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AM50A Magnesium vs. EN 1.4558 Stainless Steel

AM50A magnesium belongs to the magnesium alloys classification, while EN 1.4558 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 1.4558 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
39
Fatigue Strength, MPa 70
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
77
Shear Strength, MPa 120
350
Tensile Strength: Ultimate (UTS), MPa 210
510
Tensile Strength: Yield (Proof), MPa 120
200

Thermal Properties

Latent Heat of Fusion, J/g 350
300
Maximum Temperature: Mechanical, °C 120
1100
Melting Completion (Liquidus), °C 620
1400
Melting Onset (Solidus), °C 570
1350
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 65
12
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 88
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 23
5.5
Embodied Energy, MJ/kg 160
77
Embodied Water, L/kg 990
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
160
Resilience: Unit (Modulus of Resilience), kJ/m3 150
100
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 71
24
Strength to Weight: Axial, points 35
18
Strength to Weight: Bending, points 47
18
Thermal Diffusivity, mm2/s 39
3.1
Thermal Shock Resistance, points 13
12

Alloy Composition

Aluminum (Al), % 4.4 to 5.4
0.15 to 0.45
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
20 to 23
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0040
39.2 to 47.9
Magnesium (Mg), % 93.7 to 95.3
0
Manganese (Mn), % 0.26 to 0.6
0 to 1.0
Nickel (Ni), % 0 to 0.0020
32 to 35
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.1
0 to 0.7
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0 to 0.6
Zinc (Zn), % 0 to 0.22
0