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EN AC-43300 Aluminum vs. SAE-AISI 8740 Steel

EN AC-43300 aluminum belongs to the aluminum alloys classification, while SAE-AISI 8740 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 EN AC-43300 aluminum and the bottom bar is SAE-AISI 8740 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91 to 94
170 to 200
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 3.4 to 6.7
11 to 23
Fatigue Strength, MPa 76 to 77
270 to 350
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Tensile Strength: Ultimate (UTS), MPa 280 to 290
580 to 670
Tensile Strength: Yield (Proof), MPa 210 to 230
380 to 570

Thermal Properties

Latent Heat of Fusion, J/g 540
250
Maximum Temperature: Mechanical, °C 170
410
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 590
1420
Specific Heat Capacity, J/kg-K 910
470
Thermal Conductivity, W/m-K 140
39
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 140
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.6
Density, g/cm3 2.5
7.8
Embodied Carbon, kg CO2/kg material 7.9
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1080
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1 to 17
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 370
390 to 850
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 54
24
Strength to Weight: Axial, points 31 to 32
20 to 24
Strength to Weight: Bending, points 37 to 38
20 to 22
Thermal Diffusivity, mm2/s 59
10
Thermal Shock Resistance, points 13 to 14
17 to 20

Alloy Composition

Aluminum (Al), % 88.9 to 90.8
0
Carbon (C), % 0
0.38 to 0.43
Chromium (Cr), % 0
0.4 to 0.6
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.19
96.5 to 97.7
Magnesium (Mg), % 0.25 to 0.45
0
Manganese (Mn), % 0 to 0.1
0.75 to 1.0
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 0
0.4 to 0.7
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 9.0 to 10
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0