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2017 Aluminum vs. EN 1.4520 Stainless Steel

2017 aluminum belongs to the aluminum alloys classification, while EN 1.4520 stainless steel belongs to the iron 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 2017 aluminum and the bottom bar is EN 1.4520 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 12 to 18
26
Fatigue Strength, MPa 90 to 130
160
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 130 to 260
310
Tensile Strength: Ultimate (UTS), MPa 190 to 430
480
Tensile Strength: Yield (Proof), MPa 76 to 260
220

Thermal Properties

Latent Heat of Fusion, J/g 390
280
Maximum Temperature: Mechanical, °C 190
870
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 510
1400
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
20
Thermal Expansion, µm/m-K 24
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
8.5
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.0
2.2
Embodied Energy, MJ/kg 150
32
Embodied Water, L/kg 1140
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 66
100
Resilience: Unit (Modulus of Resilience), kJ/m3 41 to 470
120
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 17 to 40
17
Strength to Weight: Bending, points 24 to 42
18
Thermal Diffusivity, mm2/s 56
5.4
Thermal Shock Resistance, points 7.9 to 18
17

Alloy Composition

Aluminum (Al), % 91.6 to 95.5
0
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0 to 0.1
16 to 18
Copper (Cu), % 3.5 to 4.5
0
Iron (Fe), % 0 to 0.7
80.1 to 83.9
Magnesium (Mg), % 0.4 to 0.8
0
Manganese (Mn), % 0.4 to 1.0
0 to 0.5
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.2 to 0.8
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.15
0.15 to 0.8
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0