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ASTM B541 Gold vs. AZ63A Magnesium

ASTM B541 gold belongs to the otherwise unclassified metals classification, while AZ63A magnesium belongs to the magnesium alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, 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 B541 gold and the bottom bar is AZ63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
46
Elongation at Break, % 6.0 to 14
2.2 to 8.0
Poisson's Ratio 0.4
0.29
Shear Modulus, GPa 38
18
Shear Strength, MPa 410 to 690
110 to 160
Tensile Strength: Ultimate (UTS), MPa 670 to 1180
190 to 270
Tensile Strength: Yield (Proof), MPa 480 to 900
81 to 120

Thermal Properties

Latent Heat of Fusion, J/g 90
350
Melting Completion (Liquidus), °C 1110
610
Melting Onset (Solidus), °C 930
450
Specific Heat Capacity, J/kg-K 170
980
Thermal Expansion, µm/m-K 13
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7 to 12
12 to 15
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0 to 6.2
59 to 74

Otherwise Unclassified Properties

Density, g/cm3 17
1.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65 to 91
3.7 to 16
Resilience: Unit (Modulus of Resilience), kJ/m3 1090 to 3830
71 to 160
Stiffness to Weight: Axial, points 3.4
14
Stiffness to Weight: Bending, points 9.0
66
Strength to Weight: Axial, points 11 to 19
29 to 41
Strength to Weight: Bending, points 9.8 to 14
40 to 51
Thermal Shock Resistance, points 36 to 63
11 to 16

Alloy Composition

Aluminum (Al), % 0
5.3 to 6.7
Copper (Cu), % 13.5 to 15.5
0 to 0.25
Gold (Au), % 70.5 to 72.5
0
Magnesium (Mg), % 0
88.6 to 92.1
Manganese (Mn), % 0
0.15 to 0.35
Nickel (Ni), % 0
0 to 0.010
Platinum (Pt), % 8.0 to 9.0
0
Silicon (Si), % 0
0 to 0.3
Silver (Ag), % 4.0 to 5.0
0
Zinc (Zn), % 0.7 to 1.3
2.5 to 3.5
Residuals, % 0
0 to 0.3