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7175 Aluminum vs. N08926 Stainless Steel

7175 aluminum belongs to the aluminum alloys classification, while N08926 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 7175 aluminum and the bottom bar is N08926 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 3.8 to 5.9
40
Fatigue Strength, MPa 150 to 180
290
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
80
Shear Strength, MPa 290 to 330
500
Tensile Strength: Ultimate (UTS), MPa 520 to 570
740
Tensile Strength: Yield (Proof), MPa 430 to 490
330

Thermal Properties

Latent Heat of Fusion, J/g 380
300
Maximum Temperature: Mechanical, °C 180
1100
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 480
1410
Specific Heat Capacity, J/kg-K 870
460
Thermal Conductivity, W/m-K 140
12
Thermal Expansion, µm/m-K 23
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 99
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
33
Density, g/cm3 3.0
8.1
Embodied Carbon, kg CO2/kg material 8.2
6.2
Embodied Energy, MJ/kg 150
84
Embodied Water, L/kg 1130
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
240
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
270
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 48 to 52
25
Strength to Weight: Bending, points 48 to 51
22
Thermal Diffusivity, mm2/s 53
3.2
Thermal Shock Resistance, points 23 to 25
16

Alloy Composition

Aluminum (Al), % 88 to 91.4
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0.18 to 0.28
19 to 21
Copper (Cu), % 1.2 to 2.0
0.5 to 1.5
Iron (Fe), % 0 to 0.2
41.7 to 50.4
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.1
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0
24 to 26
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.15
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 5.1 to 6.1
0
Residuals, % 0 to 0.15
0