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EN 1.4938 Stainless Steel vs. 201.0 Aluminum

EN 1.4938 stainless steel belongs to the iron alloys classification, while 201.0 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (7, 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 201.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 16 to 17
4.4 to 20
Fatigue Strength, MPa 390 to 520
120 to 150
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
27
Shear Strength, MPa 540 to 630
290
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
370 to 470
Tensile Strength: Yield (Proof), MPa 640 to 870
220 to 400

Thermal Properties

Latent Heat of Fusion, J/g 270
390
Maximum Temperature: Mechanical, °C 750
170
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
570
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 30
120
Thermal Expansion, µm/m-K 11
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
30 to 33
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
87 to 97

Otherwise Unclassified Properties

Base Metal Price, % relative 10
38
Density, g/cm3 7.8
3.1
Embodied Carbon, kg CO2/kg material 3.3
8.7
Embodied Energy, MJ/kg 47
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
19 to 63
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
330 to 1160
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
45
Strength to Weight: Axial, points 31 to 37
33 to 42
Strength to Weight: Bending, points 26 to 29
37 to 44
Thermal Diffusivity, mm2/s 8.1
45
Thermal Shock Resistance, points 30 to 35
19 to 25

Alloy Composition

Aluminum (Al), % 0
92.1 to 95.1
Carbon (C), % 0.080 to 0.15
0
Chromium (Cr), % 11 to 12.5
0
Copper (Cu), % 0
4.0 to 5.2
Iron (Fe), % 80.5 to 84.8
0 to 0.15
Magnesium (Mg), % 0
0.15 to 0.55
Manganese (Mn), % 0.4 to 0.9
0.2 to 0.5
Molybdenum (Mo), % 1.5 to 2.0
0
Nickel (Ni), % 2.0 to 3.0
0
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 0.1
Silver (Ag), % 0
0.4 to 1.0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0.15 to 0.35
Vanadium (V), % 0.25 to 0.4
0
Residuals, % 0
0 to 0.1