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EN-MC95310 Magnesium vs. ASTM A372 Grade J Steel

EN-MC95310 magnesium belongs to the magnesium alloys classification, while ASTM A372 grade J 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-MC95310 magnesium and the bottom bar is ASTM A372 grade J steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 85
200 to 310
Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 2.2
17 to 22
Fatigue Strength, MPa 110
310 to 570
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 160
410 to 630
Tensile Strength: Ultimate (UTS), MPa 280
650 to 1020
Tensile Strength: Yield (Proof), MPa 190
430 to 850

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 170
420
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 540
1420
Specific Heat Capacity, J/kg-K 960
470
Thermal Conductivity, W/m-K 51
44
Thermal Expansion, µm/m-K 25
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 50
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 34
2.4
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 29
1.5
Embodied Energy, MJ/kg 260
20
Embodied Water, L/kg 900
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
130 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 420
500 to 1930
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 61
24
Strength to Weight: Axial, points 40
23 to 36
Strength to Weight: Bending, points 49
21 to 29
Thermal Diffusivity, mm2/s 28
12
Thermal Shock Resistance, points 18
19 to 30

Alloy Composition


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Carbon (C), % 0
0.35 to 0.5
Chromium (Cr), % 0
0.8 to 1.2
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.010
96.7 to 97.8
Lithium (Li), % 0 to 0.2
0
Magnesium (Mg), % 88.9 to 93.4
0
Manganese (Mn), % 0 to 0.15
0.75 to 1.1
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.010
0.15 to 0.35
Sulfur (S), % 0
0 to 0.010
Unspecified Rare Earths, % 1.5 to 4.0
0
Yttrium (Y), % 4.8 to 5.5
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0