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7049 Aluminum vs. ASTM A387 Grade 11 Steel

7049 aluminum belongs to the aluminum alloys classification, while ASTM A387 grade 11 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 7049 aluminum and the bottom bar is ASTM A387 grade 11 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.2 to 7.0
25
Fatigue Strength, MPa 160 to 170
200 to 250
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 300 to 310
320 to 390
Tensile Strength: Ultimate (UTS), MPa 510 to 530
500 to 600
Tensile Strength: Yield (Proof), MPa 420 to 450
270 to 350

Thermal Properties

Latent Heat of Fusion, J/g 370
260
Maximum Temperature: Mechanical, °C 180
430
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 480
1420
Specific Heat Capacity, J/kg-K 860
470
Thermal Conductivity, W/m-K 130
39
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.9
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.1
1.6
Embodied Energy, MJ/kg 140
21
Embodied Water, L/kg 1110
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
100 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
200 to 320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 46 to 47
18 to 21
Strength to Weight: Bending, points 46 to 47
18 to 20
Thermal Diffusivity, mm2/s 51
11
Thermal Shock Resistance, points 22 to 23
15 to 18

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Carbon (C), % 0
0.050 to 0.17
Chromium (Cr), % 0.1 to 0.22
1.0 to 1.5
Copper (Cu), % 1.2 to 1.9
0
Iron (Fe), % 0 to 0.35
96.2 to 97.6
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
0.4 to 0.65
Molybdenum (Mo), % 0
0.45 to 0.65
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.25
0.5 to 0.8
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 7.2 to 8.2
0
Residuals, % 0 to 0.15
0