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771.0 Aluminum vs. AISI 205 Stainless Steel

771.0 aluminum belongs to the aluminum alloys classification, while AISI 205 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, 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 771.0 aluminum and the bottom bar is AISI 205 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 85 to 120
210 to 440
Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 1.7 to 6.5
11 to 51
Fatigue Strength, MPa 92 to 180
410 to 640
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 250 to 370
800 to 1430
Tensile Strength: Yield (Proof), MPa 210 to 350
450 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 380
280
Maximum Temperature: Mechanical, °C 180
880
Melting Completion (Liquidus), °C 630
1380
Melting Onset (Solidus), °C 620
1340
Specific Heat Capacity, J/kg-K 870
480
Thermal Expansion, µm/m-K 24
18

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 3.0
7.6
Embodied Carbon, kg CO2/kg material 8.0
2.6
Embodied Energy, MJ/kg 150
37
Embodied Water, L/kg 1130
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4 to 20
150 to 430
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 900
510 to 3060
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
26
Strength to Weight: Axial, points 23 to 35
29 to 52
Strength to Weight: Bending, points 29 to 39
25 to 37
Thermal Shock Resistance, points 11 to 16
16 to 29

Alloy Composition

Aluminum (Al), % 90.5 to 92.5
0
Carbon (C), % 0
0.12 to 0.25
Chromium (Cr), % 0.060 to 0.2
16.5 to 18.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.15
62.6 to 68.1
Magnesium (Mg), % 0.8 to 1.0
0
Manganese (Mn), % 0 to 0.1
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 0.15
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0.1 to 0.2
0
Zinc (Zn), % 6.5 to 7.5
0
Residuals, % 0 to 0.15
0