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AWS ERTi-12 vs. AZ91B Magnesium

AWS ERTi-12 belongs to the titanium alloys classification, while AZ91B magnesium belongs to the magnesium 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 AWS ERTi-12 and the bottom bar is AZ91B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
46
Elongation at Break, % 12
5.0
Fatigue Strength, MPa 200
79
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
18
Tensile Strength: Ultimate (UTS), MPa 480
240
Tensile Strength: Yield (Proof), MPa 340
160

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
11
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
58

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
11
Resilience: Unit (Modulus of Resilience), kJ/m3 550
280
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
69
Strength to Weight: Axial, points 30
38
Strength to Weight: Bending, points 30
49
Thermal Diffusivity, mm2/s 8.7
42
Thermal Shock Resistance, points 37
14

Alloy Composition

Aluminum (Al), % 0
8.3 to 9.7
Carbon (C), % 0 to 0.030
0
Copper (Cu), % 0
0 to 0.35
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.15
0
Magnesium (Mg), % 0
87.9 to 91.2
Manganese (Mn), % 0
0.13 to 0.5
Molybdenum (Mo), % 0.2 to 0.4
0
Nickel (Ni), % 0.060 to 0.090
0 to 0.030
Nitrogen (N), % 0 to 0.015
0
Oxygen (O), % 0.080 to 0.16
0
Silicon (Si), % 0
0 to 0.5
Titanium (Ti), % 99.147 to 99.66
0
Zinc (Zn), % 0
0.35 to 1.0