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EN 1.8818 Steel vs. 707.0 Aluminum

EN 1.8818 steel belongs to the iron alloys classification, while 707.0 aluminum belongs to the aluminum alloys. There are 29 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 1.8818 steel and the bottom bar is 707.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Elongation at Break, % 27
1.7 to 3.4
Fatigue Strength, MPa 200
75 to 140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Tensile Strength: Ultimate (UTS), MPa 440
270 to 300
Tensile Strength: Yield (Proof), MPa 270
170 to 250

Thermal Properties

Latent Heat of Fusion, J/g 250
380
Maximum Temperature: Mechanical, °C 400
180
Melting Completion (Liquidus), °C 1460
630
Melting Onset (Solidus), °C 1420
600
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 48
150
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
37
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
110

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
9.5
Density, g/cm3 7.8
2.9
Embodied Carbon, kg CO2/kg material 1.6
8.3
Embodied Energy, MJ/kg 21
150
Embodied Water, L/kg 49
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
4.3 to 8.6
Resilience: Unit (Modulus of Resilience), kJ/m3 200
210 to 430
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 16
26 to 29
Strength to Weight: Bending, points 16
32 to 34
Thermal Diffusivity, mm2/s 13
58
Thermal Shock Resistance, points 13
12 to 13

Alloy Composition


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Aluminum (Al), % 0.015 to 0.034
90.5 to 93.6
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 0 to 0.35
0.2 to 0.4
Copper (Cu), % 0 to 0.6
0 to 0.2
Iron (Fe), % 95.9 to 99.985
0 to 0.8
Magnesium (Mg), % 0
1.8 to 2.4
Manganese (Mn), % 0 to 1.6
0.4 to 0.6
Molybdenum (Mo), % 0 to 0.13
0
Nickel (Ni), % 0 to 0.35
0
Niobium (Nb), % 0 to 0.060
0
Nitrogen (N), % 0 to 0.017
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 0.55
0 to 0.2
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0 to 0.060
0 to 0.25
Vanadium (V), % 0 to 0.1
0
Zinc (Zn), % 0
4.0 to 4.5
Residuals, % 0
0 to 0.15