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2195 Aluminum vs. SAE-AISI 8645 Steel

2195 aluminum belongs to the aluminum alloys classification, while SAE-AISI 8645 steel belongs to the iron alloys. There are 30 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 2195 aluminum and the bottom bar is SAE-AISI 8645 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 9.3
12 to 23
Fatigue Strength, MPa 190
280 to 350
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 350
380 to 400
Tensile Strength: Ultimate (UTS), MPa 590
600 to 670
Tensile Strength: Yield (Proof), MPa 560
390 to 560

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Maximum Temperature: Mechanical, °C 210
410
Melting Completion (Liquidus), °C 660
1460
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 130
39
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 100
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 31
2.6
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.6
1.5
Embodied Energy, MJ/kg 160
20
Embodied Water, L/kg 1470
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54
77 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 2290
420 to 840
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 55
21 to 24
Strength to Weight: Bending, points 53
20 to 22
Thermal Diffusivity, mm2/s 49
10
Thermal Shock Resistance, points 26
18 to 20

Alloy Composition

Aluminum (Al), % 91.9 to 94.9
0
Carbon (C), % 0
0.43 to 0.48
Chromium (Cr), % 0
0.4 to 0.6
Copper (Cu), % 3.7 to 4.3
0
Iron (Fe), % 0 to 0.15
96.5 to 97.7
Lithium (Li), % 0.8 to 1.2
0
Magnesium (Mg), % 0.25 to 0.8
0
Manganese (Mn), % 0 to 0.25
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0
0.4 to 0.7
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.12
0.15 to 0.35
Silver (Ag), % 0.25 to 0.6
0
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0.080 to 0.16
0
Residuals, % 0 to 0.15
0