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1080A Aluminum vs. ASTM A387 Grade 9 Steel

1080A aluminum belongs to the aluminum alloys classification, while ASTM A387 grade 9 steel belongs to the iron alloys. There are 31 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 1080A aluminum and the bottom bar is ASTM A387 grade 9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 18 to 40
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 68
190
Elongation at Break, % 2.3 to 34
20 to 21
Fatigue Strength, MPa 18 to 50
160 to 240
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
75
Shear Strength, MPa 49 to 81
310 to 380
Tensile Strength: Ultimate (UTS), MPa 74 to 140
500 to 600
Tensile Strength: Yield (Proof), MPa 17 to 120
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 170
600
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 640
1410
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 230
26
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 62
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 200
10

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
6.5
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.3
2.1
Embodied Energy, MJ/kg 160
28
Embodied Water, L/kg 1200
87

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.1 to 19
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 2.1 to 100
140 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 7.6 to 15
18 to 21
Strength to Weight: Bending, points 14 to 22
18 to 20
Thermal Diffusivity, mm2/s 94
6.9
Thermal Shock Resistance, points 3.3 to 6.4
14 to 17

Alloy Composition

Aluminum (Al), % 99.8 to 100
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
8.0 to 10
Copper (Cu), % 0 to 0.030
0
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.15
87.1 to 90.8
Magnesium (Mg), % 0 to 0.020
0
Manganese (Mn), % 0 to 0.020
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.15
0 to 1.0
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.020
0
Vanadium (V), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.060
0

Comparable Variants