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SAE-AISI 1140 Steel vs. A390.0 Aluminum

SAE-AISI 1140 steel belongs to the iron alloys classification, while A390.0 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 A390.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
110 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
75
Elongation at Break, % 14 to 18
0.87 to 0.91
Fatigue Strength, MPa 230 to 370
70 to 100
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
28
Tensile Strength: Ultimate (UTS), MPa 600 to 700
190 to 290
Tensile Strength: Yield (Proof), MPa 340 to 570
190 to 290

Thermal Properties

Latent Heat of Fusion, J/g 250
640
Maximum Temperature: Mechanical, °C 400
170
Melting Completion (Liquidus), °C 1460
580
Melting Onset (Solidus), °C 1420
480
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 51
130
Thermal Expansion, µm/m-K 13
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
20
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
67

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
11
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.4
7.3
Embodied Energy, MJ/kg 18
140
Embodied Water, L/kg 46
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 93
1.6 to 2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
240 to 580
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
52
Strength to Weight: Axial, points 21 to 25
19 to 30
Strength to Weight: Bending, points 20 to 22
27 to 36
Thermal Diffusivity, mm2/s 14
56
Thermal Shock Resistance, points 18 to 21
9.0 to 14

Alloy Composition

Aluminum (Al), % 0
75.3 to 79.6
Carbon (C), % 0.37 to 0.44
0
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 98.4 to 98.9
0 to 0.5
Magnesium (Mg), % 0
0.45 to 0.65
Manganese (Mn), % 0.7 to 1.0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
16 to 18
Sulfur (S), % 0.080 to 0.13
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.2