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7049 Aluminum vs. S36200 Stainless Steel

7049 aluminum belongs to the aluminum alloys classification, while S36200 stainless steel belongs to the iron alloys. There are 30 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 7049 aluminum and the bottom bar is S36200 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.2 to 7.0
3.4 to 4.6
Fatigue Strength, MPa 160 to 170
450 to 570
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 27
76
Shear Strength, MPa 300 to 310
680 to 810
Tensile Strength: Ultimate (UTS), MPa 510 to 530
1180 to 1410
Tensile Strength: Yield (Proof), MPa 420 to 450
960 to 1240

Thermal Properties

Latent Heat of Fusion, J/g 370
280
Maximum Temperature: Mechanical, °C 180
820
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 480
1400
Specific Heat Capacity, J/kg-K 860
480
Thermal Conductivity, W/m-K 130
16
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.1
2.8
Embodied Energy, MJ/kg 140
40
Embodied Water, L/kg 1110
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
46 to 51
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
2380 to 3930
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 46 to 47
42 to 50
Strength to Weight: Bending, points 46 to 47
32 to 36
Thermal Diffusivity, mm2/s 51
4.3
Thermal Shock Resistance, points 22 to 23
40 to 48

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0 to 0.1
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0.1 to 0.22
14 to 14.5
Copper (Cu), % 1.2 to 1.9
0
Iron (Fe), % 0 to 0.35
75.4 to 79.5
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 0
6.5 to 7.0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.25
0 to 0.3
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0.6 to 0.9
Zinc (Zn), % 7.2 to 8.2
0
Residuals, % 0 to 0.15
0