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ASTM A387 Grade 9 Steel vs. EN AC-44200 Aluminum

ASTM A387 grade 9 steel belongs to the iron alloys classification, while EN AC-44200 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 ASTM A387 grade 9 steel and the bottom bar is EN AC-44200 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
60
Elastic (Young's, Tensile) Modulus, GPa 190
72
Elongation at Break, % 20 to 21
6.2
Fatigue Strength, MPa 160 to 240
63
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
27
Tensile Strength: Ultimate (UTS), MPa 500 to 600
180
Tensile Strength: Yield (Proof), MPa 230 to 350
86

Thermal Properties

Latent Heat of Fusion, J/g 270
570
Maximum Temperature: Mechanical, °C 600
170
Melting Completion (Liquidus), °C 1460
590
Melting Onset (Solidus), °C 1410
580
Specific Heat Capacity, J/kg-K 470
910
Thermal Conductivity, W/m-K 26
130
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
35
Electrical Conductivity: Equal Weight (Specific), % IACS 10
130

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
9.5
Density, g/cm3 7.8
2.5
Embodied Carbon, kg CO2/kg material 2.1
7.7
Embodied Energy, MJ/kg 28
140
Embodied Water, L/kg 87
1050

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 110
9.1
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 310
51
Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 25
55
Strength to Weight: Axial, points 18 to 21
20
Strength to Weight: Bending, points 18 to 20
28
Thermal Diffusivity, mm2/s 6.9
59
Thermal Shock Resistance, points 14 to 17
8.4

Alloy Composition

Aluminum (Al), % 0
85.2 to 89.5
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 8.0 to 10
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 87.1 to 90.8
0 to 0.55
Manganese (Mn), % 0.3 to 0.6
0 to 0.35
Molybdenum (Mo), % 0.9 to 1.1
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 1.0
10.5 to 13.5
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0
0 to 0.15
Vanadium (V), % 0 to 0.040
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15