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EN AC-71100 Aluminum vs. EN 1.4621 Stainless Steel

EN AC-71100 aluminum belongs to the aluminum alloys classification, while EN 1.4621 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 1.4621 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 1.1
25
Fatigue Strength, MPa 150
190
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 27
78
Tensile Strength: Ultimate (UTS), MPa 260
500
Tensile Strength: Yield (Proof), MPa 230
270

Thermal Properties

Latent Heat of Fusion, J/g 490
290
Maximum Temperature: Mechanical, °C 170
970
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
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 97
3.1

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
41
Embodied Water, L/kg 1010
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.8
110
Resilience: Unit (Modulus of Resilience), kJ/m3 360
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 25
18
Strength to Weight: Bending, points 31
18
Thermal Shock Resistance, points 12
17

Alloy Composition

Aluminum (Al), % 78.7 to 83.3
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
20 to 21.5
Copper (Cu), % 0 to 0.1
0.1 to 1.0
Iron (Fe), % 0 to 0.3
74.4 to 79.7
Magnesium (Mg), % 0.2 to 0.5
0
Manganese (Mn), % 0 to 0.15
0 to 1.0
Niobium (Nb), % 0
0.2 to 1.0
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 7.5 to 9.5
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 9.0 to 10.5
0
Residuals, % 0 to 0.15
0