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ACI-ASTM CA6NM Steel vs. EN-MC21210 Magnesium

ACI-ASTM CA6NM 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 CA6NM steel and the bottom bar is EN-MC21210 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
48
Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 17
14
Fatigue Strength, MPa 380
70
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Tensile Strength: Ultimate (UTS), MPa 850
190
Tensile Strength: Yield (Proof), MPa 620
90

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Maximum Temperature: Mechanical, °C 770
100
Melting Completion (Liquidus), °C 1450
600
Melting Onset (Solidus), °C 1400
570
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 25
120
Thermal Expansion, µm/m-K 10
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
24
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
130

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 7.8
1.6
Embodied Carbon, kg CO2/kg material 2.5
24
Embodied Energy, MJ/kg 34
160
Embodied Water, L/kg 110
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
22
Resilience: Unit (Modulus of Resilience), kJ/m3 1000
92
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
72
Strength to Weight: Axial, points 30
32
Strength to Weight: Bending, points 26
44
Thermal Diffusivity, mm2/s 6.7
76
Thermal Shock Resistance, points 31
11

Alloy Composition

Aluminum (Al), % 0
1.6 to 2.6
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 11.5 to 14
0
Copper (Cu), % 0
0 to 0.010
Iron (Fe), % 78.4 to 84.6
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), % 0.4 to 1.0
0
Nickel (Ni), % 3.5 to 4.5
0 to 0.0020
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.010