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EN AC-42100 Aluminum vs. AISI 308L Stainless Steel

EN AC-42100 aluminum belongs to the aluminum alloys classification, while AISI 308L stainless steel belongs to the iron alloys. There are 30 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-42100 aluminum and the bottom bar is AISI 308L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91
170
Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 3.4 to 9.0
34
Fatigue Strength, MPa 76 to 82
180
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
78
Tensile Strength: Ultimate (UTS), MPa 280 to 290
580
Tensile Strength: Yield (Proof), MPa 210 to 230
230

Thermal Properties

Latent Heat of Fusion, J/g 500
290
Maximum Temperature: Mechanical, °C 170
1010
Melting Completion (Liquidus), °C 610
1420
Melting Onset (Solidus), °C 600
1380
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 22
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
16
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 8.0
3.2
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1110
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1 to 23
160
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 370
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 30 to 31
21
Strength to Weight: Bending, points 37 to 38
20
Thermal Diffusivity, mm2/s 66
4.1
Thermal Shock Resistance, points 13
13

Alloy Composition

Aluminum (Al), % 91.3 to 93.3
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
19.5 to 22
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.19
63.8 to 70.5
Magnesium (Mg), % 0.25 to 0.45
0
Manganese (Mn), % 0 to 0.1
1.0 to 2.5
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 6.5 to 7.5
0.25 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0