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4115 Aluminum vs. SAE-AISI D3 Steel

4115 aluminum belongs to the aluminum alloys classification, while SAE-AISI D3 steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, 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 D3 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 1.1 to 11
9.8 to 15
Fatigue Strength, MPa 39 to 76
310 to 940
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
74
Shear Strength, MPa 71 to 130
470 to 1220
Tensile Strength: Ultimate (UTS), MPa 120 to 220
770 to 2050
Tensile Strength: Yield (Proof), MPa 39 to 190
480 to 1550

Thermal Properties

Latent Heat of Fusion, J/g 420
270
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 590
1390
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 160
31
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 140
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
8.0
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.1
3.2
Embodied Energy, MJ/kg 150
48
Embodied Water, L/kg 1160
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.1 to 10
97 to 180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 12 to 23
28 to 74
Strength to Weight: Bending, points 20 to 30
24 to 47
Thermal Diffusivity, mm2/s 66
8.3
Thermal Shock Resistance, points 5.2 to 9.9
23 to 63

Alloy Composition

Aluminum (Al), % 94.6 to 97.4
0
Carbon (C), % 0
2.0 to 2.4
Chromium (Cr), % 0
11 to 13.5
Copper (Cu), % 0.1 to 0.5
0 to 0.25
Iron (Fe), % 0 to 0.7
80.3 to 87
Magnesium (Mg), % 0.1 to 0.5
0
Manganese (Mn), % 0.6 to 1.2
0 to 0.6
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 1.8 to 2.2
0 to 0.6
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
0 to 1.0
Vanadium (V), % 0
0 to 1.0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0

Comparable Variants