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ASTM A266 Carbon Steel vs. 2117 Aluminum

ASTM A266 carbon steel belongs to the iron alloys classification, while 2117 aluminum belongs to the aluminum alloys. There are 31 material properties with values for both materials. Properties with values for just one material (1, 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 ASTM A266 carbon steel and the bottom bar is 2117 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
70
Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 21 to 26
26
Fatigue Strength, MPa 170 to 200
95
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Shear Strength, MPa 320 to 380
200
Tensile Strength: Ultimate (UTS), MPa 500 to 600
300
Tensile Strength: Yield (Proof), MPa 230 to 290
170

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 400
220
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
550
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 51 to 52
150
Thermal Expansion, µm/m-K 12
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
40
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1 to 8.2
120

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
10
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 1.4
8.2
Embodied Energy, MJ/kg 18 to 19
150
Embodied Water, L/kg 46 to 47
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
64
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 230
190
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 18 to 21
28
Strength to Weight: Bending, points 18 to 20
33
Thermal Diffusivity, mm2/s 14
59
Thermal Shock Resistance, points 16 to 19
12