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EN AC-42100 Aluminum vs. SAE-AISI 50B44 Steel

EN AC-42100 aluminum belongs to the aluminum alloys classification, while SAE-AISI 50B44 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-42100 aluminum and the bottom bar is SAE-AISI 50B44 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91
170
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 3.4 to 9.0
22
Fatigue Strength, MPa 76 to 82
250
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Tensile Strength: Ultimate (UTS), MPa 280 to 290
570
Tensile Strength: Yield (Proof), MPa 210 to 230
360

Thermal Properties

Latent Heat of Fusion, J/g 500
250
Maximum Temperature: Mechanical, °C 170
410
Melting Completion (Liquidus), °C 610
1460
Melting Onset (Solidus), °C 600
1420
Specific Heat Capacity, J/kg-K 910
470
Thermal Conductivity, W/m-K 150
46
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.0
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 8.0
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 1110
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1 to 23
110
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 370
350
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 53
24
Strength to Weight: Axial, points 30 to 31
20
Strength to Weight: Bending, points 37 to 38
20
Thermal Diffusivity, mm2/s 66
12
Thermal Shock Resistance, points 13
17

Alloy Composition

Aluminum (Al), % 91.3 to 93.3
0
Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 0
0.43 to 0.48
Chromium (Cr), % 0
0.2 to 0.6
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.19
97.5 to 98.5
Magnesium (Mg), % 0.25 to 0.45
0
Manganese (Mn), % 0 to 0.1
0.75 to 1.0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 6.5 to 7.5
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0