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EN-MC21320 Magnesium vs. EN 1.4903 Stainless Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while EN 1.4903 stainless steel belongs to the iron alloys. There are 30 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 EN 1.4903 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 7.5
20 to 21
Fatigue Strength, MPa 95
320 to 330
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
75
Shear Strength, MPa 130
420
Tensile Strength: Ultimate (UTS), MPa 230
670 to 680
Tensile Strength: Yield (Proof), MPa 140
500

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Maximum Temperature: Mechanical, °C 110
650
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 530
1420
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 66
26
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 91
4.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
7.0
Density, g/cm3 1.6
7.8
Embodied Carbon, kg CO2/kg material 23
2.6
Embodied Energy, MJ/kg 160
36
Embodied Water, L/kg 980
88

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 200
650
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
24
Strength to Weight: Bending, points 50
22
Thermal Diffusivity, mm2/s 40
7.0
Thermal Shock Resistance, points 13
23

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0 to 0.040
Carbon (C), % 0
0.080 to 0.12
Chromium (Cr), % 0
8.0 to 9.5
Copper (Cu), % 0 to 0.010
0 to 0.3
Iron (Fe), % 0 to 0.0050
87.1 to 90.5
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0.3 to 0.6
Molybdenum (Mo), % 0
0.85 to 1.1
Nickel (Ni), % 0 to 0.0020
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0.5 to 1.5
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Vanadium (V), % 0
0.18 to 0.25
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0