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EN 1.4347 Stainless Steel vs. 7108A Aluminum

EN 1.4347 stainless steel belongs to the iron alloys classification, while 7108A 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 1.4347 stainless steel and the bottom bar is 7108A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 23
11 to 13
Fatigue Strength, MPa 320
120 to 130
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 79
26
Tensile Strength: Ultimate (UTS), MPa 660
350
Tensile Strength: Yield (Proof), MPa 480
290 to 300

Thermal Properties

Latent Heat of Fusion, J/g 300
380
Maximum Temperature: Mechanical, °C 1100
210
Melting Completion (Liquidus), °C 1410
630
Melting Onset (Solidus), °C 1370
520
Specific Heat Capacity, J/kg-K 490
870
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
36
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
110

Otherwise Unclassified Properties

Base Metal Price, % relative 16
10
Density, g/cm3 7.7
2.9
Embodied Carbon, kg CO2/kg material 3.1
8.3
Embodied Energy, MJ/kg 44
150
Embodied Water, L/kg 170
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
38 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 570
610 to 640
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 24
33 to 34
Strength to Weight: Bending, points 22
38
Thermal Diffusivity, mm2/s 4.0
59
Thermal Shock Resistance, points 19
15 to 16

Alloy Composition

Aluminum (Al), % 0
91.6 to 94.4
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 25 to 27
0 to 0.040
Copper (Cu), % 0
0 to 0.050
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 62.2 to 69.4
0 to 0.3
Magnesium (Mg), % 0
0.7 to 1.5
Manganese (Mn), % 0 to 1.5
0 to 0.050
Nickel (Ni), % 5.5 to 7.5
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.5
0 to 0.2
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.030
Zinc (Zn), % 0
4.8 to 5.8
Zirconium (Zr), % 0
0.15 to 0.25
Residuals, % 0
0 to 0.15