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A390.0 Aluminum vs. S39274 Stainless Steel

A390.0 aluminum belongs to the aluminum alloys classification, while S39274 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 A390.0 aluminum and the bottom bar is S39274 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110 to 140
270
Elastic (Young's, Tensile) Modulus, GPa 75
210
Elongation at Break, % 0.87 to 0.91
17
Fatigue Strength, MPa 70 to 100
380
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 28
81
Tensile Strength: Ultimate (UTS), MPa 190 to 290
900
Tensile Strength: Yield (Proof), MPa 190 to 290
620

Thermal Properties

Latent Heat of Fusion, J/g 640
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 580
1480
Melting Onset (Solidus), °C 480
1430
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 130
16
Thermal Expansion, µm/m-K 20
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 20
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 67
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 11
24
Density, g/cm3 2.7
8.0
Embodied Carbon, kg CO2/kg material 7.3
4.3
Embodied Energy, MJ/kg 140
60
Embodied Water, L/kg 950
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 1.6 to 2.6
140
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 580
940
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 52
25
Strength to Weight: Axial, points 19 to 30
32
Strength to Weight: Bending, points 27 to 36
26
Thermal Diffusivity, mm2/s 56
4.2
Thermal Shock Resistance, points 9.0 to 14
25

Alloy Composition

Aluminum (Al), % 75.3 to 79.6
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
24 to 26
Copper (Cu), % 4.0 to 5.0
0.2 to 0.8
Iron (Fe), % 0 to 0.5
57 to 65.6
Magnesium (Mg), % 0.45 to 0.65
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 16 to 18
0 to 0.8
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
1.5 to 2.5
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.2
0