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EN AC-21100 Aluminum vs. AISI 416 Stainless Steel

EN AC-21100 aluminum belongs to the aluminum alloys classification, while AISI 416 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 AISI 416 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
230 to 320
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 6.2 to 7.3
13 to 31
Fatigue Strength, MPa 79 to 87
230 to 340
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Tensile Strength: Ultimate (UTS), MPa 340 to 350
510 to 800
Tensile Strength: Yield (Proof), MPa 210 to 240
290 to 600

Thermal Properties

Latent Heat of Fusion, J/g 390
270
Maximum Temperature: Mechanical, °C 170
680
Melting Completion (Liquidus), °C 670
1530
Melting Onset (Solidus), °C 550
1480
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 130
30
Thermal Expansion, µm/m-K 23
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 100
3.3

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
1.9
Embodied Energy, MJ/kg 150
27
Embodied Water, L/kg 1150
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
98 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
220 to 940
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 31 to 33
18 to 29
Strength to Weight: Bending, points 36 to 37
18 to 25
Thermal Diffusivity, mm2/s 48
8.1
Thermal Shock Resistance, points 15
19 to 30

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 4.2 to 5.2
0
Iron (Fe), % 0 to 0.19
83.2 to 87.9
Manganese (Mn), % 0 to 0.55
0 to 1.3
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0 to 0.18
0 to 1.0
Sulfur (S), % 0
0.15 to 0.35
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0