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SAE-AISI M2 Steel vs. ZK61A Magnesium

SAE-AISI M2 steel belongs to the iron alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 SAE-AISI M2 steel and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
18
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
290 to 310

Thermal Properties

Latent Heat of Fusion, J/g 260
330
Melting Completion (Liquidus), °C 1610
640
Melting Onset (Solidus), °C 1570
530
Specific Heat Capacity, J/kg-K 440
960
Thermal Conductivity, W/m-K 22
120
Thermal Expansion, µm/m-K 10
27

Otherwise Unclassified Properties

Base Metal Price, % relative 24
13
Density, g/cm3 8.4
1.9
Embodied Carbon, kg CO2/kg material 8.8
23
Embodied Energy, MJ/kg 130
160
Embodied Water, L/kg 98
940

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
62
Strength to Weight: Axial, points 25 to 71
42 to 45
Strength to Weight: Bending, points 22 to 44
50 to 53
Thermal Diffusivity, mm2/s 5.9
65
Thermal Shock Resistance, points 27 to 76
17 to 18

Alloy Composition

Carbon (C), % 0.78 to 1.1
0
Chromium (Cr), % 3.8 to 4.5
0
Copper (Cu), % 0 to 0.25
0 to 0.1
Iron (Fe), % 78.5 to 83.4
0
Magnesium (Mg), % 0
92.1 to 93.9
Manganese (Mn), % 0.15 to 0.4
0
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 0 to 0.3
0 to 0.010
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.45
0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0
Zinc (Zn), % 0
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3