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EN-MC21320 Magnesium vs. S35125 Stainless Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while S35125 stainless 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 EN-MC21320 magnesium and the bottom bar is S35125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 7.5
39
Fatigue Strength, MPa 95
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
78
Shear Strength, MPa 130
370
Tensile Strength: Ultimate (UTS), MPa 230
540
Tensile Strength: Yield (Proof), MPa 140
230

Thermal Properties

Latent Heat of Fusion, J/g 370
300
Maximum Temperature: Mechanical, °C 110
1100
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 530
1380
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 66
12
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 91
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
36
Density, g/cm3 1.6
8.1
Embodied Carbon, kg CO2/kg material 23
6.4
Embodied Energy, MJ/kg 160
89
Embodied Water, L/kg 980
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
170
Resilience: Unit (Modulus of Resilience), kJ/m3 200
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 38
19
Strength to Weight: Bending, points 50
18
Thermal Diffusivity, mm2/s 40
3.1
Thermal Shock Resistance, points 13
12

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
20 to 23
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
36.2 to 45.8
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
1.0 to 1.5
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0 to 0.0020
31 to 35
Niobium (Nb), % 0
0.25 to 0.6
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0.5 to 1.5
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0