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C355.0 Aluminum vs. SAE-AISI D4 Steel

C355.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI D4 steel belongs to the iron alloys. There are 27 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 C355.0 aluminum and the bottom bar is SAE-AISI D4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 2.7 to 3.8
8.4 to 15
Fatigue Strength, MPa 76 to 84
310 to 920
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
74
Tensile Strength: Ultimate (UTS), MPa 290 to 310
760 to 2060
Tensile Strength: Yield (Proof), MPa 200 to 230
470 to 1540

Thermal Properties

Latent Heat of Fusion, J/g 470
270
Melting Completion (Liquidus), °C 620
1430
Melting Onset (Solidus), °C 570
1380
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 150
31
Thermal Expansion, µm/m-K 22
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
4.2
Electrical Conductivity: Equal Weight (Specific), % IACS 130
5.0

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
8.0
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.0
3.3
Embodied Energy, MJ/kg 150
49
Embodied Water, L/kg 1120
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.5 to 9.8
100 to 160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
25
Strength to Weight: Axial, points 30 to 32
27 to 75
Strength to Weight: Bending, points 36 to 37
24 to 47
Thermal Diffusivity, mm2/s 60
8.3
Thermal Shock Resistance, points 13 to 14
23 to 63

Alloy Composition

Aluminum (Al), % 91.7 to 94.1
0
Carbon (C), % 0
2.1 to 2.4
Chromium (Cr), % 0
11 to 13
Copper (Cu), % 1.0 to 1.5
0 to 0.25
Iron (Fe), % 0 to 0.2
80.6 to 86.3
Magnesium (Mg), % 0.4 to 0.6
0
Manganese (Mn), % 0 to 0.1
0 to 0.6
Molybdenum (Mo), % 0
0.7 to 1.2
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 4.5 to 5.5
0 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Vanadium (V), % 0
0 to 1.0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0