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EN AC-71100 Aluminum vs. EN 1.4104 Stainless Steel

EN AC-71100 aluminum belongs to the aluminum alloys classification, while EN 1.4104 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 1.4104 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 1.1
11 to 23
Fatigue Strength, MPa 150
230 to 310
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 260
630 to 750
Tensile Strength: Yield (Proof), MPa 230
350 to 560

Thermal Properties

Latent Heat of Fusion, J/g 490
280
Maximum Temperature: Mechanical, °C 170
860
Melting Completion (Liquidus), °C 580
1440
Melting Onset (Solidus), °C 520
1390
Specific Heat Capacity, J/kg-K 860
480
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 97
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
8.5
Density, g/cm3 2.9
7.7
Embodied Carbon, kg CO2/kg material 7.4
2.2
Embodied Energy, MJ/kg 140
30
Embodied Water, L/kg 1010
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.8
77 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 360
310 to 800
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 25
23 to 27
Strength to Weight: Bending, points 31
21 to 24
Thermal Shock Resistance, points 12
22 to 27

Alloy Composition

Aluminum (Al), % 78.7 to 83.3
0
Carbon (C), % 0
0.1 to 0.17
Chromium (Cr), % 0
15.5 to 17.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.3
78.8 to 84.1
Magnesium (Mg), % 0.2 to 0.5
0
Manganese (Mn), % 0 to 0.15
0 to 1.5
Molybdenum (Mo), % 0
0.2 to 0.6
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 7.5 to 9.5
0 to 1.0
Sulfur (S), % 0
0.15 to 0.35
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 9.0 to 10.5
0
Residuals, % 0 to 0.15
0