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2018 Aluminum vs. EN 1.4630 Stainless Steel

2018 aluminum belongs to the aluminum alloys classification, while EN 1.4630 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 2018 aluminum and the bottom bar is EN 1.4630 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
190
Elongation at Break, % 9.6
23
Fatigue Strength, MPa 120
170
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Shear Strength, MPa 270
300
Tensile Strength: Ultimate (UTS), MPa 420
480
Tensile Strength: Yield (Proof), MPa 310
250

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 220
800
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 510
1390
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 150
28
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 120
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
9.5
Density, g/cm3 3.1
7.7
Embodied Carbon, kg CO2/kg material 8.1
2.5
Embodied Energy, MJ/kg 150
36
Embodied Water, L/kg 1130
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
92
Resilience: Unit (Modulus of Resilience), kJ/m3 670
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 38
17
Strength to Weight: Bending, points 41
18
Thermal Diffusivity, mm2/s 57
7.5
Thermal Shock Resistance, points 19
17

Alloy Composition

Aluminum (Al), % 89.7 to 94.4
0 to 1.5
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.1
13 to 16
Copper (Cu), % 3.5 to 4.5
0 to 0.5
Iron (Fe), % 0 to 1.0
77.1 to 86.7
Magnesium (Mg), % 0.45 to 0.9
0
Manganese (Mn), % 0 to 0.2
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 1.7 to 2.3
0 to 0.5
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 0 to 0.9
0.2 to 1.5
Sulfur (S), % 0
0 to 0.050
Titanium (Ti), % 0
0.15 to 0.8
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0