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ASTM A572 Steel vs. EN-MC21230 Magnesium

ASTM A572 steel belongs to the iron alloys classification, while EN-MC21230 magnesium belongs to the magnesium 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 ASTM A572 steel and the bottom bar is EN-MC21230 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 190
63
Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 18 to 25
10
Fatigue Strength, MPa 240 to 340
99
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
18
Shear Strength, MPa 300 to 380
130
Tensile Strength: Ultimate (UTS), MPa 470 to 620
220
Tensile Strength: Yield (Proof), MPa 330 to 510
140

Thermal Properties

Latent Heat of Fusion, J/g 250
350
Maximum Temperature: Mechanical, °C 400
120
Melting Completion (Liquidus), °C 1460
600
Melting Onset (Solidus), °C 1420
520
Specific Heat Capacity, J/kg-K 470
1000
Thermal Conductivity, W/m-K 51
72
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
12
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.3
63

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0
12
Density, g/cm3 7.8
1.7
Embodied Carbon, kg CO2/kg material 1.6
23
Embodied Energy, MJ/kg 22
160
Embodied Water, L/kg 47
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 110
19
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 690
200
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
71
Strength to Weight: Axial, points 17 to 22
36
Strength to Weight: Bending, points 17 to 21
48
Thermal Diffusivity, mm2/s 14
43
Thermal Shock Resistance, points 14 to 18
13