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2618 Aluminum vs. EN 1.6570 Steel

2618 aluminum belongs to the aluminum alloys classification, while EN 1.6570 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 2618 aluminum and the bottom bar is EN 1.6570 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
270 to 340
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 5.8
11 to 17
Fatigue Strength, MPa 110
500 to 660
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Tensile Strength: Ultimate (UTS), MPa 420
910 to 1130
Tensile Strength: Yield (Proof), MPa 350
760 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Maximum Temperature: Mechanical, °C 210
440
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 160
40
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 11
3.9
Density, g/cm3 2.9
7.9
Embodied Carbon, kg CO2/kg material 8.3
1.7
Embodied Energy, MJ/kg 150
23
Embodied Water, L/kg 1150
56

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23
120 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 850
1520 to 3010
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 40
32 to 40
Strength to Weight: Bending, points 42
27 to 31
Thermal Diffusivity, mm2/s 62
11
Thermal Shock Resistance, points 19
27 to 33

Alloy Composition

Aluminum (Al), % 92.4 to 94.9
0
Carbon (C), % 0
0.28 to 0.35
Chromium (Cr), % 0
1.0 to 1.4
Copper (Cu), % 1.9 to 2.7
0
Iron (Fe), % 0.9 to 1.3
94 to 96.2
Magnesium (Mg), % 1.3 to 1.8
0
Manganese (Mn), % 0
0.6 to 1.0
Molybdenum (Mo), % 0
0.3 to 0.5
Nickel (Ni), % 0.9 to 1.2
1.6 to 2.1
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0.1 to 0.25
0 to 0.6
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0.040 to 0.1
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0