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AM50A Magnesium vs. ACI-ASTM CK3MCuN Steel

AM50A magnesium belongs to the magnesium alloys classification, while ACI-ASTM CK3MCuN 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 AM50A magnesium and the bottom bar is ACI-ASTM CK3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 58
180
Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
39
Fatigue Strength, MPa 70
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
80
Tensile Strength: Ultimate (UTS), MPa 210
620
Tensile Strength: Yield (Proof), MPa 120
290

Thermal Properties

Latent Heat of Fusion, J/g 350
300
Maximum Temperature: Mechanical, °C 120
1090
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 570
1350
Specific Heat Capacity, J/kg-K 1000
460
Thermal Conductivity, W/m-K 65
12
Thermal Expansion, µm/m-K 26
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 12
29
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 23
5.6
Embodied Energy, MJ/kg 160
76
Embodied Water, L/kg 990
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
200
Resilience: Unit (Modulus of Resilience), kJ/m3 150
210
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 71
24
Strength to Weight: Axial, points 35
21
Strength to Weight: Bending, points 47
20
Thermal Diffusivity, mm2/s 39
3.2
Thermal Shock Resistance, points 13
14

Alloy Composition

Aluminum (Al), % 4.4 to 5.4
0
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0
19.5 to 20.5
Copper (Cu), % 0 to 0.010
0.5 to 1.0
Iron (Fe), % 0 to 0.0040
49.5 to 56.3
Magnesium (Mg), % 93.7 to 95.3
0
Manganese (Mn), % 0.26 to 0.6
0 to 1.2
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0 to 0.0020
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 0 to 0.22
0