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EN AC-21100 Aluminum vs. EN 1.4029 Stainless Steel

EN AC-21100 aluminum belongs to the aluminum alloys classification, while EN 1.4029 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 1.4029 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 6.2 to 7.3
10 to 20
Fatigue Strength, MPa 79 to 87
270 to 400
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Tensile Strength: Ultimate (UTS), MPa 340 to 350
700 to 930
Tensile Strength: Yield (Proof), MPa 210 to 240
410 to 740

Thermal Properties

Latent Heat of Fusion, J/g 390
270
Maximum Temperature: Mechanical, °C 170
750
Melting Completion (Liquidus), °C 670
1440
Melting Onset (Solidus), °C 550
1400
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 130
30
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 100
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 11
7.0
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.0
2.0
Embodied Energy, MJ/kg 150
28
Embodied Water, L/kg 1150
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
89 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
440 to 1410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 31 to 33
25 to 33
Strength to Weight: Bending, points 36 to 37
23 to 27
Thermal Diffusivity, mm2/s 48
8.1
Thermal Shock Resistance, points 15
26 to 34

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
0.25 to 0.32
Chromium (Cr), % 0
12 to 13.5
Copper (Cu), % 4.2 to 5.2
0
Iron (Fe), % 0 to 0.19
82.8 to 87.6
Manganese (Mn), % 0 to 0.55
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.6
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.18
0 to 1.0
Sulfur (S), % 0
0.15 to 0.25
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0