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SAE-AISI 5140 Steel vs. 1435 Aluminum

SAE-AISI 5140 steel belongs to the iron alloys classification, while 1435 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 5140 steel and the bottom bar is 1435 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 12 to 29
4.1 to 32
Fatigue Strength, MPa 220 to 570
27 to 49
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 360 to 600
54 to 87
Tensile Strength: Ultimate (UTS), MPa 560 to 970
81 to 150
Tensile Strength: Yield (Proof), MPa 290 to 840
23 to 130

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 420
170
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
640
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 45
230
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
60
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
200

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
9.0
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.4
8.2
Embodied Energy, MJ/kg 19
150
Embodied Water, L/kg 49
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 76 to 180
5.0 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 1880
3.8 to 110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 20 to 34
8.3 to 15
Strength to Weight: Bending, points 19 to 28
15 to 23
Thermal Diffusivity, mm2/s 12
93
Thermal Shock Resistance, points 16 to 29
3.6 to 6.7

Alloy Composition

Aluminum (Al), % 0
99.35 to 99.7
Carbon (C), % 0.38 to 0.43
0
Chromium (Cr), % 0.7 to 0.9
0
Copper (Cu), % 0
0 to 0.020
Iron (Fe), % 97.3 to 98.1
0.3 to 0.5
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0.7 to 0.9
0 to 0.050
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.15
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.030
Zinc (Zn), % 0
0 to 0.1

Comparable Variants