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ACI-ASTM CK35MN Steel vs. AM50A Magnesium

ACI-ASTM CK35MN steel belongs to the iron alloys classification, while AM50A magnesium belongs to the magnesium 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 ACI-ASTM CK35MN steel and the bottom bar is AM50A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
58
Elastic (Young's, Tensile) Modulus, GPa 210
45
Elongation at Break, % 40
11
Fatigue Strength, MPa 270
70
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
17
Tensile Strength: Ultimate (UTS), MPa 650
210
Tensile Strength: Yield (Proof), MPa 310
120

Thermal Properties

Latent Heat of Fusion, J/g 310
350
Maximum Temperature: Mechanical, °C 1100
120
Melting Completion (Liquidus), °C 1460
620
Melting Onset (Solidus), °C 1410
570
Specific Heat Capacity, J/kg-K 470
1000
Thermal Conductivity, W/m-K 12
65
Thermal Expansion, µm/m-K 16
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
16
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
88

Otherwise Unclassified Properties

Base Metal Price, % relative 31
12
Density, g/cm3 8.0
1.7
Embodied Carbon, kg CO2/kg material 5.9
23
Embodied Energy, MJ/kg 81
160
Embodied Water, L/kg 210
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
19
Resilience: Unit (Modulus of Resilience), kJ/m3 240
150
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 22
35
Strength to Weight: Bending, points 21
47
Thermal Diffusivity, mm2/s 3.3
39
Thermal Shock Resistance, points 14
13

Alloy Composition

Aluminum (Al), % 0
4.4 to 5.4
Carbon (C), % 0 to 0.035
0
Chromium (Cr), % 22 to 24
0
Copper (Cu), % 0 to 0.4
0 to 0.010
Iron (Fe), % 43.4 to 51.8
0 to 0.0040
Magnesium (Mg), % 0
93.7 to 95.3
Manganese (Mn), % 0 to 2.0
0.26 to 0.6
Molybdenum (Mo), % 6.0 to 6.8
0
Nickel (Ni), % 20 to 22
0 to 0.0020
Nitrogen (N), % 0.21 to 0.32
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.020
0
Zinc (Zn), % 0
0 to 0.22