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204.0 Aluminum vs. AISI 205 Stainless Steel

204.0 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 204.0 aluminum and the bottom bar is AISI 205 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90 to 120
210 to 440
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.7 to 7.8
11 to 51
Fatigue Strength, MPa 63 to 77
410 to 640
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 230 to 340
800 to 1430
Tensile Strength: Yield (Proof), MPa 180 to 220
450 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 390
280
Maximum Temperature: Mechanical, °C 170
880
Melting Completion (Liquidus), °C 650
1380
Melting Onset (Solidus), °C 580
1340
Specific Heat Capacity, J/kg-K 880
480
Thermal Expansion, µm/m-K 19
18

Otherwise Unclassified Properties

Base Metal Price, % relative 11
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 1150
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 23
150 to 430
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 350
510 to 3060
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
26
Strength to Weight: Axial, points 21 to 31
29 to 52
Strength to Weight: Bending, points 28 to 36
25 to 37
Thermal Shock Resistance, points 12 to 18
16 to 29

Alloy Composition

Aluminum (Al), % 93.4 to 95.5
0
Carbon (C), % 0
0.12 to 0.25
Chromium (Cr), % 0
16.5 to 18.5
Copper (Cu), % 4.2 to 5.0
0
Iron (Fe), % 0 to 0.35
62.6 to 68.1
Magnesium (Mg), % 0.15 to 0.35
0
Manganese (Mn), % 0 to 0.1
14 to 15.5
Nickel (Ni), % 0 to 0.050
1.0 to 1.7
Nitrogen (N), % 0
0.32 to 0.4
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0