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SAE-AISI 8640 Steel vs. 6262A Aluminum

SAE-AISI 8640 steel belongs to the iron alloys classification, while 6262A aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 SAE-AISI 8640 steel and the bottom bar is 6262A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 23
4.5 to 11
Fatigue Strength, MPa 270
94 to 110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 360
190 to 240
Tensile Strength: Ultimate (UTS), MPa 570
310 to 410
Tensile Strength: Yield (Proof), MPa 380
270 to 370

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 410
160
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
580
Specific Heat Capacity, J/kg-K 470
890
Thermal Conductivity, W/m-K 39
170
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
45
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
140

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
11
Density, g/cm3 7.8
2.8
Embodied Carbon, kg CO2/kg material 1.5
8.4
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 50
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
17 to 34
Resilience: Unit (Modulus of Resilience), kJ/m3 380
540 to 1000
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
49
Strength to Weight: Axial, points 20
31 to 41
Strength to Weight: Bending, points 20
36 to 44
Thermal Diffusivity, mm2/s 10
67
Thermal Shock Resistance, points 17
14 to 18

Alloy Composition

Aluminum (Al), % 0
94.2 to 97.8
Bismuth (Bi), % 0
0.4 to 0.9
Carbon (C), % 0.38 to 0.43
0
Chromium (Cr), % 0.4 to 0.6
0.040 to 0.14
Copper (Cu), % 0
0.15 to 0.4
Iron (Fe), % 96.6 to 97.8
0 to 0.7
Magnesium (Mg), % 0
0.8 to 1.2
Manganese (Mn), % 0.75 to 1.0
0 to 0.15
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.4 to 0.7
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0.4 to 0.8
Sulfur (S), % 0 to 0.040
0
Tin (Sn), % 0
0.4 to 1.0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15