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7075 Aluminum vs. AISI 316 Stainless Steel

7075 aluminum belongs to the aluminum alloys classification, while AISI 316 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 7075 aluminum and the bottom bar is AISI 316 stainless steel.

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 1.8 to 12
8.0 to 55
Fatigue Strength, MPa 110 to 190
210 to 430
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
78
Shear Strength, MPa 150 to 340
350 to 690
Tensile Strength: Ultimate (UTS), MPa 240 to 590
520 to 1180
Tensile Strength: Yield (Proof), MPa 120 to 510
230 to 850

Thermal Properties

Melting Completion (Liquidus), °C 640
1400
Melting Onset (Solidus), °C 480
1380
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 23
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 98
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
19
Calomel Potential, mV -750
-50
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.3
3.9
Embodied Energy, MJ/kg 150
53
Embodied Water, L/kg 1120
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8 to 44
85 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 1870
130 to 1820
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 22 to 54
18 to 42
Strength to Weight: Bending, points 28 to 52
18 to 31
Thermal Diffusivity, m2/s 50
4.1
Thermal Shock Resistance, points 10 to 25
12 to 26

Alloy Composition

Aluminum (Al), % 86.9 to 91.4
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0.18 to 0.28
16 to 18.5
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 0 to 0.5
62 to 72
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.3
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
10 to 14
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 5.1 to 6.1
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0

Comparable Variants