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SAE-AISI 1080 Steel vs. 1230A Aluminum

SAE-AISI 1080 steel belongs to the iron alloys classification, while 1230A aluminum belongs to the aluminum 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 SAE-AISI 1080 steel and the bottom bar is 1230A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 11
4.5 to 34
Fatigue Strength, MPa 300 to 360
35 to 74
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72
26
Shear Strength, MPa 460 to 520
59 to 99
Tensile Strength: Ultimate (UTS), MPa 770 to 870
89 to 170
Tensile Strength: Yield (Proof), MPa 480 to 590
29 to 150

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 400
170
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 9.6
60
Electrical Conductivity: Equal Weight (Specific), % IACS 11
200

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
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 46
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80 to 84
6.4 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 920
5.9 to 150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 27 to 31
9.1 to 17
Strength to Weight: Bending, points 24 to 26
16 to 25
Thermal Diffusivity, mm2/s 14
93
Thermal Shock Resistance, points 25 to 29
4.0 to 7.6

Alloy Composition

Aluminum (Al), % 0
99.3 to 100
Carbon (C), % 0.75 to 0.88
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 98.1 to 98.7
0 to 0.7
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0.6 to 0.9
0 to 0.050
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0 to 0.7
Sulfur (S), % 0 to 0.050
0
Zinc (Zn), % 0
0 to 0.050