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EN AC-21100 Aluminum vs. EN 1.4901 Stainless Steel

EN AC-21100 aluminum belongs to the aluminum alloys classification, while EN 1.4901 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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-21100 aluminum and the bottom bar is EN 1.4901 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 6.2 to 7.3
19
Fatigue Strength, MPa 79 to 87
310
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Tensile Strength: Ultimate (UTS), MPa 340 to 350
740
Tensile Strength: Yield (Proof), MPa 210 to 240
490

Thermal Properties

Latent Heat of Fusion, J/g 390
260
Maximum Temperature: Mechanical, °C 170
650
Melting Completion (Liquidus), °C 670
1490
Melting Onset (Solidus), °C 550
1450
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 130
26
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 100
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
11
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.0
2.8
Embodied Energy, MJ/kg 150
40
Embodied Water, L/kg 1150
89

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
120
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
620
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 31 to 33
26
Strength to Weight: Bending, points 36 to 37
23
Thermal Diffusivity, mm2/s 48
6.9
Thermal Shock Resistance, points 15
23

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0 to 0.020
Boron (B), % 0
0.0010 to 0.0060
Carbon (C), % 0
0.070 to 0.13
Chromium (Cr), % 0
8.5 to 9.5
Copper (Cu), % 4.2 to 5.2
0
Iron (Fe), % 0 to 0.19
85.8 to 89.1
Manganese (Mn), % 0 to 0.55
0.3 to 0.6
Molybdenum (Mo), % 0
0.3 to 0.6
Nickel (Ni), % 0
0 to 0.4
Niobium (Nb), % 0
0.040 to 0.090
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.18
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0.15 to 0.3
0 to 0.010
Tungsten (W), % 0
1.5 to 2.0
Vanadium (V), % 0
0.15 to 0.25
Zinc (Zn), % 0 to 0.070
0
Zirconium (Zr), % 0
0 to 0.010
Residuals, % 0 to 0.1
0