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EN 1.4938 Stainless Steel vs. QE22A Magnesium

EN 1.4938 stainless steel belongs to the iron alloys classification, while QE22A magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (8, 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 1.4938 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, % 16 to 17
2.4
Fatigue Strength, MPa 390 to 520
110
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Shear Strength, MPa 540 to 630
150
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
250
Tensile Strength: Yield (Proof), MPa 640 to 870
190

Thermal Properties

Latent Heat of Fusion, J/g 270
340
Maximum Temperature: Mechanical, °C 750
250
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
570
Specific Heat Capacity, J/kg-K 470
970
Thermal Conductivity, W/m-K 30
110
Thermal Expansion, µm/m-K 11
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
25
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
120

Otherwise Unclassified Properties

Density, g/cm3 7.8
2.0
Embodied Carbon, kg CO2/kg material 3.3
27
Embodied Energy, MJ/kg 47
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
400
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
60
Strength to Weight: Axial, points 31 to 37
36
Strength to Weight: Bending, points 26 to 29
46
Thermal Diffusivity, mm2/s 8.1
59
Thermal Shock Resistance, points 30 to 35
15

Alloy Composition

Carbon (C), % 0.080 to 0.15
0
Chromium (Cr), % 11 to 12.5
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 80.5 to 84.8
0
Magnesium (Mg), % 0
93.1 to 95.8
Manganese (Mn), % 0.4 to 0.9
0
Molybdenum (Mo), % 1.5 to 2.0
0
Nickel (Ni), % 2.0 to 3.0
0 to 0.010
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0
Silver (Ag), % 0
2.0 to 3.0
Sulfur (S), % 0 to 0.015
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Vanadium (V), % 0.25 to 0.4
0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3