About Mg

Pure Mg

Atomic number 12, Atomic weight 24.3

HCP(Hexagonal Cross Packed) structure lattice

Infinite resource
- Abundant element (8th in earth crust, 3rd in sea water)
- Extracted from mineral ore and sea water (electrolytic method and thermal reduction method)

The lightest element among the structural metal elements

Increase of strength and elongation by alloying pure Mg with other elements

Mg Alloy

Suitable for designing lightweight parts due to high specific strength

Good for vibration absorbency due to high vibration loss coefficient
(Vibration loss coefficient: Mg 1.48 vs. Al 0.88)

Superior machinability due to lower machining power requirement (80% of Al)

Suitable for application on 3C products due to high electromagnetic wave shielding

Suitable for rapid heating and cooling due to low thermal capacity

Easy to recycle, similar to steel and Aluminum

Material Comparisons

Material Mg Alloy Steel AI Alloy
AZ31B E-form Heat Sinker GA STS304 5052-H32 6061-T6
Density (g/㎤) 1.78 1.80 1.74 7.87 8.0 2.66 2.69
Modulus of Elasticity (GPa) 45 45 45 201 200 70 69
Tensile Strength(MPa) 260 255 220 320 505 290 310
Yield Strength(MPa) 180 150 155 200 215 193 276
Elongation (%) 17 25 14 28 40 22 12
Thermal Conduct. (W/m·K) 85 110 138 46 16 138 167
Specific Heat (J/gk) 1.033 0.994 1.023 0.47 0.5 0.963 0.908
Electric Conduct.(x10-5 Ω·cm) 0.92 - - 1.42 7.20 0.50 0.40
Machinability (%) 100 100 - 55 - 30 -
Melting Point (°C) 632 800 650 1.515 1.455 638 646