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EN 1.7117 Steel vs. 705.0 Aluminum

EN 1.7117 steel belongs to the iron alloys classification, while 705.0 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, 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 1.7117 steel and the bottom bar is 705.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 480
62 to 65
Elastic (Young's, Tensile) Modulus, GPa 190
69
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
26
Tensile Strength: Ultimate (UTS), MPa 660 to 1930
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 270
390
Maximum Temperature: Mechanical, °C 420
180
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
610
Specific Heat Capacity, J/kg-K 480
890
Thermal Conductivity, W/m-K 43
140
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
34
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
110

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
9.5
Density, g/cm3 7.7
2.8
Embodied Carbon, kg CO2/kg material 1.5
8.4
Embodied Energy, MJ/kg 21
150
Embodied Water, L/kg 51
1170

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
49
Strength to Weight: Axial, points 24 to 69
24 to 26
Strength to Weight: Bending, points 22 to 44
31 to 32
Thermal Diffusivity, mm2/s 12
55
Thermal Shock Resistance, points 20 to 58
11

Alloy Composition

Aluminum (Al), % 0
92.3 to 98.6
Carbon (C), % 0.49 to 0.56
0
Chromium (Cr), % 0.7 to 1.0
0 to 0.4
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 95.2 to 96.4
0 to 0.8
Magnesium (Mg), % 0
1.4 to 1.8
Manganese (Mn), % 0.7 to 1.0
0 to 0.6
Nickel (Ni), % 0.5 to 0.7
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 1.2 to 1.5
0 to 0.2
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 3.3
Residuals, % 0
0 to 0.15