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SAE-AISI 1140 Steel vs. EN AC-21000 Aluminum

SAE-AISI 1140 steel belongs to the iron alloys classification, while EN AC-21000 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 EN AC-21000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
100
Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 14 to 18
6.7
Fatigue Strength, MPa 230 to 370
100
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
27
Tensile Strength: Ultimate (UTS), MPa 600 to 700
340
Tensile Strength: Yield (Proof), MPa 340 to 570
240

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Maximum Temperature: Mechanical, °C 400
170
Melting Completion (Liquidus), °C 1460
670
Melting Onset (Solidus), °C 1420
550
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 51
130
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
34
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
100

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
11
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 1.4
8.0
Embodied Energy, MJ/kg 18
150
Embodied Water, L/kg 46
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 89 to 93
21
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 870
390
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 21 to 25
32
Strength to Weight: Bending, points 20 to 22
36
Thermal Diffusivity, mm2/s 14
49
Thermal Shock Resistance, points 18 to 21
15

Alloy Composition

Aluminum (Al), % 0
93.4 to 95.5
Carbon (C), % 0.37 to 0.44
0
Copper (Cu), % 0
4.2 to 5.0
Iron (Fe), % 98.4 to 98.9
0 to 0.35
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0
0.15 to 0.35
Manganese (Mn), % 0.7 to 1.0
0 to 0.1
Nickel (Ni), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0 to 0.2
Sulfur (S), % 0.080 to 0.13
0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0.15 to 0.3
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.1