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EN 1.7779 Steel vs. 6261 Aluminum

EN 1.7779 steel belongs to the iron alloys classification, while 6261 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 1.7779 steel and the bottom bar is 6261 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 16
9.0 to 16
Fatigue Strength, MPa 430
60 to 120
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 500
90 to 180
Tensile Strength: Ultimate (UTS), MPa 810
150 to 300
Tensile Strength: Yield (Proof), MPa 660
100 to 260

Thermal Properties

Latent Heat of Fusion, J/g 260
400
Maximum Temperature: Mechanical, °C 470
160
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
610
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 39
180
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
48
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
160

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 2.8
8.3
Embodied Energy, MJ/kg 41
150
Embodied Water, L/kg 64
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
21 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
77 to 500
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 29
15 to 31
Strength to Weight: Bending, points 25
23 to 37
Thermal Diffusivity, mm2/s 11
75
Thermal Shock Resistance, points 23
6.5 to 13

Alloy Composition

Aluminum (Al), % 0 to 0.040
96.6 to 98.6
Carbon (C), % 0.17 to 0.23
0
Chromium (Cr), % 3.0 to 3.3
0 to 0.1
Copper (Cu), % 0 to 0.3
0.15 to 0.4
Iron (Fe), % 93.8 to 95.4
0 to 0.4
Magnesium (Mg), % 0
0.7 to 1.0
Manganese (Mn), % 0.3 to 0.5
0.2 to 0.35
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
0.4 to 0.7
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.1
Vanadium (V), % 0.45 to 0.55
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15