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7108 Aluminum vs. EN 1.4005 Stainless Steel

7108 aluminum belongs to the aluminum alloys classification, while EN 1.4005 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 7108 aluminum and the bottom bar is EN 1.4005 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 11
13 to 21
Fatigue Strength, MPa 120
240 to 290
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
76
Shear Strength, MPa 210
390 to 450
Tensile Strength: Ultimate (UTS), MPa 350
630 to 750
Tensile Strength: Yield (Proof), MPa 290
370 to 500

Thermal Properties

Latent Heat of Fusion, J/g 380
270
Maximum Temperature: Mechanical, °C 210
760
Melting Completion (Liquidus), °C 630
1440
Melting Onset (Solidus), °C 530
1400
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
30
Thermal Expansion, µm/m-K 24
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 120
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
7.0
Density, g/cm3 2.9
7.7
Embodied Carbon, kg CO2/kg material 8.3
2.0
Embodied Energy, MJ/kg 150
28
Embodied Water, L/kg 1150
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38
90 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 620
350 to 650
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 34
23 to 27
Strength to Weight: Bending, points 38
21 to 24
Thermal Diffusivity, mm2/s 59
8.1
Thermal Shock Resistance, points 16
23 to 27

Alloy Composition

Aluminum (Al), % 92.4 to 94.7
0
Carbon (C), % 0
0.060 to 0.15
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.1
82.4 to 87.8
Magnesium (Mg), % 0.7 to 1.4
0
Manganese (Mn), % 0 to 0.050
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.6
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0.15 to 0.35
Titanium (Ti), % 0 to 0.050
0
Zinc (Zn), % 4.5 to 5.5
0
Zirconium (Zr), % 0.12 to 0.25
0
Residuals, % 0 to 0.15
0