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ACI-ASTM CA15M Steel vs. EN-MC21210 Magnesium

ACI-ASTM CA15M steel belongs to the iron alloys classification, while EN-MC21210 magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 EN-MC21210 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
48
Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 20
14
Fatigue Strength, MPa 330
70
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Tensile Strength: Ultimate (UTS), MPa 690
190
Tensile Strength: Yield (Proof), MPa 510
90

Thermal Properties

Latent Heat of Fusion, J/g 270
350
Maximum Temperature: Mechanical, °C 760
100
Melting Completion (Liquidus), °C 1450
600
Melting Onset (Solidus), °C 1410
570
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 27
120
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
130

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
12
Density, g/cm3 7.8
1.6
Embodied Carbon, kg CO2/kg material 2.1
24
Embodied Energy, MJ/kg 29
160
Embodied Water, L/kg 100
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
22
Resilience: Unit (Modulus of Resilience), kJ/m3 670
92
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
72
Strength to Weight: Axial, points 25
32
Strength to Weight: Bending, points 22
44
Thermal Diffusivity, mm2/s 7.2
76
Thermal Shock Resistance, points 25
11

Alloy Composition

Aluminum (Al), % 0
1.6 to 2.6
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 11.5 to 14
0
Copper (Cu), % 0
0 to 0.010
Iron (Fe), % 82.1 to 88.4
0 to 0.0050
Magnesium (Mg), % 0
96.3 to 98.3
Manganese (Mn), % 0 to 1.0
0.1 to 0.7
Molybdenum (Mo), % 0.15 to 1.0
0
Nickel (Ni), % 0 to 1.0
0 to 0.0020
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.65
0 to 0.1
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.010