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ISO-WD32250 Magnesium vs. ASTM B780 Alloy

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while ASTM B780 alloy belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (13, 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 ISO-WD32250 magnesium and the bottom bar is ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
83
Elongation at Break, % 4.5 to 8.6
1.1 to 9.1
Poisson's Ratio 0.29
0.36
Shear Modulus, GPa 17
30
Shear Strength, MPa 180 to 190
200 to 340
Tensile Strength: Ultimate (UTS), MPa 310 to 330
330 to 590

Thermal Properties

Latent Heat of Fusion, J/g 340
140
Specific Heat Capacity, J/kg-K 980
270
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
70 to 76
Electrical Conductivity: Equal Weight (Specific), % IACS 130
62 to 68

Otherwise Unclassified Properties

Density, g/cm3 1.8
10

Common Calculations

Stiffness to Weight: Axial, points 14
4.5
Stiffness to Weight: Bending, points 67
14
Strength to Weight: Axial, points 49 to 51
9.1 to 16
Strength to Weight: Bending, points 58 to 60
11 to 15
Thermal Shock Resistance, points 19 to 20
16 to 29

Alloy Composition


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Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 0
23.5 to 25.7
Iron (Fe), % 0
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 94.9 to 97.1
0
Nickel (Ni), % 0
0.35 to 0.65
Silver (Ag), % 0
74 to 76
Zinc (Zn), % 2.5 to 4.0
0 to 0.060
Zirconium (Zr), % 0.45 to 0.8
0
Residuals, % 0 to 0.3
0