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EN-MC35110 Magnesium vs. ACI-ASTM CN7M Steel

EN-MC35110 magnesium belongs to the magnesium alloys classification, while ACI-ASTM CN7M steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 EN-MC35110 magnesium and the bottom bar is ACI-ASTM CN7M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
140
Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 3.1
44
Fatigue Strength, MPa 110
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Tensile Strength: Ultimate (UTS), MPa 230
480
Tensile Strength: Yield (Proof), MPa 150
200

Thermal Properties

Latent Heat of Fusion, J/g 330
310
Maximum Temperature: Mechanical, °C 140
1100
Melting Completion (Liquidus), °C 600
1410
Melting Onset (Solidus), °C 520
1450
Specific Heat Capacity, J/kg-K 970
470
Thermal Conductivity, W/m-K 110
21
Thermal Expansion, µm/m-K 26
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
1.6
Electrical Conductivity: Equal Weight (Specific), % IACS 130
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 18
32
Density, g/cm3 1.9
8.1
Embodied Carbon, kg CO2/kg material 24
5.6
Embodied Energy, MJ/kg 170
78
Embodied Water, L/kg 940
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.3
170
Resilience: Unit (Modulus of Resilience), kJ/m3 260
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
24
Strength to Weight: Axial, points 34
17
Strength to Weight: Bending, points 44
17
Thermal Diffusivity, mm2/s 61
5.6
Thermal Shock Resistance, points 14
12

Alloy Composition


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Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0
19 to 22
Copper (Cu), % 0 to 0.030
3.0 to 4.0
Iron (Fe), % 0 to 0.010
37.4 to 48.5
Magnesium (Mg), % 92 to 95.4
0
Manganese (Mn), % 0 to 0.15
0 to 1.5
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0 to 0.0050
27.5 to 30.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.010
0 to 1.5
Sulfur (S), % 0
0 to 0.040
Unspecified Rare Earths, % 0.75 to 1.8
0
Zinc (Zn), % 3.5 to 5.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0