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SAE-AISI 1140 Steel vs. 4147 Aluminum

SAE-AISI 1140 steel belongs to the iron alloys classification, while 4147 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 1140 steel and the bottom bar is 4147 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
72
Elongation at Break, % 14 to 18
3.3
Fatigue Strength, MPa 230 to 370
42
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
27
Shear Strength, MPa 370 to 420
63
Tensile Strength: Ultimate (UTS), MPa 600 to 700
110
Tensile Strength: Yield (Proof), MPa 340 to 570
59

Thermal Properties

Latent Heat of Fusion, J/g 250
570
Maximum Temperature: Mechanical, °C 400
160
Melting Completion (Liquidus), °C 1460
580
Melting Onset (Solidus), °C 1420
560
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 51
130
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
33
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
120

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
9.5
Density, g/cm3 7.8
2.5
Embodied Carbon, kg CO2/kg material 1.4
7.7
Embodied Energy, MJ/kg 18
140
Embodied Water, L/kg 46
1050

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 93
3.1
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
24
Stiffness to Weight: Axial, points 13
16
Stiffness to Weight: Bending, points 24
55
Strength to Weight: Axial, points 21 to 25
12
Strength to Weight: Bending, points 20 to 22
20
Thermal Diffusivity, mm2/s 14
58
Thermal Shock Resistance, points 18 to 21
5.2

Alloy Composition

Aluminum (Al), % 0
85 to 88.9
Beryllium (Be), % 0
0 to 0.00030
Carbon (C), % 0.37 to 0.44
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 98.4 to 98.9
0 to 0.8
Magnesium (Mg), % 0
0.1 to 0.5
Manganese (Mn), % 0.7 to 1.0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
11 to 13
Sulfur (S), % 0.080 to 0.13
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15