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B535.0 Aluminum vs. SAE-AISI A4 Steel

B535.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI A4 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, 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 B535.0 aluminum and the bottom bar is SAE-AISI A4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 66
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 25
73
Tensile Strength: Ultimate (UTS), MPa 260
710 to 2050

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Melting Completion (Liquidus), °C 630
1450
Melting Onset (Solidus), °C 550
1410
Specific Heat Capacity, J/kg-K 910
470
Thermal Conductivity, W/m-K 96
40
Thermal Expansion, µm/m-K 25
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 82
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
3.9
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 9.4
1.8
Embodied Energy, MJ/kg 160
24
Embodied Water, L/kg 1180
59

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 51
24
Strength to Weight: Axial, points 28
25 to 73
Strength to Weight: Bending, points 35
23 to 46
Thermal Diffusivity, mm2/s 40
11
Thermal Shock Resistance, points 11
23 to 67

Alloy Composition

Aluminum (Al), % 91.7 to 93.4
0
Carbon (C), % 0
1.0 to 1.1
Chromium (Cr), % 0
0.9 to 2.2
Copper (Cu), % 0 to 0.1
0 to 0.25
Iron (Fe), % 0 to 0.15
92 to 95.5
Magnesium (Mg), % 6.5 to 7.5
0
Manganese (Mn), % 0 to 0.050
1.8 to 2.2
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.15
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0.1 to 0.25
0
Residuals, % 0 to 0.15
0