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AZ91A Magnesium vs. AWS ERTi-2

AZ91A magnesium belongs to the magnesium alloys classification, while AWS ERTi-2 belongs to the titanium alloys. There are 29 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 AZ91A magnesium and the bottom bar is AWS ERTi-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
20
Fatigue Strength, MPa 99
190
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
40
Tensile Strength: Ultimate (UTS), MPa 240
340
Tensile Strength: Yield (Proof), MPa 160
280

Thermal Properties

Latent Heat of Fusion, J/g 360
420
Maximum Temperature: Mechanical, °C 130
320
Melting Completion (Liquidus), °C 600
1670
Melting Onset (Solidus), °C 470
1620
Specific Heat Capacity, J/kg-K 990
540
Thermal Conductivity, W/m-K 73
21
Thermal Expansion, µm/m-K 26
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 52
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 12
37
Density, g/cm3 1.7
4.5
Embodied Carbon, kg CO2/kg material 22
31
Embodied Energy, MJ/kg 160
510
Embodied Water, L/kg 990
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
64
Resilience: Unit (Modulus of Resilience), kJ/m3 280
360
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
35
Strength to Weight: Axial, points 38
21
Strength to Weight: Bending, points 49
24
Thermal Diffusivity, mm2/s 42
8.7
Thermal Shock Resistance, points 14
27

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.030
Copper (Cu), % 0 to 0.1
0
Hydrogen (H), % 0
0 to 0.0080
Iron (Fe), % 0
0 to 0.12
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Nitrogen (N), % 0
0 to 0.015
Oxygen (O), % 0
0.080 to 0.16
Silicon (Si), % 0 to 0.5
0
Titanium (Ti), % 0
99.667 to 99.92
Zinc (Zn), % 0.35 to 1.0
0