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Grade 31 Titanium vs. M1A Magnesium

Grade 31 titanium belongs to the titanium alloys classification, while M1A magnesium belongs to the magnesium alloys. There are 29 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 31 titanium and the bottom bar is M1A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
45
Elongation at Break, % 20
5.5
Fatigue Strength, MPa 300
88
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
18
Shear Strength, MPa 320
120
Tensile Strength: Ultimate (UTS), MPa 510
230
Tensile Strength: Yield (Proof), MPa 450
130

Thermal Properties

Latent Heat of Fusion, J/g 420
350
Maximum Temperature: Mechanical, °C 320
95
Melting Completion (Liquidus), °C 1660
610
Melting Onset (Solidus), °C 1610
580
Specific Heat Capacity, J/kg-K 540
990
Thermal Conductivity, W/m-K 21
150
Thermal Expansion, µm/m-K 8.7
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
35
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
190

Otherwise Unclassified Properties

Density, g/cm3 4.5
1.7
Embodied Carbon, kg CO2/kg material 36
24
Embodied Energy, MJ/kg 600
160
Embodied Water, L/kg 230
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
11
Resilience: Unit (Modulus of Resilience), kJ/m3 940
180
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
71
Strength to Weight: Axial, points 32
38
Strength to Weight: Bending, points 32
49
Thermal Diffusivity, mm2/s 8.5
88
Thermal Shock Resistance, points 39
13

Alloy Composition

Calcium (Ca), % 0
0 to 0.3
Carbon (C), % 0 to 0.080
0
Cobalt (Co), % 0.2 to 0.8
0
Copper (Cu), % 0
0 to 0.050
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
0
Magnesium (Mg), % 0
97.2 to 98.8
Manganese (Mn), % 0
1.2 to 2.0
Nickel (Ni), % 0
0 to 0.010
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.35
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 0.1
Titanium (Ti), % 97.9 to 99.76
0
Residuals, % 0
0 to 0.3