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ASTM A387 Grade 9 Steel vs. EN AC-71100 Aluminum

ASTM A387 grade 9 steel belongs to the iron alloys classification, while EN AC-71100 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, 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 ASTM A387 grade 9 steel and the bottom bar is EN AC-71100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
110
Elastic (Young's, Tensile) Modulus, GPa 190
72
Elongation at Break, % 20 to 21
1.1
Fatigue Strength, MPa 160 to 240
150
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 75
27
Tensile Strength: Ultimate (UTS), MPa 500 to 600
260
Tensile Strength: Yield (Proof), MPa 230 to 350
230

Thermal Properties

Latent Heat of Fusion, J/g 270
490
Maximum Temperature: Mechanical, °C 600
170
Melting Completion (Liquidus), °C 1460
580
Melting Onset (Solidus), °C 1410
520
Specific Heat Capacity, J/kg-K 470
860
Thermal Expansion, µm/m-K 13
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
32
Electrical Conductivity: Equal Weight (Specific), % IACS 10
97

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
9.5
Density, g/cm3 7.8
2.9
Embodied Carbon, kg CO2/kg material 2.1
7.4
Embodied Energy, MJ/kg 28
140
Embodied Water, L/kg 87
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
2.8
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
360
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 18 to 21
25
Strength to Weight: Bending, points 18 to 20
31
Thermal Shock Resistance, points 14 to 17
12

Alloy Composition

Aluminum (Al), % 0
78.7 to 83.3
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 8.0 to 10
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 87.1 to 90.8
0 to 0.3
Magnesium (Mg), % 0
0.2 to 0.5
Manganese (Mn), % 0.3 to 0.6
0 to 0.15
Molybdenum (Mo), % 0.9 to 1.1
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 1.0
7.5 to 9.5
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
0 to 0.15
Vanadium (V), % 0 to 0.040
0
Zinc (Zn), % 0
9.0 to 10.5
Residuals, % 0
0 to 0.15