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AM50A Magnesium vs. EN 1.4021 Stainless Steel

AM50A magnesium belongs to the magnesium alloys classification, while EN 1.4021 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 AM50A magnesium and the bottom bar is EN 1.4021 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 11
11 to 17
Fatigue Strength, MPa 70
240 to 380
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
76
Shear Strength, MPa 120
390 to 530
Tensile Strength: Ultimate (UTS), MPa 210
630 to 880
Tensile Strength: Yield (Proof), MPa 120
390 to 670

Thermal Properties

Latent Heat of Fusion, J/g 350
270
Maximum Temperature: Mechanical, °C 120
760
Melting Completion (Liquidus), °C 620
1440
Melting Onset (Solidus), °C 570
1400
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 65
30
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 88
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
7.0
Density, g/cm3 1.7
7.7
Embodied Carbon, kg CO2/kg material 23
1.9
Embodied Energy, MJ/kg 160
27
Embodied Water, L/kg 990
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
88 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 150
400 to 1160
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 71
25
Strength to Weight: Axial, points 35
23 to 31
Strength to Weight: Bending, points 47
21 to 26
Thermal Diffusivity, mm2/s 39
8.1
Thermal Shock Resistance, points 13
22 to 31

Alloy Composition

Aluminum (Al), % 4.4 to 5.4
0
Carbon (C), % 0
0.16 to 0.25
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0040
83.2 to 87.8
Magnesium (Mg), % 93.7 to 95.3
0
Manganese (Mn), % 0.26 to 0.6
0 to 1.5
Nickel (Ni), % 0 to 0.0020
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0 to 0.22
0