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AZ91D Magnesium vs. R56401 Titanium

AZ91D 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 (5, 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 AZ91D 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, % 2.3 to 4.5
9.1
Fatigue Strength, MPa 74 to 85
480
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
40
Shear Strength, MPa 120 to 140
560
Tensile Strength: Ultimate (UTS), MPa 160 to 220
940
Tensile Strength: Yield (Proof), MPa 80 to 130
850

Thermal Properties

Latent Heat of Fusion, J/g 350
410
Maximum Temperature: Mechanical, °C 130
340
Melting Completion (Liquidus), °C 600
1610
Melting Onset (Solidus), °C 490
1560
Specific Heat Capacity, J/kg-K 990
560
Thermal Conductivity, W/m-K 78
7.1
Thermal Expansion, µm/m-K 27
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 4.2 to 7.7
83
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
3440
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
35
Strength to Weight: Axial, points 26 to 34
59
Strength to Weight: Bending, points 38 to 46
48
Thermal Diffusivity, mm2/s 45
2.9
Thermal Shock Resistance, points 9.5 to 13
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 0.030
0
Hydrogen (H), % 0
0 to 0.012
Iron (Fe), % 0 to 0.0050
0 to 0.25
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0
Nickel (Ni), % 0 to 0.0020
0
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.13
Silicon (Si), % 0 to 0.1
0
Titanium (Ti), % 0
88.5 to 91
Vanadium (V), % 0
3.5 to 4.5
Zinc (Zn), % 0.35 to 1.0
0