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SAE-AISI 4718 Steel vs. 6013 Aluminum

SAE-AISI 4718 steel belongs to the iron alloys classification, while 6013 aluminum belongs to the aluminum 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 SAE-AISI 4718 steel and the bottom bar is 6013 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 24
3.4 to 22
Fatigue Strength, MPa 270
98 to 140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 330
190 to 240
Tensile Strength: Ultimate (UTS), MPa 510
310 to 410
Tensile Strength: Yield (Proof), MPa 370
170 to 350

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 420
160
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
580
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 39
150
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
38
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
120

Otherwise Unclassified Properties

Base Metal Price, % relative 3.0
9.5
Density, g/cm3 7.9
2.8
Embodied Carbon, kg CO2/kg material 1.6
8.3
Embodied Energy, MJ/kg 21
150
Embodied Water, L/kg 51
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
13 to 58
Resilience: Unit (Modulus of Resilience), kJ/m3 360
200 to 900
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
49
Strength to Weight: Axial, points 18
31 to 41
Strength to Weight: Bending, points 18
37 to 44
Thermal Diffusivity, mm2/s 10
60
Thermal Shock Resistance, points 17
14 to 18

Alloy Composition

Aluminum (Al), % 0
94.8 to 97.8
Carbon (C), % 0.16 to 0.21
0
Chromium (Cr), % 0.35 to 0.55
0 to 0.1
Copper (Cu), % 0
0.6 to 1.1
Iron (Fe), % 96.3 to 97.4
0 to 0.5
Magnesium (Mg), % 0
0.8 to 1.2
Manganese (Mn), % 0.7 to 0.9
0.2 to 0.8
Molybdenum (Mo), % 0.3 to 0.4
0
Nickel (Ni), % 0.9 to 1.2
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0.6 to 1.0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15