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ASTM B817 Type I vs. EQ21A Magnesium

ASTM B817 type I belongs to the titanium alloys classification, while EQ21A magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, 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 ASTM B817 type I and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
44
Elongation at Break, % 4.0 to 13
2.4
Fatigue Strength, MPa 360 to 520
110
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
17
Tensile Strength: Ultimate (UTS), MPa 770 to 960
250
Tensile Strength: Yield (Proof), MPa 700 to 860
190

Thermal Properties

Latent Heat of Fusion, J/g 410
340
Maximum Temperature: Mechanical, °C 340
160
Melting Completion (Liquidus), °C 1600
640
Melting Onset (Solidus), °C 1550
560
Specific Heat Capacity, J/kg-K 560
980
Thermal Conductivity, W/m-K 7.1
110
Thermal Expansion, µm/m-K 9.6
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.0
25
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
120

Otherwise Unclassified Properties

Base Metal Price, % relative 36
80
Density, g/cm3 4.4
1.9
Embodied Carbon, kg CO2/kg material 38
27
Embodied Energy, MJ/kg 610
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30 to 120
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 2310 to 3540
410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
63
Strength to Weight: Axial, points 48 to 60
37
Strength to Weight: Bending, points 42 to 49
47
Thermal Diffusivity, mm2/s 2.9
62
Thermal Shock Resistance, points 54 to 68
15

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.1
0
Chlorine (Cl), % 0 to 0.2
0
Copper (Cu), % 0
0.050 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.4
0
Magnesium (Mg), % 0
93.9 to 96.8
Nickel (Ni), % 0
0 to 0.010
Nitrogen (N), % 0 to 0.040
0
Oxygen (O), % 0 to 0.3
0
Silicon (Si), % 0 to 0.1
0
Silver (Ag), % 0
1.3 to 1.7
Sodium (Na), % 0 to 0.2
0
Titanium (Ti), % 87 to 91
0
Unspecified Rare Earths, % 0
1.5 to 3.0
Vanadium (V), % 3.5 to 4.5
0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3