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AISI 303 Stainless Steel vs. 2011 Aluminum

AISI 303 stainless steel belongs to the iron alloys classification, while 2011 aluminum belongs to the aluminum 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 AISI 303 stainless steel and the bottom bar is 2011 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 40 to 51
8.5 to 18
Fatigue Strength, MPa 230 to 360
74 to 120
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Shear Strength, MPa 430 to 470
190 to 250
Tensile Strength: Ultimate (UTS), MPa 600 to 690
310 to 420
Tensile Strength: Yield (Proof), MPa 230 to 420
140 to 310

Thermal Properties

Latent Heat of Fusion, J/g 290
390
Maximum Temperature: Mechanical, °C 930
190
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1400
540
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 16
140 to 170
Thermal Expansion, µm/m-K 17
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
35 to 45
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
100 to 130

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.8
3.1
Embodied Carbon, kg CO2/kg material 3.0
7.9
Embodied Energy, MJ/kg 42
150
Embodied Water, L/kg 140
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
29 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 440
140 to 680
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
44
Strength to Weight: Axial, points 21 to 25
27 to 37
Strength to Weight: Bending, points 20 to 22
32 to 40
Thermal Diffusivity, mm2/s 4.4
51 to 64
Thermal Shock Resistance, points 13 to 15
14 to 19

Alloy Composition

Aluminum (Al), % 0
91.3 to 94.6
Bismuth (Bi), % 0
0.2 to 0.6
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
5.0 to 6.0
Iron (Fe), % 67.3 to 74.9
0 to 0.7
Lead (Pb), % 0
0.2 to 0.6
Manganese (Mn), % 0 to 2.0
0
Nickel (Ni), % 8.0 to 10
0
Phosphorus (P), % 0 to 0.2
0
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0.15 to 0.35
0
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.15