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EN AC-51500 Aluminum vs. AISI 308 Stainless Steel

EN AC-51500 aluminum belongs to the aluminum alloys classification, while AISI 308 stainless steel belongs to the iron alloys. There are 30 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-51500 aluminum and the bottom bar is AISI 308 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
160
Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 5.6
45
Fatigue Strength, MPa 120
210
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
78
Tensile Strength: Ultimate (UTS), MPa 280
590
Tensile Strength: Yield (Proof), MPa 160
230

Thermal Properties

Latent Heat of Fusion, J/g 430
290
Maximum Temperature: Mechanical, °C 170
990
Melting Completion (Liquidus), °C 630
1420
Melting Onset (Solidus), °C 590
1380
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 120
15
Thermal Expansion, µm/m-K 23
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 88
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
17
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 9.0
3.2
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13
210
Resilience: Unit (Modulus of Resilience), kJ/m3 190
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 52
25
Strength to Weight: Axial, points 29
21
Strength to Weight: Bending, points 36
20
Thermal Diffusivity, mm2/s 49
4.1
Thermal Shock Resistance, points 13
13

Alloy Composition

Aluminum (Al), % 89.8 to 93.1
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
19 to 21
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.25
64.1 to 71
Magnesium (Mg), % 4.7 to 6.0
0
Manganese (Mn), % 0.4 to 0.8
0 to 2.0
Nickel (Ni), % 0
10 to 12
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 1.8 to 2.6
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.15
0