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2618 Aluminum vs. ASTM A514 Steel

2618 aluminum belongs to the aluminum alloys classification, while ASTM A514 steel belongs to the iron alloys. 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 ASTM A514 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
240 to 250
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 5.8
18 to 21
Fatigue Strength, MPa 110
470 to 540
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 260
490 to 520
Tensile Strength: Ultimate (UTS), MPa 420
790 to 830
Tensile Strength: Yield (Proof), MPa 350
690 to 770

Thermal Properties

Latent Heat of Fusion, J/g 390
250 to 260
Maximum Temperature: Mechanical, °C 210
400 to 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
37 to 51
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
7.2 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.3 to 8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.3 to 3.8
Density, g/cm3 2.9
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 8.3
1.6 to 1.8
Embodied Energy, MJ/kg 150
21 to 25
Embodied Water, L/kg 1150
48 to 57

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23
140 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 850
1280 to 1590
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 40
28 to 29
Strength to Weight: Bending, points 42
24 to 25
Thermal Diffusivity, mm2/s 62
10 to 14
Thermal Shock Resistance, points 19
23 to 24