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204.0 Aluminum vs. S20910 Stainless Steel

204.0 aluminum belongs to the aluminum alloys classification, while S20910 stainless steel belongs to the iron alloys. There are 28 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 204.0 aluminum and the bottom bar is S20910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90 to 120
230 to 290
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.7 to 7.8
14 to 39
Fatigue Strength, MPa 63 to 77
310 to 460
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
79
Tensile Strength: Ultimate (UTS), MPa 230 to 340
780 to 940
Tensile Strength: Yield (Proof), MPa 180 to 220
430 to 810

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 170
1080
Melting Completion (Liquidus), °C 650
1420
Melting Onset (Solidus), °C 580
1380
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 120
13
Thermal Expansion, µm/m-K 19
16

Otherwise Unclassified Properties

Base Metal Price, % relative 11
22
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.0
4.8
Embodied Energy, MJ/kg 150
68
Embodied Water, L/kg 1150
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 23
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 350
460 to 1640
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 21 to 31
28 to 33
Strength to Weight: Bending, points 28 to 36
24 to 27
Thermal Diffusivity, mm2/s 46
3.6
Thermal Shock Resistance, points 12 to 18
17 to 21

Alloy Composition

Aluminum (Al), % 93.4 to 95.5
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
20.5 to 23.5
Copper (Cu), % 4.2 to 5.0
0
Iron (Fe), % 0 to 0.35
52.1 to 62.1
Magnesium (Mg), % 0.15 to 0.35
0
Manganese (Mn), % 0 to 0.1
4.0 to 6.0
Molybdenum (Mo), % 0
1.5 to 3.0
Nickel (Ni), % 0 to 0.050
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0.15 to 0.3
0
Vanadium (V), % 0
0.1 to 0.3
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0