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EN-MC65220 Magnesium vs. ASTM A387 Grade 12 Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while ASTM A387 grade 12 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown. 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-MC65220 magnesium and the bottom bar is ASTM A387 grade 12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
140 to 160
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 2.2
25
Fatigue Strength, MPa 110
190 to 230
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 150
300 to 330
Tensile Strength: Ultimate (UTS), MPa 270
470 to 520
Tensile Strength: Yield (Proof), MPa 200
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 160
430
Melting Completion (Liquidus), °C 610
1470
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 980
470
Thermal Conductivity, W/m-K 110
44
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 80
2.8
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 27
1.6
Embodied Energy, MJ/kg 210
21

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
98 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 450
180 to 250
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 62
24
Strength to Weight: Axial, points 40
16 to 18
Strength to Weight: Bending, points 49
17 to 18
Thermal Diffusivity, mm2/s 61
12
Thermal Shock Resistance, points 17
14 to 15

Alloy Composition


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Carbon (C), % 0
0.050 to 0.17
Chromium (Cr), % 0
0.8 to 1.2
Copper (Cu), % 0.050 to 0.1
0
Iron (Fe), % 0 to 0.010
97 to 98.2
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0.4 to 0.65
Molybdenum (Mo), % 0
0.45 to 0.6
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.010
0.15 to 0.4
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.025
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0