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EN-MC21320 Magnesium vs. EN 1.4857 Stainless Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while EN 1.4857 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 EN 1.4857 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 68
150
Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 7.5
6.7
Fatigue Strength, MPa 95
120
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
78
Tensile Strength: Ultimate (UTS), MPa 230
500
Tensile Strength: Yield (Proof), MPa 140
250

Thermal Properties

Latent Heat of Fusion, J/g 370
330
Maximum Temperature: Mechanical, °C 110
1100
Melting Completion (Liquidus), °C 600
1370
Melting Onset (Solidus), °C 530
1320
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 66
13
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 91
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
34
Density, g/cm3 1.6
7.9
Embodied Carbon, kg CO2/kg material 23
5.7
Embodied Energy, MJ/kg 160
81
Embodied Water, L/kg 980
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
28
Resilience: Unit (Modulus of Resilience), kJ/m3 200
150
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
18
Strength to Weight: Bending, points 50
18
Thermal Diffusivity, mm2/s 40
3.4
Thermal Shock Resistance, points 13
11

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0.3 to 0.5
Chromium (Cr), % 0
24 to 27
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
31.4 to 41.7
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.0020
33 to 36
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.5 to 1.5
1.0 to 2.5
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0