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ACI-ASTM CK35MN Steel vs. ISO-WD32250 Magnesium

ACI-ASTM CK35MN steel belongs to the iron alloys classification, while ISO-WD32250 magnesium belongs to the magnesium alloys. There are 29 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 CK35MN steel and the bottom bar is ISO-WD32250 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
45
Elongation at Break, % 40
4.5 to 8.6
Fatigue Strength, MPa 270
170 to 210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
17
Tensile Strength: Ultimate (UTS), MPa 650
310 to 330
Tensile Strength: Yield (Proof), MPa 310
240 to 290

Thermal Properties

Latent Heat of Fusion, J/g 310
340
Maximum Temperature: Mechanical, °C 1100
120
Melting Completion (Liquidus), °C 1460
600
Melting Onset (Solidus), °C 1410
550
Specific Heat Capacity, J/kg-K 470
980
Thermal Conductivity, W/m-K 12
130
Thermal Expansion, µm/m-K 16
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
25
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
130

Otherwise Unclassified Properties

Base Metal Price, % relative 31
13
Density, g/cm3 8.0
1.8
Embodied Carbon, kg CO2/kg material 5.9
24
Embodied Energy, MJ/kg 81
160
Embodied Water, L/kg 210
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
14 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 240
630 to 930
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
67
Strength to Weight: Axial, points 22
49 to 51
Strength to Weight: Bending, points 21
58 to 60
Thermal Diffusivity, mm2/s 3.3
72
Thermal Shock Resistance, points 14
19 to 20

Alloy Composition

Carbon (C), % 0 to 0.035
0
Chromium (Cr), % 22 to 24
0
Copper (Cu), % 0 to 0.4
0
Iron (Fe), % 43.4 to 51.8
0
Magnesium (Mg), % 0
94.9 to 97.1
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 6.0 to 6.8
0
Nickel (Ni), % 20 to 22
0
Nitrogen (N), % 0.21 to 0.32
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.020
0
Zinc (Zn), % 0
2.5 to 4.0
Zirconium (Zr), % 0
0.45 to 0.8
Residuals, % 0
0 to 0.3