.0 | 0.30 max | 0.1 max | 0.01 max |
* Unit: %
Typical Mechanical Properties
| Items | HK31A-O | HK31A-H24 | HK31A-T6 |
|---|---|---|---|
| Tensile Strength, Ultimate | 200 MPa | 250 MPa | 220 MPa |
| Tensile Strength, Yield | 120 MPa | 190 MPa | 105 MPa |
| Elongation at Break | 30% | 15% | 8% |
| Tensile Modulus | 45.0 GPa | 45.0 GPa | 45.0 GPa |
| Compressive Yield Strength | 97.0 MPa | -- | -- |
| Poissons Ratio | 0.35 | 0.35 | 0.35 |
| Machinability | 100% | 100% | 100% |
| Shear Modulus | 17.0 GPa | 17.0 GPa | 17.0 GPa |
| Charpy Impact | 3.40 J | -- | -- |
Material Forms
HK31A-O: Sheet, Plate (annealed and re-crystallized)
HK31A-H24: Sheet, Plate (cold rolled and partially annealed)
HK31A-T6: Sand Casting
Applications
Magnesium alloy HK31A is used in several high-volume part manufacturing applications, including automotive and truck components. Currently its use in aerospace is increasing, mostly driven by the increasing importance of fuel economy and the need to reduce weight.
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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