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8176 Aluminum vs. S38100 Stainless Steel

8176 aluminum belongs to the aluminum alloys classification, while S38100 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 8176 aluminum and the bottom bar is S38100 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 15
45
Fatigue Strength, MPa 59
210
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
76
Shear Strength, MPa 70
400
Tensile Strength: Ultimate (UTS), MPa 160
580
Tensile Strength: Yield (Proof), MPa 95
230

Thermal Properties

Latent Heat of Fusion, J/g 400
320
Maximum Temperature: Mechanical, °C 170
970
Melting Completion (Liquidus), °C 660
1400
Melting Onset (Solidus), °C 650
1350
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 230
15
Thermal Expansion, µm/m-K 24
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 61
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 200
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
20
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.2
3.8
Embodied Energy, MJ/kg 150
54
Embodied Water, L/kg 1190
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
210
Resilience: Unit (Modulus of Resilience), kJ/m3 66
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 16
21
Strength to Weight: Bending, points 24
20
Thermal Diffusivity, mm2/s 93
4.0
Thermal Shock Resistance, points 7.0
13

Alloy Composition

Aluminum (Al), % 98.6 to 99.6
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
17 to 19
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0.4 to 1.0
57.9 to 64
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
17.5 to 18.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.030 to 0.15
1.5 to 2.5
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0