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EN AC-71100 Aluminum vs. EN 1.4938 Stainless Steel

EN AC-71100 aluminum belongs to the aluminum alloys classification, while EN 1.4938 stainless steel belongs to the iron 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 AC-71100 aluminum and the bottom bar is EN 1.4938 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 1.1
16 to 17
Fatigue Strength, MPa 150
390 to 520
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 27
76
Tensile Strength: Ultimate (UTS), MPa 260
870 to 1030
Tensile Strength: Yield (Proof), MPa 230
640 to 870

Thermal Properties

Latent Heat of Fusion, J/g 490
270
Maximum Temperature: Mechanical, °C 170
750
Melting Completion (Liquidus), °C 580
1460
Melting Onset (Solidus), °C 520
1420
Specific Heat Capacity, J/kg-K 860
470
Thermal Expansion, µm/m-K 22
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 97
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 7.4
3.3
Embodied Energy, MJ/kg 140
47
Embodied Water, L/kg 1010
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.8
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 360
1050 to 1920
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 25
31 to 37
Strength to Weight: Bending, points 31
26 to 29
Thermal Shock Resistance, points 12
30 to 35

Alloy Composition

Aluminum (Al), % 78.7 to 83.3
0
Carbon (C), % 0
0.080 to 0.15
Chromium (Cr), % 0
11 to 12.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.3
80.5 to 84.8
Magnesium (Mg), % 0.2 to 0.5
0
Manganese (Mn), % 0 to 0.15
0.4 to 0.9
Molybdenum (Mo), % 0
1.5 to 2.0
Nickel (Ni), % 0
2.0 to 3.0
Nitrogen (N), % 0
0.020 to 0.040
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 7.5 to 9.5
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.15
0
Vanadium (V), % 0
0.25 to 0.4
Zinc (Zn), % 9.0 to 10.5
0
Residuals, % 0 to 0.15
0