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2018 Aluminum vs. EN 1.4982 Stainless Steel

2018 aluminum belongs to the aluminum alloys classification, while EN 1.4982 stainless steel belongs to the iron alloys. There are 31 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 1.4982 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
230
Elastic (Young's, Tensile) Modulus, GPa 73
200
Elongation at Break, % 9.6
28
Fatigue Strength, MPa 120
420
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Shear Strength, MPa 270
490
Tensile Strength: Ultimate (UTS), MPa 420
750
Tensile Strength: Yield (Proof), MPa 310
570

Thermal Properties

Latent Heat of Fusion, J/g 390
290
Maximum Temperature: Mechanical, °C 220
860
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 510
1390
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 150
13
Thermal Expansion, µm/m-K 22
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 11
22
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.1
4.9
Embodied Energy, MJ/kg 150
71
Embodied Water, L/kg 1130
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
190
Resilience: Unit (Modulus of Resilience), kJ/m3 670
830
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 38
27
Strength to Weight: Bending, points 41
23
Thermal Diffusivity, mm2/s 57
3.4
Thermal Shock Resistance, points 19
17

Alloy Composition

Aluminum (Al), % 89.7 to 94.4
0
Boron (B), % 0
0.0030 to 0.0090
Carbon (C), % 0
0.070 to 0.13
Chromium (Cr), % 0 to 0.1
14 to 16
Copper (Cu), % 3.5 to 4.5
0
Iron (Fe), % 0 to 1.0
61.8 to 69.7
Magnesium (Mg), % 0.45 to 0.9
0
Manganese (Mn), % 0 to 0.2
5.5 to 7.0
Molybdenum (Mo), % 0
0.8 to 1.2
Nickel (Ni), % 1.7 to 2.3
9.0 to 11
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.9
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
0.15 to 0.4
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0