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AISI 303 Stainless Steel vs. 2011A Aluminum

AISI 303 stainless steel belongs to the iron alloys classification, while 2011A 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 2011A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 40 to 51
6.8 to 16
Fatigue Strength, MPa 230 to 360
75 to 100
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 430 to 470
190 to 250
Tensile Strength: Ultimate (UTS), MPa 600 to 690
310 to 410
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
660
Melting Onset (Solidus), °C 1400
550
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 16
130
Thermal Expansion, µm/m-K 17
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
33
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
96

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
20 to 40
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 440
140 to 670
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
44
Strength to Weight: Axial, points 21 to 25
28 to 37
Strength to Weight: Bending, points 20 to 22
33 to 40
Thermal Diffusivity, mm2/s 4.4
49
Thermal Shock Resistance, points 13 to 15
14 to 18

Alloy Composition

Aluminum (Al), % 0
91.5 to 95.1
Bismuth (Bi), % 0
0.2 to 0.6
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
4.5 to 6.0
Iron (Fe), % 67.3 to 74.9
0 to 0.5
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