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EN 1.4020 Stainless Steel vs. QE22A Magnesium

EN 1.4020 stainless steel belongs to the iron alloys classification, while QE22A magnesium belongs to the magnesium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (11, 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 1.4020 stainless steel and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 340
80
Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 13 to 34
2.4
Fatigue Strength, MPa 340 to 540
110
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
17
Shear Strength, MPa 510 to 680
150
Tensile Strength: Ultimate (UTS), MPa 770 to 1130
250
Tensile Strength: Yield (Proof), MPa 430 to 950
190

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Maximum Temperature: Mechanical, °C 890
250
Melting Completion (Liquidus), °C 1390
640
Melting Onset (Solidus), °C 1350
570
Specific Heat Capacity, J/kg-K 480
970
Thermal Expansion, µm/m-K 17
27

Otherwise Unclassified Properties

Density, g/cm3 7.6
2.0
Embodied Carbon, kg CO2/kg material 2.5
27
Embodied Energy, MJ/kg 37
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 220
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 2290
400
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
60
Strength to Weight: Axial, points 28 to 41
36
Strength to Weight: Bending, points 25 to 32
46
Thermal Shock Resistance, points 16 to 23
15

Alloy Composition

Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 16.5 to 19
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 62.8 to 71.8
0
Magnesium (Mg), % 0
93.1 to 95.8
Manganese (Mn), % 11 to 14
0
Nickel (Ni), % 0.5 to 2.5
0 to 0.010
Nitrogen (N), % 0.2 to 0.45
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
2.0 to 3.0
Sulfur (S), % 0 to 0.030
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3