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Grade 7 Titanium vs. ISO-WD21150 Magnesium

Grade 7 titanium belongs to the titanium alloys classification, while ISO-WD21150 magnesium belongs to the magnesium alloys. There are 28 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 grade 7 titanium and the bottom bar is ISO-WD21150 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
45
Elongation at Break, % 24
5.7 to 11
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 38
17
Shear Strength, MPa 270
150 to 170
Tensile Strength: Ultimate (UTS), MPa 420
240 to 290
Tensile Strength: Yield (Proof), MPa 340
120 to 200

Thermal Properties

Latent Heat of Fusion, J/g 420
350
Maximum Temperature: Mechanical, °C 320
110
Melting Completion (Liquidus), °C 1660
600
Melting Onset (Solidus), °C 1610
550
Specific Heat Capacity, J/kg-K 540
990
Thermal Conductivity, W/m-K 22
100
Thermal Expansion, µm/m-K 9.2
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
19
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
100

Otherwise Unclassified Properties

Density, g/cm3 4.5
1.7
Embodied Carbon, kg CO2/kg material 47
23
Embodied Energy, MJ/kg 800
160
Embodied Water, L/kg 470
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
15 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 560
160 to 460
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
70
Strength to Weight: Axial, points 26
40 to 48
Strength to Weight: Bending, points 28
52 to 58
Thermal Diffusivity, mm2/s 8.9
60
Thermal Shock Resistance, points 31
15 to 17

Alloy Composition

Aluminum (Al), % 0
2.4 to 3.6
Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
0 to 0.050
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
0 to 0.0050
Magnesium (Mg), % 0
94 to 97
Manganese (Mn), % 0
0.15 to 0.4
Nickel (Ni), % 0
0 to 0.0050
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Palladium (Pd), % 0.12 to 0.25
0
Silicon (Si), % 0
0 to 0.1
Titanium (Ti), % 98.7 to 99.88
0
Zinc (Zn), % 0
0.5 to 1.5
Residuals, % 0
0 to 0.3