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390.0 Aluminum vs. S20910 Stainless Steel

390.0 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 (6, 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 390.0 aluminum and the bottom bar is S20910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
230 to 290
Elastic (Young's, Tensile) Modulus, GPa 75
200
Elongation at Break, % 1.0
14 to 39
Fatigue Strength, MPa 76 to 110
310 to 460
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
79
Tensile Strength: Ultimate (UTS), MPa 280 to 300
780 to 940
Tensile Strength: Yield (Proof), MPa 240 to 270
430 to 810

Thermal Properties

Latent Heat of Fusion, J/g 640
300
Maximum Temperature: Mechanical, °C 170
1080
Melting Completion (Liquidus), °C 650
1420
Melting Onset (Solidus), °C 560
1380
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 130
13
Thermal Expansion, µm/m-K 18
16

Otherwise Unclassified Properties

Base Metal Price, % relative 11
22
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 7.3
4.8
Embodied Energy, MJ/kg 130
68
Embodied Water, L/kg 950
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.7 to 2.9
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 470
460 to 1640
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 52
25
Strength to Weight: Axial, points 28 to 30
28 to 33
Strength to Weight: Bending, points 35 to 36
24 to 27
Thermal Diffusivity, mm2/s 56
3.6
Thermal Shock Resistance, points 14 to 15
17 to 21

Alloy Composition

Aluminum (Al), % 74.5 to 79.6
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
20.5 to 23.5
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 0 to 1.3
52.1 to 62.1
Magnesium (Mg), % 0.45 to 0.65
0
Manganese (Mn), % 0 to 0.1
4.0 to 6.0
Molybdenum (Mo), % 0
1.5 to 3.0
Nickel (Ni), % 0
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), % 16 to 18
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Vanadium (V), % 0
0.1 to 0.3
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.2
0