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7049 Aluminum vs. S32615 Stainless Steel

7049 aluminum belongs to the aluminum alloys classification, while S32615 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 S32615 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
170
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.2 to 7.0
28
Fatigue Strength, MPa 160 to 170
180
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 27
75
Shear Strength, MPa 300 to 310
400
Tensile Strength: Ultimate (UTS), MPa 510 to 530
620
Tensile Strength: Yield (Proof), MPa 420 to 450
250

Thermal Properties

Latent Heat of Fusion, J/g 370
370
Maximum Temperature: Mechanical, °C 180
990
Melting Completion (Liquidus), °C 640
1350
Melting Onset (Solidus), °C 480
1310
Specific Heat Capacity, J/kg-K 860
500
Thermal Expansion, µm/m-K 23
15

Otherwise Unclassified Properties

Base Metal Price, % relative 10
24
Density, g/cm3 3.1
7.6
Embodied Carbon, kg CO2/kg material 8.1
4.4
Embodied Energy, MJ/kg 140
63
Embodied Water, L/kg 1110
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
140
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 46 to 47
23
Strength to Weight: Bending, points 46 to 47
21
Thermal Shock Resistance, points 22 to 23
15

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0.1 to 0.22
16.5 to 19.5
Copper (Cu), % 1.2 to 1.9
1.5 to 2.5
Iron (Fe), % 0 to 0.35
46.4 to 57.9
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
0 to 2.0
Molybdenum (Mo), % 0
0.3 to 1.5
Nickel (Ni), % 0
19 to 22
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.25
4.8 to 6.0
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