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238.0 Aluminum vs. EN 1.4031 Stainless Steel

238.0 aluminum belongs to the aluminum alloys classification, while EN 1.4031 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 238.0 aluminum and the bottom bar is EN 1.4031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
190
Elongation at Break, % 1.5
11 to 13
Fatigue Strength, MPa 110
220 to 400
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
76
Tensile Strength: Ultimate (UTS), MPa 210
670 to 900
Tensile Strength: Yield (Proof), MPa 170
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 430
280
Maximum Temperature: Mechanical, °C 170
770
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 510
1400
Specific Heat Capacity, J/kg-K 840
480
Thermal Conductivity, W/m-K 100
30
Thermal Expansion, µm/m-K 21
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 67
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
7.0
Density, g/cm3 3.4
7.7
Embodied Carbon, kg CO2/kg material 7.4
1.9
Embodied Energy, MJ/kg 140
27
Embodied Water, L/kg 1040
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 180
380 to 1360
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 42
25
Strength to Weight: Axial, points 17
24 to 32
Strength to Weight: Bending, points 23
22 to 27
Thermal Diffusivity, mm2/s 37
8.1
Thermal Shock Resistance, points 9.1
23 to 32

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0.36 to 0.42
Chromium (Cr), % 0
12.5 to 14.5
Copper (Cu), % 9.5 to 10.5
0
Iron (Fe), % 1.0 to 1.5
83 to 87.1
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0 to 1.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 3.6 to 4.4
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 1.0 to 1.5
0