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3105 Aluminum vs. S13800 Stainless Steel

3105 aluminum belongs to the aluminum alloys classification, while S13800 stainless steel belongs to the iron alloys. There are 31 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 3105 aluminum and the bottom bar is S13800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 29 to 67
290 to 480
Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 1.1 to 20
11 to 18
Fatigue Strength, MPa 39 to 95
410 to 870
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 77 to 140
610 to 1030
Tensile Strength: Ultimate (UTS), MPa 120 to 240
980 to 1730
Tensile Strength: Yield (Proof), MPa 46 to 220
660 to 1580

Thermal Properties

Latent Heat of Fusion, J/g 400
280
Maximum Temperature: Mechanical, °C 180
810
Melting Completion (Liquidus), °C 660
1450
Melting Onset (Solidus), °C 640
1410
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 170
16
Thermal Expansion, µm/m-K 24
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
15
Density, g/cm3 2.8
7.9
Embodied Carbon, kg CO2/kg material 8.2
3.4
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1180
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 19
150 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
1090 to 5490
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 12 to 24
35 to 61
Strength to Weight: Bending, points 20 to 31
28 to 41
Thermal Diffusivity, mm2/s 68
4.3
Thermal Shock Resistance, points 5.2 to 11
33 to 58

Alloy Composition

Aluminum (Al), % 96 to 99.5
0.9 to 1.4
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0 to 0.2
12.3 to 13.2
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 0 to 0.7
73.6 to 77.3
Magnesium (Mg), % 0.2 to 0.8
0
Manganese (Mn), % 0.3 to 0.8
0 to 0.2
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
7.5 to 8.5
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.6
0 to 0.1
Sulfur (S), % 0
0 to 0.0080
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.4
0
Residuals, % 0 to 0.15
0