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EN 1.7779 Steel vs. 201.0 Aluminum

EN 1.7779 steel belongs to the iron alloys classification, while 201.0 aluminum belongs to the aluminum alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, 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 1.7779 steel and the bottom bar is 201.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
95 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 16
4.4 to 20
Fatigue Strength, MPa 430
120 to 150
Impact Strength: V-Notched Charpy, J 38
10 to 22
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Shear Strength, MPa 500
290
Tensile Strength: Ultimate (UTS), MPa 810
370 to 470
Tensile Strength: Yield (Proof), MPa 660
220 to 400

Thermal Properties

Latent Heat of Fusion, J/g 260
390
Maximum Temperature: Mechanical, °C 470
170
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
570
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 39
120
Thermal Expansion, µm/m-K 13
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
30 to 33
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
87 to 97

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
38
Density, g/cm3 7.8
3.1
Embodied Carbon, kg CO2/kg material 2.8
8.7
Embodied Energy, MJ/kg 41
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
19 to 63
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
330 to 1160
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
45
Strength to Weight: Axial, points 29
33 to 42
Strength to Weight: Bending, points 25
37 to 44
Thermal Diffusivity, mm2/s 11
45
Thermal Shock Resistance, points 23
19 to 25

Alloy Composition

Aluminum (Al), % 0 to 0.040
92.1 to 95.1
Carbon (C), % 0.17 to 0.23
0
Chromium (Cr), % 3.0 to 3.3
0
Copper (Cu), % 0 to 0.3
4.0 to 5.2
Iron (Fe), % 93.8 to 95.4
0 to 0.15
Magnesium (Mg), % 0
0.15 to 0.55
Manganese (Mn), % 0.3 to 0.5
0.2 to 0.5
Molybdenum (Mo), % 0.5 to 0.6
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.15 to 0.35
0 to 0.1
Silver (Ag), % 0
0.4 to 1.0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0.15 to 0.35
Vanadium (V), % 0.45 to 0.55
0
Residuals, % 0
0 to 0.1