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EN 1.4031 Stainless Steel vs. EN AC-71100 Aluminum

EN 1.4031 stainless steel belongs to the iron alloys classification, while EN AC-71100 aluminum belongs to the aluminum alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 1.4031 stainless steel and the bottom bar is EN AC-71100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
72
Elongation at Break, % 11 to 13
1.1
Fatigue Strength, MPa 220 to 400
150
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
27
Tensile Strength: Ultimate (UTS), MPa 670 to 900
260
Tensile Strength: Yield (Proof), MPa 390 to 730
230

Thermal Properties

Latent Heat of Fusion, J/g 280
490
Maximum Temperature: Mechanical, °C 770
170
Melting Completion (Liquidus), °C 1440
580
Melting Onset (Solidus), °C 1400
520
Specific Heat Capacity, J/kg-K 480
860
Thermal Expansion, µm/m-K 11
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
32
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
97

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
9.5
Density, g/cm3 7.7
2.9
Embodied Carbon, kg CO2/kg material 1.9
7.4
Embodied Energy, MJ/kg 27
140
Embodied Water, L/kg 100
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 94
2.8
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1360
360
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 24 to 32
25
Strength to Weight: Bending, points 22 to 27
31
Thermal Shock Resistance, points 23 to 32
12

Alloy Composition

Aluminum (Al), % 0
78.7 to 83.3
Carbon (C), % 0.36 to 0.42
0
Chromium (Cr), % 12.5 to 14.5
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 83 to 87.1
0 to 0.3
Magnesium (Mg), % 0
0.2 to 0.5
Manganese (Mn), % 0 to 1.0
0 to 0.15
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
7.5 to 9.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
9.0 to 10.5
Residuals, % 0
0 to 0.15