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EN-MC21210 Magnesium vs. ASTM A302 Alloy Steel

EN-MC21210 magnesium belongs to the magnesium alloys classification, while ASTM A302 alloy 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-MC21210 magnesium and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 48
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 14
20 to 23
Fatigue Strength, MPa 70
250 to 280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 110
370 to 390
Tensile Strength: Ultimate (UTS), MPa 190
590 to 620
Tensile Strength: Yield (Proof), MPa 90
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 350
250
Maximum Temperature: Mechanical, °C 100
410
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 570
1420
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 120
39 to 51
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 130
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
2.4 to 3.0
Density, g/cm3 1.6
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 24
1.5 to 1.6
Embodied Energy, MJ/kg 160
20 to 21
Embodied Water, L/kg 980
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 92
330 to 410
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 32
21 to 22
Strength to Weight: Bending, points 44
20 to 21
Thermal Diffusivity, mm2/s 76
10 to 14
Thermal Shock Resistance, points 11
17 to 18