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Grade 38 Titanium vs. ZK61A Magnesium

Grade 38 titanium belongs to the titanium alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 38 titanium and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
46
Elongation at Break, % 11
5.8 to 7.1
Fatigue Strength, MPa 530
120 to 140
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
18
Shear Strength, MPa 600
170 to 180
Tensile Strength: Ultimate (UTS), MPa 1000
290 to 310
Tensile Strength: Yield (Proof), MPa 910
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 410
330
Maximum Temperature: Mechanical, °C 330
120
Melting Completion (Liquidus), °C 1620
640
Melting Onset (Solidus), °C 1570
530
Specific Heat Capacity, J/kg-K 550
960
Thermal Conductivity, W/m-K 8.0
120
Thermal Expansion, µm/m-K 9.3
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.2
29
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
130

Otherwise Unclassified Properties

Base Metal Price, % relative 36
13
Density, g/cm3 4.5
1.9
Embodied Carbon, kg CO2/kg material 35
23
Embodied Energy, MJ/kg 560
160
Embodied Water, L/kg 160
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
370 to 420
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
62
Strength to Weight: Axial, points 62
42 to 45
Strength to Weight: Bending, points 49
50 to 53
Thermal Diffusivity, mm2/s 3.2
65
Thermal Shock Resistance, points 72
17 to 18

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
0
Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 1.2 to 1.8
0
Magnesium (Mg), % 0
92.1 to 93.9
Nickel (Ni), % 0
0 to 0.010
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0.2 to 0.3
0
Titanium (Ti), % 89.9 to 93.1
0
Vanadium (V), % 2.0 to 3.0
0
Zinc (Zn), % 0
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3