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S20161 Stainless Steel vs. 7022 Aluminum

S20161 stainless steel belongs to the iron alloys classification, while 7022 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 S20161 stainless steel and the bottom bar is 7022 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Elongation at Break, % 46
6.3 to 8.0
Fatigue Strength, MPa 360
140 to 170
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
26
Shear Strength, MPa 690
290 to 320
Tensile Strength: Ultimate (UTS), MPa 980
490 to 540
Tensile Strength: Yield (Proof), MPa 390
390 to 460

Thermal Properties

Latent Heat of Fusion, J/g 330
380
Maximum Temperature: Mechanical, °C 870
200
Melting Completion (Liquidus), °C 1380
640
Melting Onset (Solidus), °C 1330
480
Specific Heat Capacity, J/kg-K 490
870
Thermal Conductivity, W/m-K 15
140
Thermal Expansion, µm/m-K 16
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
21
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
65

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 7.5
2.9
Embodied Carbon, kg CO2/kg material 2.7
8.5
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 130
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 360
29 to 40
Resilience: Unit (Modulus of Resilience), kJ/m3 390
1100 to 1500
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 26
47
Strength to Weight: Axial, points 36
47 to 51
Strength to Weight: Bending, points 29
47 to 50
Thermal Diffusivity, mm2/s 4.0
54
Thermal Shock Resistance, points 22
21 to 23

Alloy Composition

Aluminum (Al), % 0
87.9 to 92.4
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 15 to 18
0.1 to 0.3
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 65.6 to 73.9
0 to 0.5
Magnesium (Mg), % 0
2.6 to 3.7
Manganese (Mn), % 4.0 to 6.0
0.1 to 0.4
Nickel (Ni), % 4.0 to 6.0
0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 3.0 to 4.0
0 to 0.5
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
4.3 to 5.2
Zirconium (Zr), % 0
0 to 0.2
Residuals, % 0
0 to 0.15