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EN 1.7779 Steel vs. EN AC-51100 Aluminum

EN 1.7779 steel belongs to the iron alloys classification, while EN AC-51100 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 EN AC-51100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
57
Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 16
4.5
Fatigue Strength, MPa 430
58
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Tensile Strength: Ultimate (UTS), MPa 810
160
Tensile Strength: Yield (Proof), MPa 660
80

Thermal Properties

Latent Heat of Fusion, J/g 260
400
Maximum Temperature: Mechanical, °C 470
170
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
620
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 39
130
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
34
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
110

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
8.7
Embodied Energy, MJ/kg 41
150
Embodied Water, L/kg 64
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
6.0
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
47
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 29
17
Strength to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 11
53
Thermal Shock Resistance, points 23
7.3

Alloy Composition

Aluminum (Al), % 0 to 0.040
94.5 to 97.5
Carbon (C), % 0.17 to 0.23
0
Chromium (Cr), % 3.0 to 3.3
0
Copper (Cu), % 0 to 0.3
0 to 0.050
Iron (Fe), % 93.8 to 95.4
0 to 0.55
Magnesium (Mg), % 0
2.5 to 3.5
Manganese (Mn), % 0.3 to 0.5
0 to 0.45
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 0.55
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.2
Vanadium (V), % 0.45 to 0.55
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15