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EN-MC21230 Magnesium vs. ASTM A202 Steel

EN-MC21230 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-MC21230 magnesium and the bottom bar is ASTM A202 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 10
17 to 18
Fatigue Strength, MPa 99
240
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
73
Shear Strength, MPa 130
360 to 410
Tensile Strength: Ultimate (UTS), MPa 220
590 to 670
Tensile Strength: Yield (Proof), MPa 140
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 520
1410
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 72
52
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 63
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 19
93 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 200
330 to 350
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 71
24
Strength to Weight: Axial, points 36
21 to 24
Strength to Weight: Bending, points 48
20 to 22
Thermal Diffusivity, mm2/s 43
14
Thermal Shock Resistance, points 13
17 to 20