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EN 1.4421 Stainless Steel vs. QE22A Magnesium

EN 1.4421 stainless steel belongs to the iron alloys classification, while QE22A magnesium belongs to the magnesium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (10, 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 1.4421 stainless steel and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 11 to 17
2.4
Fatigue Strength, MPa 380 to 520
110
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
17
Tensile Strength: Ultimate (UTS), MPa 880 to 1100
250
Tensile Strength: Yield (Proof), MPa 620 to 950
190

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Maximum Temperature: Mechanical, °C 870
250
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
570
Specific Heat Capacity, J/kg-K 480
970
Thermal Conductivity, W/m-K 16
110
Thermal Expansion, µm/m-K 10
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
25
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
120

Otherwise Unclassified Properties

Density, g/cm3 7.8
2.0
Embodied Carbon, kg CO2/kg material 2.6
27
Embodied Energy, MJ/kg 36
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 140
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 960 to 2270
400
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
60
Strength to Weight: Axial, points 31 to 39
36
Strength to Weight: Bending, points 26 to 30
46
Thermal Diffusivity, mm2/s 4.4
59
Thermal Shock Resistance, points 31 to 39
15

Alloy Composition

Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 15.5 to 17.5
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 74.4 to 80.5
0
Magnesium (Mg), % 0
93.1 to 95.8
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0 to 0.7
0
Nickel (Ni), % 4.0 to 5.5
0 to 0.010
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 0.8
0
Silver (Ag), % 0
2.0 to 3.0
Sulfur (S), % 0 to 0.020
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3