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772.0 Aluminum vs. SAE-AISI 12L14 Steel

772.0 aluminum belongs to the aluminum alloys classification, while SAE-AISI 12L14 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 772.0 aluminum and the bottom bar is SAE-AISI 12L14 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 6.3 to 8.4
11 to 25
Fatigue Strength, MPa 94 to 160
190 to 290
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
72
Tensile Strength: Ultimate (UTS), MPa 260 to 320
440 to 620
Tensile Strength: Yield (Proof), MPa 220 to 250
260 to 460

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 180
400
Melting Completion (Liquidus), °C 630
1460
Melting Onset (Solidus), °C 580
1420
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 150
51
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.0
1.4
Embodied Energy, MJ/kg 150
18
Embodied Water, L/kg 1140
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 25
64 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 350 to 430
180 to 560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 25 to 31
15 to 22
Strength to Weight: Bending, points 31 to 36
16 to 20
Thermal Diffusivity, mm2/s 58
14
Thermal Shock Resistance, points 11 to 14
14 to 20

Alloy Composition

Aluminum (Al), % 91.2 to 93.2
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0.060 to 0.2
0
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.15
97.9 to 98.7
Lead (Pb), % 0
0.15 to 0.35
Magnesium (Mg), % 0.6 to 0.8
0
Manganese (Mn), % 0 to 0.1
0.85 to 1.2
Phosphorus (P), % 0
0.040 to 0.090
Silicon (Si), % 0 to 0.15
0
Sulfur (S), % 0
0.26 to 0.35
Titanium (Ti), % 0.1 to 0.2
0
Zinc (Zn), % 6.0 to 7.0
0
Residuals, % 0 to 0.15
0