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SAE-AISI 8645 Steel vs. 413.0 Aluminum

SAE-AISI 8645 steel belongs to the iron alloys classification, while 413.0 aluminum belongs to the aluminum alloys. 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 SAE-AISI 8645 steel and the bottom bar is 413.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 200
80
Elastic (Young's, Tensile) Modulus, GPa 190
73
Elongation at Break, % 12 to 23
2.5
Fatigue Strength, MPa 280 to 350
130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
28
Shear Strength, MPa 380 to 400
170
Tensile Strength: Ultimate (UTS), MPa 600 to 670
270
Tensile Strength: Yield (Proof), MPa 390 to 560
140

Thermal Properties

Latent Heat of Fusion, J/g 250
570
Maximum Temperature: Mechanical, °C 410
170
Melting Completion (Liquidus), °C 1460
590
Melting Onset (Solidus), °C 1420
580
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 39
140
Thermal Expansion, µm/m-K 13
20

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
9.5
Density, g/cm3 7.8
2.6
Embodied Carbon, kg CO2/kg material 1.5
7.6
Embodied Energy, MJ/kg 20
140
Embodied Water, L/kg 50
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 120
5.7
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 840
130
Stiffness to Weight: Axial, points 13
16
Stiffness to Weight: Bending, points 24
53
Strength to Weight: Axial, points 21 to 24
29
Strength to Weight: Bending, points 20 to 22
36
Thermal Diffusivity, mm2/s 10
59
Thermal Shock Resistance, points 18 to 20
13

Alloy Composition

Aluminum (Al), % 0
82.2 to 89
Carbon (C), % 0.43 to 0.48
0
Chromium (Cr), % 0.4 to 0.6
0
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 96.5 to 97.7
0 to 2.0
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0.75 to 1.0
0 to 0.35
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.4 to 0.7
0 to 0.5
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
11 to 13
Sulfur (S), % 0 to 0.040
0
Tin (Sn), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.25