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EN 1.4371 Stainless Steel vs. 7116 Aluminum

EN 1.4371 stainless steel belongs to the iron alloys classification, while 7116 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 1.4371 stainless steel and the bottom bar is 7116 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 45 to 51
7.8
Fatigue Strength, MPa 290 to 340
160
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 520 to 540
220
Tensile Strength: Ultimate (UTS), MPa 740 to 750
370
Tensile Strength: Yield (Proof), MPa 320 to 340
330

Thermal Properties

Latent Heat of Fusion, J/g 280
380
Maximum Temperature: Mechanical, °C 880
170
Melting Completion (Liquidus), °C 1410
640
Melting Onset (Solidus), °C 1370
520
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 15
150
Thermal Expansion, µm/m-K 17
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
46
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
140

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 7.7
2.9
Embodied Carbon, kg CO2/kg material 2.6
8.2
Embodied Energy, MJ/kg 38
150
Embodied Water, L/kg 140
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 310
28
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 300
790
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 27
35
Strength to Weight: Bending, points 24
39
Thermal Diffusivity, mm2/s 4.0
58
Thermal Shock Resistance, points 16
16

Alloy Composition

Aluminum (Al), % 0
91.5 to 94.5
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 16 to 17.5
0
Copper (Cu), % 0 to 1.0
0.5 to 1.1
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 66.7 to 74.4
0 to 0.3
Magnesium (Mg), % 0
0.8 to 1.4
Manganese (Mn), % 6.0 to 8.0
0 to 0.050
Nickel (Ni), % 3.5 to 5.5
0
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0 to 0.15
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.050
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0
4.2 to 5.2
Residuals, % 0
0 to 0.15