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308.0 Aluminum vs. EN 1.7709 Steel

308.0 aluminum belongs to the aluminum alloys classification, while EN 1.7709 steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, 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 1.7709 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
200 to 230
Elastic (Young's, Tensile) Modulus, GPa 73
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Tensile Strength: Ultimate (UTS), MPa 190
650 to 780

Thermal Properties

Latent Heat of Fusion, J/g 470
250
Maximum Temperature: Mechanical, °C 170
440
Melting Completion (Liquidus), °C 620
1470
Melting Onset (Solidus), °C 540
1420
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 140
33
Thermal Expansion, µm/m-K 20
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
3.4
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 7.7
2.3
Embodied Energy, MJ/kg 140
32
Embodied Water, L/kg 1080
56

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 18
23 to 27
Strength to Weight: Bending, points 25
21 to 24
Thermal Diffusivity, mm2/s 55
8.9
Thermal Shock Resistance, points 9.2
22 to 26

Alloy Composition

Aluminum (Al), % 85.7 to 91
0 to 0.030
Carbon (C), % 0
0.17 to 0.25
Chromium (Cr), % 0
1.2 to 1.5
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 0 to 1.0
95.2 to 97.5
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0.4 to 0.8
Molybdenum (Mo), % 0
0.55 to 0.8
Nickel (Ni), % 0
0 to 0.6
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 5.0 to 6.0
0 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Vanadium (V), % 0
0.2 to 0.35
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0 to 0.5
0