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EN-MC65120 Magnesium vs. Grade 21 Titanium

EN-MC65120 magnesium belongs to the magnesium alloys classification, while grade 21 titanium belongs to the titanium 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 EN-MC65120 magnesium and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
140
Elongation at Break, % 3.1
9.0 to 17
Fatigue Strength, MPa 80
550 to 660
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 17
51
Shear Strength, MPa 92
550 to 790
Tensile Strength: Ultimate (UTS), MPa 160
890 to 1340
Tensile Strength: Yield (Proof), MPa 110
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 330
410
Maximum Temperature: Mechanical, °C 180
310
Melting Completion (Liquidus), °C 590
1740
Melting Onset (Solidus), °C 520
1690
Specific Heat Capacity, J/kg-K 970
500
Thermal Conductivity, W/m-K 100
7.5
Thermal Expansion, µm/m-K 26
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 25
60
Density, g/cm3 1.9
5.4
Embodied Carbon, kg CO2/kg material 25
32
Embodied Energy, MJ/kg 190
490
Embodied Water, L/kg 930
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 140
2760 to 5010
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 62
32
Strength to Weight: Axial, points 23
46 to 69
Strength to Weight: Bending, points 34
38 to 50
Thermal Diffusivity, mm2/s 56
2.8
Thermal Shock Resistance, points 9.8
66 to 100

Alloy Composition


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Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0
0 to 0.050
Copper (Cu), % 0 to 0.030
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.010
0 to 0.4
Magnesium (Mg), % 91.8 to 95.1
0
Manganese (Mn), % 0 to 0.15
0
Molybdenum (Mo), % 0
14 to 16
Nickel (Ni), % 0 to 0.0050
0
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.17
Silicon (Si), % 0 to 0.010
0.15 to 0.25
Titanium (Ti), % 0
76 to 81.2
Unspecified Rare Earths, % 2.5 to 4.0
0
Zinc (Zn), % 2.0 to 3.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0 to 0.4