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AZ61A Magnesium vs. Grade 18 Titanium

AZ61A magnesium belongs to the magnesium alloys classification, while grade 18 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 AZ61A magnesium and the bottom bar is grade 18 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 11
11 to 17
Fatigue Strength, MPa 130
330 to 480
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 17
40
Shear Strength, MPa 150
420 to 590
Tensile Strength: Ultimate (UTS), MPa 280
690 to 980
Tensile Strength: Yield (Proof), MPa 170
540 to 810

Thermal Properties

Latent Heat of Fusion, J/g 350
410
Maximum Temperature: Mechanical, °C 120
330
Melting Completion (Liquidus), °C 600
1640
Melting Onset (Solidus), °C 530
1590
Specific Heat Capacity, J/kg-K 990
550
Thermal Conductivity, W/m-K 79
8.3
Thermal Expansion, µm/m-K 27
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 62
2.7

Otherwise Unclassified Properties

Density, g/cm3 1.7
4.5
Embodied Carbon, kg CO2/kg material 23
41
Embodied Energy, MJ/kg 160
670
Embodied Water, L/kg 980
270

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
87 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 310
1380 to 3110
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
35
Strength to Weight: Axial, points 46
43 to 61
Strength to Weight: Bending, points 56
39 to 49
Thermal Diffusivity, mm2/s 47
3.4
Thermal Shock Resistance, points 17
47 to 67

Alloy Composition


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Aluminum (Al), % 5.5 to 7.2
2.5 to 3.5
Carbon (C), % 0
0 to 0.080
Copper (Cu), % 0 to 0.050
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 0.0050
0 to 0.25
Magnesium (Mg), % 90.3 to 93.9
0
Manganese (Mn), % 0.15 to 0.5
0
Nickel (Ni), % 0 to 0.0050
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.15
Palladium (Pd), % 0
0.040 to 0.080
Silicon (Si), % 0 to 0.1
0
Titanium (Ti), % 0
92.5 to 95.5
Vanadium (V), % 0
2.0 to 3.0
Zinc (Zn), % 0.4 to 1.5
0
Residuals, % 0 to 0.3
0 to 0.4