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EN-MC21320 Magnesium vs. S39274 Stainless Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while S39274 stainless steel belongs to the iron alloys. There are 31 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 EN-MC21320 magnesium and the bottom bar is S39274 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 68
270
Elastic (Young's, Tensile) Modulus, GPa 45
210
Elongation at Break, % 7.5
17
Fatigue Strength, MPa 95
380
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 18
81
Shear Strength, MPa 130
560
Tensile Strength: Ultimate (UTS), MPa 230
900
Tensile Strength: Yield (Proof), MPa 140
620

Thermal Properties

Latent Heat of Fusion, J/g 370
300
Maximum Temperature: Mechanical, °C 110
1100
Melting Completion (Liquidus), °C 600
1480
Melting Onset (Solidus), °C 530
1430
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 66
16
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 91
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
24
Density, g/cm3 1.6
8.0
Embodied Carbon, kg CO2/kg material 23
4.3
Embodied Energy, MJ/kg 160
60
Embodied Water, L/kg 980
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
140
Resilience: Unit (Modulus of Resilience), kJ/m3 200
940
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
32
Strength to Weight: Bending, points 50
26
Thermal Diffusivity, mm2/s 40
4.2
Thermal Shock Resistance, points 13
25

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
24 to 26
Copper (Cu), % 0 to 0.010
0.2 to 0.8
Iron (Fe), % 0 to 0.0050
57 to 65.6
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0 to 1.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0 to 0.0020
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.5 to 1.5
0 to 0.8
Sulfur (S), % 0
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0