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2011 Aluminum vs. S17700 Stainless Steel

2011 aluminum belongs to the aluminum alloys classification, while S17700 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 2011 aluminum and the bottom bar is S17700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 8.5 to 18
1.0 to 23
Fatigue Strength, MPa 74 to 120
290 to 560
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Shear Strength, MPa 190 to 250
740 to 940
Tensile Strength: Ultimate (UTS), MPa 310 to 420
1180 to 1650
Tensile Strength: Yield (Proof), MPa 140 to 310
430 to 1210

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 190
890
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 540
1400
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 140 to 170
15
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35 to 45
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 100 to 130
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 11
13
Density, g/cm3 3.1
7.7
Embodied Carbon, kg CO2/kg material 7.9
2.8
Embodied Energy, MJ/kg 150
40
Embodied Water, L/kg 1150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29 to 52
15 to 210
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 680
460 to 3750
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 44
25
Strength to Weight: Axial, points 27 to 37
42 to 59
Strength to Weight: Bending, points 32 to 40
32 to 40
Thermal Diffusivity, mm2/s 51 to 64
4.1
Thermal Shock Resistance, points 14 to 19
39 to 54

Alloy Composition

Aluminum (Al), % 91.3 to 94.6
0.75 to 1.5
Bismuth (Bi), % 0.2 to 0.6
0
Carbon (C), % 0
0 to 0.090
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 5.0 to 6.0
0
Iron (Fe), % 0 to 0.7
70.5 to 76.8
Lead (Pb), % 0.2 to 0.6
0
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
6.5 to 7.8
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.3
0
Residuals, % 0 to 0.15
0