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7010 Aluminum vs. S21800 Stainless Steel

7010 aluminum belongs to the aluminum alloys classification, while S21800 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, 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 7010 aluminum and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 3.9 to 6.8
40
Fatigue Strength, MPa 160 to 190
330
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
75
Shear Strength, MPa 300 to 340
510
Tensile Strength: Ultimate (UTS), MPa 520 to 590
740
Tensile Strength: Yield (Proof), MPa 410 to 540
390

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 200
900
Melting Completion (Liquidus), °C 630
1360
Melting Onset (Solidus), °C 480
1310
Specific Heat Capacity, J/kg-K 860
500
Thermal Expansion, µm/m-K 24
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
15
Density, g/cm3 3.0
7.5
Embodied Carbon, kg CO2/kg material 8.3
3.1
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1120
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22 to 33
250
Resilience: Unit (Modulus of Resilience), kJ/m3 1230 to 2130
390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
26
Strength to Weight: Axial, points 47 to 54
27
Strength to Weight: Bending, points 47 to 52
24
Thermal Shock Resistance, points 22 to 26
17

Alloy Composition

Aluminum (Al), % 87.9 to 90.6
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0 to 0.050
16 to 18
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 0 to 0.15
59.1 to 65.4
Magnesium (Mg), % 2.1 to 2.6
0
Manganese (Mn), % 0 to 0.1
7.0 to 9.0
Nickel (Ni), % 0 to 0.050
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0 to 0.12
3.5 to 4.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.060
0
Zinc (Zn), % 5.7 to 6.7
0
Zirconium (Zr), % 0.1 to 0.16
0
Residuals, % 0 to 0.15
0