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7049 Aluminum vs. EN 1.4020 Stainless Steel

7049 aluminum belongs to the aluminum alloys classification, while EN 1.4020 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 1.4020 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
190 to 340
Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 6.2 to 7.0
13 to 34
Fatigue Strength, MPa 160 to 170
340 to 540
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 300 to 310
510 to 680
Tensile Strength: Ultimate (UTS), MPa 510 to 530
770 to 1130
Tensile Strength: Yield (Proof), MPa 420 to 450
430 to 950

Thermal Properties

Latent Heat of Fusion, J/g 370
280
Maximum Temperature: Mechanical, °C 180
890
Melting Completion (Liquidus), °C 640
1390
Melting Onset (Solidus), °C 480
1350
Specific Heat Capacity, J/kg-K 860
480
Thermal Expansion, µm/m-K 23
17

Otherwise Unclassified Properties

Base Metal Price, % relative 10
11
Density, g/cm3 3.1
7.6
Embodied Carbon, kg CO2/kg material 8.1
2.5
Embodied Energy, MJ/kg 140
37
Embodied Water, L/kg 1110
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
140 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
460 to 2290
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 46 to 47
28 to 41
Strength to Weight: Bending, points 46 to 47
25 to 32
Thermal Shock Resistance, points 22 to 23
16 to 23

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0.1 to 0.22
16.5 to 19
Copper (Cu), % 1.2 to 1.9
0
Iron (Fe), % 0 to 0.35
62.8 to 71.8
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
11 to 14
Nickel (Ni), % 0
0.5 to 2.5
Nitrogen (N), % 0
0.2 to 0.45
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.25
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 7.2 to 8.2
0
Residuals, % 0 to 0.15
0