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ACI-ASTM CA15M Steel vs. EZ33A Magnesium

ACI-ASTM CA15M 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 (6, 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 ACI-ASTM CA15M steel and the bottom bar is EZ33A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
55
Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 20
2.6
Fatigue Strength, MPa 330
70
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Tensile Strength: Ultimate (UTS), MPa 690
150
Tensile Strength: Yield (Proof), MPa 510
100

Thermal Properties

Latent Heat of Fusion, J/g 270
330
Maximum Temperature: Mechanical, °C 760
250
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1410
570
Specific Heat Capacity, J/kg-K 480
970
Thermal Conductivity, W/m-K 27
100
Thermal Expansion, µm/m-K 10
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
24
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
110

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
25
Density, g/cm3 7.8
1.9
Embodied Carbon, kg CO2/kg material 2.1
25
Embodied Energy, MJ/kg 29
190
Embodied Water, L/kg 100
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
3.6
Resilience: Unit (Modulus of Resilience), kJ/m3 670
120
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
61
Strength to Weight: Axial, points 25
22
Strength to Weight: Bending, points 22
33
Thermal Diffusivity, mm2/s 7.2
54
Thermal Shock Resistance, points 25
9.2

Alloy Composition

Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 11.5 to 14
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 82.1 to 88.4
0
Magnesium (Mg), % 0
91.5 to 95
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0.15 to 1.0
0
Nickel (Ni), % 0 to 1.0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.65
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