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SAE-AISI 1345 Steel vs. 3102 Aluminum

SAE-AISI 1345 steel belongs to the iron alloys classification, while 3102 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 1345 steel and the bottom bar is 3102 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 11 to 23
23 to 28
Fatigue Strength, MPa 230 to 390
31 to 34
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
26
Shear Strength, MPa 370 to 440
58 to 65
Tensile Strength: Ultimate (UTS), MPa 590 to 730
92 to 100
Tensile Strength: Yield (Proof), MPa 330 to 620
28 to 34

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 400
180
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1410
640
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 51
230
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
56
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
190

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
9.0
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.4
8.2
Embodied Energy, MJ/kg 19
150
Embodied Water, L/kg 48
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 120
16 to 22
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 1040
5.8 to 8.3
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 21 to 26
9.4 to 10
Strength to Weight: Bending, points 20 to 23
17 to 18
Thermal Diffusivity, mm2/s 14
92
Thermal Shock Resistance, points 19 to 23
4.1 to 4.4

Alloy Composition

Aluminum (Al), % 0
97.9 to 99.95
Carbon (C), % 0.43 to 0.48
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 97.2 to 97.8
0 to 0.7
Manganese (Mn), % 1.6 to 1.9
0.050 to 0.4
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0.15 to 0.35
0 to 0.4
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.15

Comparable Variants