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EN 1.4938 Stainless Steel vs. EZ33A Magnesium

EN 1.4938 stainless steel belongs to the iron alloys classification, while EZ33A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 EZ33A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 16 to 17
2.6
Fatigue Strength, MPa 390 to 520
70
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Shear Strength, MPa 540 to 630
140
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
150
Tensile Strength: Yield (Proof), MPa 640 to 870
100

Thermal Properties

Latent Heat of Fusion, J/g 270
330
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
100
Thermal Expansion, µm/m-K 11
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
24
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
110

Otherwise Unclassified Properties

Base Metal Price, % relative 10
25
Density, g/cm3 7.8
1.9
Embodied Carbon, kg CO2/kg material 3.3
25
Embodied Energy, MJ/kg 47
190
Embodied Water, L/kg 110
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
3.6
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
120
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
61
Strength to Weight: Axial, points 31 to 37
22
Strength to Weight: Bending, points 26 to 29
33
Thermal Diffusivity, mm2/s 8.1
54
Thermal Shock Resistance, points 30 to 35
9.2

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
91.5 to 95
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
Sulfur (S), % 0 to 0.015
0
Unspecified Rare Earths, % 0
2.5 to 4.0
Vanadium (V), % 0.25 to 0.4
0
Zinc (Zn), % 0
2.0 to 3.1
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3