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AWS ERTi-7 vs. AZ91B Magnesium

AWS ERTi-7 belongs to the titanium alloys classification, while AZ91B magnesium belongs to the magnesium alloys. There are 28 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-7 and the bottom bar is AZ91B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
46
Elongation at Break, % 20
5.0
Fatigue Strength, MPa 190
79
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
18
Tensile Strength: Ultimate (UTS), MPa 340
240
Tensile Strength: Yield (Proof), MPa 280
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 7.3
58

Otherwise Unclassified Properties

Density, g/cm3 4.5
1.7
Embodied Carbon, kg CO2/kg material 47
22
Embodied Energy, MJ/kg 800
160
Embodied Water, L/kg 470
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
11
Resilience: Unit (Modulus of Resilience), kJ/m3 360
280
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
69
Strength to Weight: Axial, points 21
38
Strength to Weight: Bending, points 24
49
Thermal Diffusivity, mm2/s 8.8
42
Thermal Shock Resistance, points 26
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 0.12
0
Magnesium (Mg), % 0
87.9 to 91.2
Manganese (Mn), % 0
0.13 to 0.5
Nickel (Ni), % 0
0 to 0.030
Nitrogen (N), % 0 to 0.015
0
Oxygen (O), % 0.080 to 0.16
0
Palladium (Pd), % 0.12 to 0.25
0
Silicon (Si), % 0
0 to 0.5
Titanium (Ti), % 99.417 to 99.8
0
Zinc (Zn), % 0
0.35 to 1.0