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AZ91A Magnesium vs. R60802 Alloy

AZ91A magnesium belongs to the magnesium alloys classification, while R60802 alloy belongs to the otherwise unclassified metals. There are 20 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 AZ91A magnesium and the bottom bar is R60802 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
98
Elongation at Break, % 5.0
22
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
36
Tensile Strength: Ultimate (UTS), MPa 240
430
Tensile Strength: Yield (Proof), MPa 160
270

Thermal Properties

Latent Heat of Fusion, J/g 360
250
Specific Heat Capacity, J/kg-K 990
270
Thermal Conductivity, W/m-K 73
22
Thermal Expansion, µm/m-K 26
6.0

Otherwise Unclassified Properties

Density, g/cm3 1.7
6.5
Embodied Water, L/kg 990
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
85
Resilience: Unit (Modulus of Resilience), kJ/m3 280
380
Stiffness to Weight: Axial, points 15
8.3
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
18
Strength to Weight: Bending, points 49
19
Thermal Diffusivity, mm2/s 42
12
Thermal Shock Resistance, points 14
53

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Chromium (Cr), % 0
0.050 to 0.15
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
0.070 to 0.2
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0.030 to 0.080
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
1.2 to 1.7
Zinc (Zn), % 0.35 to 1.0
0
Zirconium (Zr), % 0
97.8 to 98.7
Residuals, % 0
0 to 0.11