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ASTM A266 Carbon Steel vs. A384.0 Aluminum

ASTM A266 carbon steel belongs to the iron alloys classification, while A384.0 aluminum belongs to the aluminum 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 ASTM A266 carbon steel and the bottom bar is A384.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
74
Elongation at Break, % 21 to 26
2.5
Fatigue Strength, MPa 170 to 200
140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
28
Shear Strength, MPa 320 to 380
200
Tensile Strength: Ultimate (UTS), MPa 500 to 600
330
Tensile Strength: Yield (Proof), MPa 230 to 290
170

Thermal Properties

Latent Heat of Fusion, J/g 250
550
Maximum Temperature: Mechanical, °C 400
170
Melting Completion (Liquidus), °C 1460
610
Melting Onset (Solidus), °C 1420
510
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 51 to 52
96
Thermal Expansion, µm/m-K 12
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
23
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1 to 8.2
73

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
11
Density, g/cm3 7.8
2.8
Embodied Carbon, kg CO2/kg material 1.4
7.5
Embodied Energy, MJ/kg 18 to 19
140
Embodied Water, L/kg 46 to 47
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
6.9
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 230
180
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 18 to 21
32
Strength to Weight: Bending, points 18 to 20
38
Thermal Diffusivity, mm2/s 14
39
Thermal Shock Resistance, points 16 to 19
15