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2017 Aluminum vs. EN 1.4477 Stainless Steel

2017 aluminum belongs to the aluminum alloys classification, while EN 1.4477 stainless steel belongs to the iron alloys. There are 30 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 2017 aluminum and the bottom bar is EN 1.4477 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 12 to 18
22 to 23
Fatigue Strength, MPa 90 to 130
420 to 490
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
81
Shear Strength, MPa 130 to 260
550 to 580
Tensile Strength: Ultimate (UTS), MPa 190 to 430
880 to 930
Tensile Strength: Yield (Proof), MPa 76 to 260
620 to 730

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 190
1100
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 510
1380
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
13
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
20
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.0
3.7
Embodied Energy, MJ/kg 150
52
Embodied Water, L/kg 1140
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 66
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 41 to 470
940 to 1290
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 17 to 40
31 to 33
Strength to Weight: Bending, points 24 to 42
26 to 27
Thermal Diffusivity, mm2/s 56
3.5
Thermal Shock Resistance, points 7.9 to 18
23 to 25

Alloy Composition

Aluminum (Al), % 91.6 to 95.5
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
28 to 30
Copper (Cu), % 3.5 to 4.5
0 to 0.8
Iron (Fe), % 0 to 0.7
56.6 to 63.6
Magnesium (Mg), % 0.4 to 0.8
0
Manganese (Mn), % 0.4 to 1.0
0.8 to 1.5
Molybdenum (Mo), % 0
1.5 to 2.6
Nickel (Ni), % 0
5.8 to 7.5
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0
0 to 0.030
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
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0