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4115 Aluminum vs. SAE-AISI 1552 Steel

4115 aluminum belongs to the aluminum alloys classification, while SAE-AISI 1552 steel belongs to the iron alloys. There are 31 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 4115 aluminum and the bottom bar is SAE-AISI 1552 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 38 to 68
220 to 250
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 1.1 to 11
11 to 14
Fatigue Strength, MPa 39 to 76
290 to 400
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
72
Shear Strength, MPa 71 to 130
460 to 510
Tensile Strength: Ultimate (UTS), MPa 120 to 220
760 to 840
Tensile Strength: Yield (Proof), MPa 39 to 190
460 to 650

Thermal Properties

Latent Heat of Fusion, J/g 420
250
Maximum Temperature: Mechanical, °C 160
400
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 590
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 160
51
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
11
Electrical Conductivity: Equal Weight (Specific), % IACS 140
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.1
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 1160
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.1 to 10
81 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 11 to 270
560 to 1130
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 12 to 23
27 to 30
Strength to Weight: Bending, points 20 to 30
24 to 25
Thermal Diffusivity, mm2/s 66
14
Thermal Shock Resistance, points 5.2 to 9.9
26 to 29

Alloy Composition

Aluminum (Al), % 94.6 to 97.4
0
Carbon (C), % 0
0.47 to 0.55
Copper (Cu), % 0.1 to 0.5
0
Iron (Fe), % 0 to 0.7
97.9 to 98.3
Magnesium (Mg), % 0.1 to 0.5
0
Manganese (Mn), % 0.6 to 1.2
1.2 to 1.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 1.8 to 2.2
0
Sulfur (S), % 0
0 to 0.050
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0