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AZ91B Magnesium vs. R56401 Titanium

AZ91B magnesium belongs to the magnesium alloys classification, while R56401 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 R56401 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
9.1
Fatigue Strength, MPa 79
480
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
40
Shear Strength, MPa 140
560
Tensile Strength: Ultimate (UTS), MPa 240
940
Tensile Strength: Yield (Proof), MPa 160
850

Thermal Properties

Latent Heat of Fusion, J/g 360
410
Maximum Temperature: Mechanical, °C 130
340
Melting Completion (Liquidus), °C 600
1610
Melting Onset (Solidus), °C 470
1560
Specific Heat Capacity, J/kg-K 990
560
Thermal Conductivity, W/m-K 73
7.1
Thermal Expansion, µm/m-K 26
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 58
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
36
Density, g/cm3 1.7
4.5
Embodied Carbon, kg CO2/kg material 22
38
Embodied Energy, MJ/kg 160
610
Embodied Water, L/kg 990
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
83
Resilience: Unit (Modulus of Resilience), kJ/m3 280
3440
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
35
Strength to Weight: Axial, points 38
59
Strength to Weight: Bending, points 49
48
Thermal Diffusivity, mm2/s 42
2.9
Thermal Shock Resistance, points 14
67

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
5.5 to 6.5
Carbon (C), % 0
0 to 0.080
Copper (Cu), % 0 to 0.35
0
Hydrogen (H), % 0
0 to 0.012
Iron (Fe), % 0
0 to 0.25
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.13
Silicon (Si), % 0 to 0.5
0
Titanium (Ti), % 0
88.5 to 91
Vanadium (V), % 0
3.5 to 4.5
Zinc (Zn), % 0.35 to 1.0
0