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AZ91B Magnesium vs. R58150 Titanium

AZ91B magnesium belongs to the magnesium alloys classification, while R58150 titanium belongs to the titanium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, 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 AZ91B magnesium and the bottom bar is R58150 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
140
Elongation at Break, % 5.0
13
Fatigue Strength, MPa 79
330
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
52
Shear Strength, MPa 140
470
Tensile Strength: Ultimate (UTS), MPa 240
770
Tensile Strength: Yield (Proof), MPa 160
550

Thermal Properties

Latent Heat of Fusion, J/g 360
410
Maximum Temperature: Mechanical, °C 130
320
Melting Completion (Liquidus), °C 600
1760
Melting Onset (Solidus), °C 470
1700
Specific Heat Capacity, J/kg-K 990
500
Thermal Expansion, µm/m-K 26
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
48
Density, g/cm3 1.7
5.4
Embodied Carbon, kg CO2/kg material 22
31
Embodied Energy, MJ/kg 160
480
Embodied Water, L/kg 990
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
94
Resilience: Unit (Modulus of Resilience), kJ/m3 280
1110
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
32
Strength to Weight: Axial, points 38
40
Strength to Weight: Bending, points 49
35
Thermal Shock Resistance, points 14
48

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.1
Copper (Cu), % 0 to 0.35
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0
0 to 0.1
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Molybdenum (Mo), % 0
14 to 16
Nickel (Ni), % 0 to 0.030
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Silicon (Si), % 0 to 0.5
0
Titanium (Ti), % 0
83.5 to 86
Zinc (Zn), % 0.35 to 1.0
0