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308.0 Aluminum vs. EN 1.4439 Stainless Steel

308.0 aluminum belongs to the aluminum alloys classification, while EN 1.4439 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 308.0 aluminum and the bottom bar is EN 1.4439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
220
Elastic (Young's, Tensile) Modulus, GPa 73
200
Elongation at Break, % 2.0
40
Fatigue Strength, MPa 89
270
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
79
Shear Strength, MPa 150
470
Tensile Strength: Ultimate (UTS), MPa 190
680
Tensile Strength: Yield (Proof), MPa 110
310

Thermal Properties

Latent Heat of Fusion, J/g 470
290
Maximum Temperature: Mechanical, °C 170
980
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 540
1410
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 140
14
Thermal Expansion, µm/m-K 20
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
22
Density, g/cm3 2.9
7.9
Embodied Carbon, kg CO2/kg material 7.7
4.5
Embodied Energy, MJ/kg 140
61
Embodied Water, L/kg 1080
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.3
220
Resilience: Unit (Modulus of Resilience), kJ/m3 83
240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 18
24
Strength to Weight: Bending, points 25
22
Thermal Diffusivity, mm2/s 55
3.8
Thermal Shock Resistance, points 9.2
15

Alloy Composition

Aluminum (Al), % 85.7 to 91
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
16.5 to 18.5
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 0 to 1.0
58.7 to 66.9
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 2.0
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 0
12.5 to 14.5
Nitrogen (N), % 0
0.12 to 0.22
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 5.0 to 6.0
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0 to 0.5
0