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EN AC-71100 Aluminum vs. S44625 Stainless Steel

EN AC-71100 aluminum belongs to the aluminum alloys classification, while S44625 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 S44625 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 1.1
22
Fatigue Strength, MPa 150
240
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 27
80
Tensile Strength: Ultimate (UTS), MPa 260
590
Tensile Strength: Yield (Proof), MPa 230
360

Thermal Properties

Latent Heat of Fusion, J/g 490
290
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 580
1440
Melting Onset (Solidus), °C 520
1400
Specific Heat Capacity, J/kg-K 860
480
Thermal Expansion, µm/m-K 22
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 97
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
14
Density, g/cm3 2.9
7.7
Embodied Carbon, kg CO2/kg material 7.4
2.8
Embodied Energy, MJ/kg 140
39
Embodied Water, L/kg 1010
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.8
110
Resilience: Unit (Modulus of Resilience), kJ/m3 360
310
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 25
21
Strength to Weight: Bending, points 31
20
Thermal Shock Resistance, points 12
19

Alloy Composition

Aluminum (Al), % 78.7 to 83.3
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0
25 to 27.5
Copper (Cu), % 0 to 0.1
0 to 0.2
Iron (Fe), % 0 to 0.3
69.4 to 74.3
Magnesium (Mg), % 0.2 to 0.5
0
Manganese (Mn), % 0 to 0.15
0 to 0.4
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 0
0 to 0.5
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 7.5 to 9.5
0 to 0.4
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 9.0 to 10.5
0
Residuals, % 0 to 0.15
0