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AWS ERTi-2 vs. AZ91D Magnesium

AWS ERTi-2 belongs to the titanium alloys classification, while AZ91D magnesium belongs to the magnesium alloys. There are 29 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 AWS ERTi-2 and the bottom bar is AZ91D magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
46
Elongation at Break, % 20
2.3 to 4.5
Fatigue Strength, MPa 190
74 to 85
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
18
Tensile Strength: Ultimate (UTS), MPa 340
160 to 220
Tensile Strength: Yield (Proof), MPa 280
80 to 130

Thermal Properties

Latent Heat of Fusion, J/g 420
350
Maximum Temperature: Mechanical, °C 320
130
Melting Completion (Liquidus), °C 1670
600
Melting Onset (Solidus), °C 1620
490
Specific Heat Capacity, J/kg-K 540
990
Thermal Conductivity, W/m-K 21
78
Thermal Expansion, µm/m-K 8.7
27

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 64
4.2 to 7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 360
69 to 170
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
69
Strength to Weight: Axial, points 21
26 to 34
Strength to Weight: Bending, points 24
38 to 46
Thermal Diffusivity, mm2/s 8.7
45
Thermal Shock Resistance, points 27
9.5 to 13

Alloy Composition

Aluminum (Al), % 0
8.3 to 9.7
Carbon (C), % 0 to 0.030
0
Copper (Cu), % 0
0 to 0.030
Hydrogen (H), % 0 to 0.0080
0
Iron (Fe), % 0 to 0.12
0 to 0.0050
Magnesium (Mg), % 0
88.7 to 91.2
Manganese (Mn), % 0
0.15 to 0.5
Nickel (Ni), % 0
0 to 0.0020
Nitrogen (N), % 0 to 0.015
0
Oxygen (O), % 0.080 to 0.16
0
Silicon (Si), % 0
0 to 0.1
Titanium (Ti), % 99.667 to 99.92
0
Zinc (Zn), % 0
0.35 to 1.0