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EN 1.7386 Steel vs. EN AC-21200 Aluminum

EN 1.7386 steel belongs to the iron alloys classification, while EN AC-21200 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 EN 1.7386 steel and the bottom bar is EN AC-21200 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
120 to 130
Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 18 to 21
3.9 to 6.2
Fatigue Strength, MPa 170 to 290
110 to 130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
27
Tensile Strength: Ultimate (UTS), MPa 550 to 670
410 to 440
Tensile Strength: Yield (Proof), MPa 240 to 440
270 to 360

Thermal Properties

Latent Heat of Fusion, J/g 270
390
Maximum Temperature: Mechanical, °C 600
170
Melting Completion (Liquidus), °C 1450
660
Melting Onset (Solidus), °C 1410
550
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 26
130
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
34
Electrical Conductivity: Equal Weight (Specific), % IACS 10
100

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
10
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 2.0
8.0
Embodied Energy, MJ/kg 28
150
Embodied Water, L/kg 88
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92 to 110
16 to 22
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 490
500 to 930
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 20 to 24
38 to 40
Strength to Weight: Bending, points 19 to 22
41 to 43
Thermal Diffusivity, mm2/s 6.9
49
Thermal Shock Resistance, points 15 to 18
18 to 19

Alloy Composition

Aluminum (Al), % 0 to 0.040
93.3 to 95.7
Carbon (C), % 0.080 to 0.15
0
Chromium (Cr), % 8.0 to 10
0
Copper (Cu), % 0 to 0.3
4.0 to 5.0
Iron (Fe), % 86.8 to 90.5
0 to 0.2
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 0
0.15 to 0.5
Manganese (Mn), % 0.3 to 0.6
0.2 to 0.5
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.25 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0 to 0.030
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.1