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AZ91B Magnesium vs. Titanium 6-7

AZ91B magnesium belongs to the magnesium alloys classification, while titanium 6-7 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 titanium 6-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
11
Fatigue Strength, MPa 79
530
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
45
Shear Strength, MPa 140
610
Tensile Strength: Ultimate (UTS), MPa 240
1020
Tensile Strength: Yield (Proof), MPa 160
900

Thermal Properties

Latent Heat of Fusion, J/g 360
410
Maximum Temperature: Mechanical, °C 130
300
Melting Completion (Liquidus), °C 600
1700
Melting Onset (Solidus), °C 470
1650
Specific Heat Capacity, J/kg-K 990
520
Thermal Expansion, µm/m-K 26
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
75
Density, g/cm3 1.7
5.1
Embodied Carbon, kg CO2/kg material 22
34
Embodied Energy, MJ/kg 160
540
Embodied Water, L/kg 990
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
110
Resilience: Unit (Modulus of Resilience), kJ/m3 280
3460
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
32
Strength to Weight: Axial, points 38
56
Strength to Weight: Bending, points 49
44
Thermal Shock Resistance, points 14
66

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 0.0090
Iron (Fe), % 0
0 to 0.25
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Molybdenum (Mo), % 0
6.5 to 7.5
Nickel (Ni), % 0 to 0.030
0
Niobium (Nb), % 0
6.5 to 7.5
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Silicon (Si), % 0 to 0.5
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
84.9 to 88
Zinc (Zn), % 0.35 to 1.0
0