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2618A Aluminum vs. ASTM A266 Carbon Steel

2618A aluminum belongs to the aluminum alloys classification, while ASTM A266 carbon steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 2618A aluminum and the bottom bar is ASTM A266 carbon steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 4.5
21 to 26
Fatigue Strength, MPa 120
170 to 200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 260
320 to 380
Tensile Strength: Ultimate (UTS), MPa 440
500 to 600
Tensile Strength: Yield (Proof), MPa 410
230 to 290

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Maximum Temperature: Mechanical, °C 230
400
Melting Completion (Liquidus), °C 670
1460
Melting Onset (Solidus), °C 560
1420
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
51 to 52
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.1 to 8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 11
1.8
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.4
1.4
Embodied Energy, MJ/kg 150
18 to 19
Embodied Water, L/kg 1150
46 to 47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1180
140 to 230
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 41
18 to 21
Strength to Weight: Bending, points 44
18 to 20
Thermal Diffusivity, mm2/s 59
14
Thermal Shock Resistance, points 19
16 to 19