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B390.0 Aluminum vs. SAE-AISI 8637 Steel

B390.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI 8637 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 B390.0 aluminum and the bottom bar is SAE-AISI 8637 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
190
Elongation at Break, % 0.88
23
Fatigue Strength, MPa 170
260
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 29
73
Tensile Strength: Ultimate (UTS), MPa 320
540
Tensile Strength: Yield (Proof), MPa 250
360

Thermal Properties

Latent Heat of Fusion, J/g 640
250
Maximum Temperature: Mechanical, °C 170
410
Melting Completion (Liquidus), °C 580
1460
Melting Onset (Solidus), °C 580
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 130
38
Thermal Expansion, µm/m-K 20
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 88
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.6
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 7.3
1.5
Embodied Energy, MJ/kg 130
20
Embodied Water, L/kg 940
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6
110
Resilience: Unit (Modulus of Resilience), kJ/m3 410
340
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 51
24
Strength to Weight: Axial, points 32
19
Strength to Weight: Bending, points 38
19
Thermal Diffusivity, mm2/s 55
10
Thermal Shock Resistance, points 15
18

Alloy Composition

Aluminum (Al), % 72.7 to 79.6
0
Carbon (C), % 0
0.35 to 0.4
Chromium (Cr), % 0
0.4 to 0.6
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 0 to 1.3
96.6 to 97.8
Magnesium (Mg), % 0.45 to 0.65
0
Manganese (Mn), % 0 to 0.5
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0 to 0.1
0.4 to 0.7
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 16 to 18
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 1.5
0
Residuals, % 0 to 0.2
0