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3105 Aluminum vs. AISI 205 Stainless Steel

3105 aluminum belongs to the aluminum alloys classification, while AISI 205 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 AISI 205 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 29 to 67
210 to 440
Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 1.1 to 20
11 to 51
Fatigue Strength, MPa 39 to 95
410 to 640
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 77 to 140
560 to 850
Tensile Strength: Ultimate (UTS), MPa 120 to 240
800 to 1430
Tensile Strength: Yield (Proof), MPa 46 to 220
450 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 400
280
Maximum Temperature: Mechanical, °C 180
880
Melting Completion (Liquidus), °C 660
1380
Melting Onset (Solidus), °C 640
1340
Specific Heat Capacity, J/kg-K 900
480
Thermal Expansion, µm/m-K 24
18

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.8
7.6
Embodied Carbon, kg CO2/kg material 8.2
2.6
Embodied Energy, MJ/kg 150
37
Embodied Water, L/kg 1180
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 19
150 to 430
Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
510 to 3060
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
26
Strength to Weight: Axial, points 12 to 24
29 to 52
Strength to Weight: Bending, points 20 to 31
25 to 37
Thermal Shock Resistance, points 5.2 to 11
16 to 29

Alloy Composition

Aluminum (Al), % 96 to 99.5
0
Carbon (C), % 0
0.12 to 0.25
Chromium (Cr), % 0 to 0.2
16.5 to 18.5
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 0 to 0.7
62.6 to 68.1
Magnesium (Mg), % 0.2 to 0.8
0
Manganese (Mn), % 0.3 to 0.8
14 to 15.5
Nickel (Ni), % 0
1.0 to 1.7
Nitrogen (N), % 0
0.32 to 0.4
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.4
0
Residuals, % 0 to 0.15
0

Comparable Variants