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EN-MC21220 Magnesium vs. ASTM A202 Steel

EN-MC21220 magnesium belongs to the magnesium alloys classification, while ASTM A202 steel belongs to the iron alloys. 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-MC21220 magnesium and the bottom bar is ASTM A202 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 58
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 11
17 to 18
Fatigue Strength, MPa 89
240
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 120
360 to 410
Tensile Strength: Ultimate (UTS), MPa 210
590 to 670
Tensile Strength: Yield (Proof), MPa 120
350 to 360

Thermal Properties

Latent Heat of Fusion, J/g 350
260
Maximum Temperature: Mechanical, °C 120
410
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 540
1410
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 65
52
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 87
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
2.1
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
1.4
Embodied Energy, MJ/kg 160
19
Embodied Water, L/kg 990
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
93 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 160
330 to 350
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 71
24
Strength to Weight: Axial, points 34
21 to 24
Strength to Weight: Bending, points 46
20 to 22
Thermal Diffusivity, mm2/s 39
14
Thermal Shock Resistance, points 12
17 to 20