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EN-MC35110 Magnesium vs. S31655 Stainless Steel

EN-MC35110 magnesium belongs to the magnesium alloys classification, while S31655 stainless steel belongs to the iron alloys. There are 31 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-MC35110 magnesium and the bottom bar is S31655 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
210
Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 3.1
39
Fatigue Strength, MPa 110
300
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
78
Shear Strength, MPa 130
490
Tensile Strength: Ultimate (UTS), MPa 230
710
Tensile Strength: Yield (Proof), MPa 150
350

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Maximum Temperature: Mechanical, °C 140
1010
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 520
1380
Specific Heat Capacity, J/kg-K 970
480
Thermal Conductivity, W/m-K 110
15
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 18
17
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 24
3.3
Embodied Energy, MJ/kg 170
46
Embodied Water, L/kg 940
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.3
230
Resilience: Unit (Modulus of Resilience), kJ/m3 260
310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
25
Strength to Weight: Axial, points 34
25
Strength to Weight: Bending, points 44
23
Thermal Diffusivity, mm2/s 61
4.0
Thermal Shock Resistance, points 14
16

Alloy Composition


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Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
19.5 to 21.5
Copper (Cu), % 0 to 0.030
0 to 1.0
Iron (Fe), % 0 to 0.010
63.2 to 71.9
Magnesium (Mg), % 92 to 95.4
0
Manganese (Mn), % 0 to 0.15
0 to 2.0
Molybdenum (Mo), % 0
0.5 to 1.5
Nickel (Ni), % 0 to 0.0050
8.0 to 9.5
Nitrogen (N), % 0
0.14 to 0.25
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.010
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Unspecified Rare Earths, % 0.75 to 1.8
0
Zinc (Zn), % 3.5 to 5.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0