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4145 Aluminum vs. ACI-ASTM CE30 Steel

4145 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CE30 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 4145 aluminum and the bottom bar is ACI-ASTM CE30 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
200
Elongation at Break, % 2.2
11
Fatigue Strength, MPa 48
170
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 28
79
Tensile Strength: Ultimate (UTS), MPa 120
630
Tensile Strength: Yield (Proof), MPa 68
310

Thermal Properties

Latent Heat of Fusion, J/g 540
310
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 590
1410
Melting Onset (Solidus), °C 520
1360
Specific Heat Capacity, J/kg-K 880
490
Thermal Conductivity, W/m-K 100
14
Thermal Expansion, µm/m-K 21
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 84
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
19
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 7.6
3.4
Embodied Energy, MJ/kg 140
49
Embodied Water, L/kg 1040
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
59
Resilience: Unit (Modulus of Resilience), kJ/m3 31
240
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 12
23
Strength to Weight: Bending, points 19
21
Thermal Diffusivity, mm2/s 42
3.6
Thermal Shock Resistance, points 5.5
13

Alloy Composition


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Aluminum (Al), % 83 to 87.4
0
Carbon (C), % 0
0 to 0.3
Chromium (Cr), % 0 to 0.15
26 to 30
Copper (Cu), % 3.3 to 4.7
0
Iron (Fe), % 0 to 0.8
55.1 to 66
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0 to 1.5
Nickel (Ni), % 0
8.0 to 11
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 9.3 to 10.7
0 to 2.0
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0