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ASTM B685 Alloy vs. ZK60A Magnesium

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while ZK60A magnesium belongs to the magnesium alloys. 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 ASTM B685 alloy and the bottom bar is ZK60A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
46
Poisson's Ratio 0.37
0.29
Shear Modulus, GPa 43
18
Tensile Strength: Ultimate (UTS), MPa 660 to 1060
320 to 330

Thermal Properties

Latent Heat of Fusion, J/g 180
330
Melting Completion (Liquidus), °C 1230
600
Melting Onset (Solidus), °C 1200
550
Specific Heat Capacity, J/kg-K 300
960
Thermal Expansion, µm/m-K 14
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 5.0
29 to 30
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
140

Otherwise Unclassified Properties

Density, g/cm3 11
1.9

Common Calculations

Stiffness to Weight: Axial, points 6.1
13
Stiffness to Weight: Bending, points 15
63
Strength to Weight: Axial, points 17 to 27
47 to 49
Strength to Weight: Bending, points 16 to 21
55 to 56
Thermal Shock Resistance, points 28 to 46
19 to 20

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 39.5 to 40.5
0
Iron (Fe), % 0 to 0.050
0
Lead (Pb), % 0 to 0.030
0
Magnesium (Mg), % 0
92.5 to 94.8
Palladium (Pd), % 59 to 60.5
0
Silver (Ag), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.060
4.8 to 6.2
Zirconium (Zr), % 0
0.45 to 1.0
Residuals, % 0
0 to 0.3