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Annealed ASTM B541 vs. AZ31B-O Magnesium

Annealed ASTM B541 belongs to the otherwise unclassified metals classification, while AZ31B-O magnesium belongs to the magnesium alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, 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 annealed ASTM B541 and the bottom bar is AZ31B-O magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
45
Elongation at Break, % 14
12
Fatigue Strength, MPa 250
120
Poisson's Ratio 0.4
0.29
Shear Modulus, GPa 38
17
Shear Strength, MPa 410
140
Tensile Strength: Ultimate (UTS), MPa 670
240
Tensile Strength: Yield (Proof), MPa 480
120

Thermal Properties

Latent Heat of Fusion, J/g 90
350
Melting Completion (Liquidus), °C 1110
600
Melting Onset (Solidus), °C 930
600
Specific Heat Capacity, J/kg-K 170
990
Thermal Expansion, µm/m-K 13
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
18
Electrical Conductivity: Equal Weight (Specific), % IACS 4.0
95

Otherwise Unclassified Properties

Density, g/cm3 17
1.7

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
25
Resilience: Unit (Modulus of Resilience), kJ/m3 1090
170
Stiffness to Weight: Axial, points 3.4
15
Stiffness to Weight: Bending, points 9.0
70
Strength to Weight: Axial, points 11
39
Strength to Weight: Bending, points 9.8
50
Thermal Shock Resistance, points 36
14

Alloy Composition

Aluminum (Al), % 0
2.4 to 3.6
Calcium (Ca), % 0
0 to 0.040
Copper (Cu), % 13.5 to 15.5
0 to 0.050
Gold (Au), % 70.5 to 72.5
0
Iron (Fe), % 0
0 to 0.050
Magnesium (Mg), % 0
93.6 to 97.1
Manganese (Mn), % 0
0.050 to 1.0
Nickel (Ni), % 0
0 to 0.0050
Platinum (Pt), % 8.0 to 9.0
0
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 4.0 to 5.0
0
Zinc (Zn), % 0.7 to 1.3
0.5 to 1.5
Residuals, % 0
0 to 0.3