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ASTM Grade HE Steel vs. EZ33A Magnesium

ASTM grade HE steel belongs to the iron alloys classification, while EZ33A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 ASTM grade HE steel and the bottom bar is EZ33A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
55
Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 10
2.6
Fatigue Strength, MPa 160
70
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
17
Tensile Strength: Ultimate (UTS), MPa 670
150
Tensile Strength: Yield (Proof), MPa 310
100

Thermal Properties

Latent Heat of Fusion, J/g 310
330
Maximum Temperature: Mechanical, °C 1100
250
Melting Completion (Liquidus), °C 1400
640
Melting Onset (Solidus), °C 1360
570
Specific Heat Capacity, J/kg-K 490
970
Thermal Conductivity, W/m-K 14
100
Thermal Expansion, µm/m-K 17
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
24
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
110

Otherwise Unclassified Properties

Base Metal Price, % relative 19
25
Density, g/cm3 7.7
1.9
Embodied Carbon, kg CO2/kg material 3.5
25
Embodied Energy, MJ/kg 50
190
Embodied Water, L/kg 190
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 56
3.6
Resilience: Unit (Modulus of Resilience), kJ/m3 240
120
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
61
Strength to Weight: Axial, points 24
22
Strength to Weight: Bending, points 22
33
Thermal Diffusivity, mm2/s 3.6
54
Thermal Shock Resistance, points 14
9.2

Alloy Composition

Carbon (C), % 0.2 to 0.5
0
Chromium (Cr), % 26 to 30
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 53.9 to 65.8
0
Magnesium (Mg), % 0
91.5 to 95
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 8.0 to 11
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Unspecified Rare Earths, % 0
2.5 to 4.0
Zinc (Zn), % 0
2.0 to 3.1
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3