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EQ21A Magnesium vs. ASTM B522 Class I

EQ21A magnesium belongs to the magnesium alloys classification, while ASTM B522 class I belongs to the otherwise unclassified metals. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is EQ21A magnesium and the bottom bar is ASTM B522 class I.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
96
Elongation at Break, % 2.4
1.1 to 29
Poisson's Ratio 0.29
0.41
Shear Modulus, GPa 17
34
Shear Strength, MPa 150
180 to 280
Tensile Strength: Ultimate (UTS), MPa 250
280 to 490
Tensile Strength: Yield (Proof), MPa 190
120 to 210

Thermal Properties

Latent Heat of Fusion, J/g 340
77
Melting Completion (Liquidus), °C 640
1030
Melting Onset (Solidus), °C 560
1030
Specific Heat Capacity, J/kg-K 980
160
Thermal Expansion, µm/m-K 27
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
11
Electrical Conductivity: Equal Weight (Specific), % IACS 120
5.8

Otherwise Unclassified Properties

Density, g/cm3 1.9
17

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
4.5 to 64
Resilience: Unit (Modulus of Resilience), kJ/m3 410
75 to 230
Stiffness to Weight: Axial, points 13
3.1
Stiffness to Weight: Bending, points 63
8.9
Strength to Weight: Axial, points 37
4.4 to 7.8
Strength to Weight: Bending, points 47
5.5 to 8.0
Thermal Shock Resistance, points 15
13 to 24

Alloy Composition


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Copper (Cu), % 0.050 to 0.1
0
Gold (Au), % 0
68 to 70
Magnesium (Mg), % 93.9 to 96.8
0
Nickel (Ni), % 0 to 0.010
0
Platinum (Pt), % 0
5.0 to 7.0
Silver (Ag), % 1.3 to 1.7
23.5 to 26.5
Unspecified Rare Earths, % 1.5 to 3.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.35