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7049 Aluminum vs. EN 1.7703 Steel

7049 aluminum belongs to the aluminum alloys classification, while EN 1.7703 steel belongs to the iron alloys. There are 31 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 7049 aluminum and the bottom bar is EN 1.7703 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.2 to 7.0
20
Fatigue Strength, MPa 160 to 170
320 to 340
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
74
Shear Strength, MPa 300 to 310
420 to 430
Tensile Strength: Ultimate (UTS), MPa 510 to 530
670 to 690
Tensile Strength: Yield (Proof), MPa 420 to 450
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Maximum Temperature: Mechanical, °C 180
460
Melting Completion (Liquidus), °C 640
1470
Melting Onset (Solidus), °C 480
1430
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
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 10
4.2
Density, g/cm3 3.1
7.9
Embodied Carbon, kg CO2/kg material 8.1
2.5
Embodied Energy, MJ/kg 140
35
Embodied Water, L/kg 1110
61

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
570 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 46 to 47
24
Strength to Weight: Bending, points 46 to 47
22
Thermal Diffusivity, mm2/s 51
11
Thermal Shock Resistance, points 22 to 23
19 to 20

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Carbon (C), % 0
0.11 to 0.15
Chromium (Cr), % 0.1 to 0.22
2.0 to 2.5
Copper (Cu), % 1.2 to 1.9
0 to 0.2
Iron (Fe), % 0 to 0.35
94.6 to 96.4
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.25
0 to 0.1
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 0 to 0.1
0 to 0.030
Vanadium (V), % 0
0.25 to 0.35
Zinc (Zn), % 7.2 to 8.2
0
Residuals, % 0 to 0.15
0