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ZK61A Magnesium vs. SAE-AISI M1 Steel

ZK61A magnesium belongs to the magnesium alloys classification, while SAE-AISI M1 steel belongs to the iron 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 ZK61A magnesium and the bottom bar is SAE-AISI M1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
77
Tensile Strength: Ultimate (UTS), MPa 290 to 310
730 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 330
270
Melting Completion (Liquidus), °C 640
1560
Melting Onset (Solidus), °C 530
1510
Specific Heat Capacity, J/kg-K 960
450
Thermal Conductivity, W/m-K 120
29
Thermal Expansion, µm/m-K 27
12

Otherwise Unclassified Properties

Base Metal Price, % relative 13
18
Density, g/cm3 1.9
8.1
Embodied Carbon, kg CO2/kg material 23
7.0
Embodied Energy, MJ/kg 160
99
Embodied Water, L/kg 940
98

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 62
24
Strength to Weight: Axial, points 42 to 45
25 to 73
Strength to Weight: Bending, points 50 to 53
22 to 45
Thermal Diffusivity, mm2/s 65
8.0
Thermal Shock Resistance, points 17 to 18
23 to 66

Alloy Composition

Carbon (C), % 0
0.78 to 0.88
Chromium (Cr), % 0
3.5 to 4.0
Copper (Cu), % 0 to 0.1
0 to 0.25
Iron (Fe), % 0
81 to 84.8
Magnesium (Mg), % 92.1 to 93.9
0
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0
8.2 to 9.2
Nickel (Ni), % 0 to 0.010
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 0.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.0 to 1.4
Zinc (Zn), % 5.5 to 6.5
0
Zirconium (Zr), % 0.6 to 1.0
0
Residuals, % 0 to 0.3
0