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EN AC-21100 Aluminum vs. EN 1.4469 Stainless Steel

EN AC-21100 aluminum belongs to the aluminum alloys classification, while EN 1.4469 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 1.4469 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 6.2 to 7.3
25
Fatigue Strength, MPa 79 to 87
380
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 340 to 350
740
Tensile Strength: Yield (Proof), MPa 210 to 240
550

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 670
1450
Melting Onset (Solidus), °C 550
1400
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 130
17
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 100
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
21
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.0
4.1
Embodied Energy, MJ/kg 150
57
Embodied Water, L/kg 1150
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
170
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
730
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 31 to 33
26
Strength to Weight: Bending, points 36 to 37
23
Thermal Diffusivity, mm2/s 48
4.6
Thermal Shock Resistance, points 15
20

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
25 to 27
Copper (Cu), % 4.2 to 5.2
0 to 1.3
Iron (Fe), % 0 to 0.19
56.4 to 65.9
Manganese (Mn), % 0 to 0.55
0 to 1.0
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0
0.12 to 0.22
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.18
0 to 1.0
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0