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EN-MC65220 Magnesium vs. ASTM B685 Alloy

EN-MC65220 magnesium belongs to the magnesium alloys classification, while ASTM B685 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 EN-MC65220 magnesium and the bottom bar is ASTM B685 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
120
Poisson's Ratio 0.29
0.37
Shear Modulus, GPa 17
43
Tensile Strength: Ultimate (UTS), MPa 270
660 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 340
180
Melting Completion (Liquidus), °C 610
1230
Melting Onset (Solidus), °C 550
1200
Specific Heat Capacity, J/kg-K 980
300
Thermal Expansion, µm/m-K 26
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
5.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
4.1

Otherwise Unclassified Properties

Density, g/cm3 1.9
11

Common Calculations

Stiffness to Weight: Axial, points 13
6.1
Stiffness to Weight: Bending, points 62
15
Strength to Weight: Axial, points 40
17 to 27
Strength to Weight: Bending, points 49
16 to 21
Thermal Shock Resistance, points 17
28 to 46

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 0.050 to 0.1
39.5 to 40.5
Iron (Fe), % 0 to 0.010
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0
Nickel (Ni), % 0 to 0.0050
0
Palladium (Pd), % 0
59 to 60.5
Silicon (Si), % 0 to 0.010
0
Silver (Ag), % 1.3 to 1.7
0 to 0.1
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0 to 0.2
0 to 0.060
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0
0 to 0.2