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5056 Aluminum vs. ACI-ASTM CA15M Steel

5056 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CA15M steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, 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 5056 aluminum and the bottom bar is ACI-ASTM CA15M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
200
Elongation at Break, % 4.9 to 31
20
Fatigue Strength, MPa 140 to 200
330
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 25
76
Tensile Strength: Ultimate (UTS), MPa 290 to 460
690
Tensile Strength: Yield (Proof), MPa 150 to 410
510

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 190
760
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 570
1410
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 130
27
Thermal Expansion, µm/m-K 24
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 99
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
7.5
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 9.0
2.1
Embodied Energy, MJ/kg 150
29
Embodied Water, L/kg 1180
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 140
130
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 1220
670
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
25
Strength to Weight: Axial, points 30 to 48
25
Strength to Weight: Bending, points 36 to 50
22
Thermal Diffusivity, mm2/s 53
7.2
Thermal Shock Resistance, points 13 to 20
25

Alloy Composition

Aluminum (Al), % 93 to 95.4
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0.050 to 0.2
11.5 to 14
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.4
82.1 to 88.4
Magnesium (Mg), % 4.5 to 5.6
0
Manganese (Mn), % 0.050 to 0.2
0 to 1.0
Molybdenum (Mo), % 0
0.15 to 1.0
Nickel (Ni), % 0
0 to 1.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.3
0 to 0.65
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0