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2618A Aluminum vs. ASTM A372 Grade C Steel

2618A aluminum belongs to the aluminum alloys classification, while ASTM A372 grade C steel belongs to the iron alloys. There are 30 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 2618A aluminum and the bottom bar is ASTM A372 grade C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 4.5
17
Fatigue Strength, MPa 120
290
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 260
440
Tensile Strength: Ultimate (UTS), MPa 440
710
Tensile Strength: Yield (Proof), MPa 410
430

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
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 110
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
19
Embodied Water, L/kg 1150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
100
Resilience: Unit (Modulus of Resilience), kJ/m3 1180
500
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 41
25
Strength to Weight: Bending, points 44
23
Thermal Diffusivity, mm2/s 59
14
Thermal Shock Resistance, points 19
22

Alloy Composition

Aluminum (Al), % 91.5 to 95.2
0
Carbon (C), % 0
0 to 0.48
Copper (Cu), % 1.8 to 2.7
0
Iron (Fe), % 0.9 to 1.4
97.5 to 99.85
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.25
0 to 1.7
Nickel (Ni), % 0.8 to 1.4
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0.15 to 0.25
0.15 to 0.35
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.15
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0