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359.0 Aluminum vs. SAE-AISI 4145 Steel

359.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI 4145 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 359.0 aluminum and the bottom bar is SAE-AISI 4145 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90 to 100
310
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 3.8 to 4.9
16
Fatigue Strength, MPa 100
240
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 220 to 230
360
Tensile Strength: Ultimate (UTS), MPa 340 to 350
580
Tensile Strength: Yield (Proof), MPa 250 to 280
360

Thermal Properties

Latent Heat of Fusion, J/g 530
250
Maximum Temperature: Mechanical, °C 170
420
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 570
1420
Specific Heat Capacity, J/kg-K 910
470
Thermal Conductivity, W/m-K 140
42
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.4
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 8.0
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1090
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 15
80
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 540
350
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 54
24
Strength to Weight: Axial, points 37 to 38
21
Strength to Weight: Bending, points 42 to 43
20
Thermal Diffusivity, mm2/s 59
11
Thermal Shock Resistance, points 16 to 17
17

Alloy Composition

Aluminum (Al), % 88.9 to 91
0
Carbon (C), % 0
0.43 to 0.48
Chromium (Cr), % 0
0.8 to 1.1
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.2
96.7 to 97.7
Magnesium (Mg), % 0.5 to 0.7
0
Manganese (Mn), % 0 to 0.1
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 8.5 to 9.5
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0