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AISI 308 Stainless Steel vs. EN AC-45000 Aluminum

AISI 308 stainless steel belongs to the iron alloys classification, while EN AC-45000 aluminum belongs to the aluminum 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 AISI 308 stainless steel and the bottom bar is EN AC-45000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
77
Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 45
1.1
Fatigue Strength, MPa 210
75
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
27
Tensile Strength: Ultimate (UTS), MPa 590
180
Tensile Strength: Yield (Proof), MPa 230
110

Thermal Properties

Latent Heat of Fusion, J/g 290
470
Maximum Temperature: Mechanical, °C 990
180
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1380
520
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 15
120
Thermal Expansion, µm/m-K 16
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
81

Otherwise Unclassified Properties

Base Metal Price, % relative 17
11
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 3.2
7.7
Embodied Energy, MJ/kg 46
140
Embodied Water, L/kg 150
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
1.7
Resilience: Unit (Modulus of Resilience), kJ/m3 140
80
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 21
17
Strength to Weight: Bending, points 20
24
Thermal Diffusivity, mm2/s 4.1
47
Thermal Shock Resistance, points 13
8.0

Alloy Composition

Aluminum (Al), % 0
82.2 to 91.8
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 19 to 21
0 to 0.15
Copper (Cu), % 0
3.0 to 5.0
Iron (Fe), % 64.1 to 71
0 to 1.0
Lead (Pb), % 0
0 to 0.3
Magnesium (Mg), % 0
0 to 0.55
Manganese (Mn), % 0 to 2.0
0.2 to 0.65
Nickel (Ni), % 10 to 12
0 to 0.45
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
5.0 to 7.0
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 2.0
Residuals, % 0
0 to 0.35