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A380.0 Aluminum vs. AISI 309 Stainless Steel

A380.0 aluminum belongs to the aluminum alloys classification, while AISI 309 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, 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 A380.0 aluminum and the bottom bar is AISI 309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 73
200
Elongation at Break, % 3.3
34 to 47
Fatigue Strength, MPa 140
250 to 280
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
78
Shear Strength, MPa 190
420 to 470
Tensile Strength: Ultimate (UTS), MPa 290
600 to 710
Tensile Strength: Yield (Proof), MPa 160
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 510
290
Maximum Temperature: Mechanical, °C 170
980
Melting Completion (Liquidus), °C 590
1450
Melting Onset (Solidus), °C 550
1400
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 96
16
Thermal Expansion, µm/m-K 22
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 78
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
19
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 7.5
3.6
Embodied Energy, MJ/kg 140
51
Embodied Water, L/kg 1040
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.3
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 180
170 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 48
25
Strength to Weight: Axial, points 28
21 to 25
Strength to Weight: Bending, points 34
20 to 23
Thermal Diffusivity, mm2/s 38
4.3
Thermal Shock Resistance, points 13
14 to 16

Alloy Composition

Aluminum (Al), % 80.3 to 89.5
0
Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
22 to 24
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 0 to 1.3
58 to 66
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 2.0
Nickel (Ni), % 0 to 0.5
12 to 15
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 7.5 to 9.5
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.35
0
Zinc (Zn), % 0 to 3.0
0
Residuals, % 0 to 0.5
0