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EN-MC65120 Magnesium vs. ASTM A302 Alloy Steel

EN-MC65120 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-MC65120 magnesium and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 55
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 3.1
20 to 23
Fatigue Strength, MPa 80
250 to 280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 92
370 to 390
Tensile Strength: Ultimate (UTS), MPa 160
590 to 620
Tensile Strength: Yield (Proof), MPa 110
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 180
410
Melting Completion (Liquidus), °C 590
1460
Melting Onset (Solidus), °C 520
1420
Specific Heat Capacity, J/kg-K 970
470
Thermal Conductivity, W/m-K 100
39 to 51
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 25
2.4 to 3.0
Density, g/cm3 1.9
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 25
1.5 to 1.6
Embodied Energy, MJ/kg 190
20 to 21
Embodied Water, L/kg 930
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 140
330 to 410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 62
24
Strength to Weight: Axial, points 23
21 to 22
Strength to Weight: Bending, points 34
20 to 21
Thermal Diffusivity, mm2/s 56
10 to 14
Thermal Shock Resistance, points 9.8
17 to 18