MakeItFrom.com
Menu (ESC)

7108A Aluminum vs. AISI 409 Stainless Steel

7108A aluminum belongs to the aluminum alloys classification, while AISI 409 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 7108A aluminum and the bottom bar is AISI 409 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 11 to 13
24
Fatigue Strength, MPa 120 to 130
140
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
75
Shear Strength, MPa 210
270
Tensile Strength: Ultimate (UTS), MPa 350
420
Tensile Strength: Yield (Proof), MPa 290 to 300
200

Thermal Properties

Latent Heat of Fusion, J/g 380
270
Maximum Temperature: Mechanical, °C 210
710
Melting Completion (Liquidus), °C 630
1450
Melting Onset (Solidus), °C 520
1400
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 150
25
Thermal Expansion, µm/m-K 24
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 110
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
6.5
Density, g/cm3 2.9
7.7
Embodied Carbon, kg CO2/kg material 8.3
2.0
Embodied Energy, MJ/kg 150
28
Embodied Water, L/kg 1150
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38 to 44
83
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 640
100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 33 to 34
15
Strength to Weight: Bending, points 38
16
Thermal Diffusivity, mm2/s 59
6.7
Thermal Shock Resistance, points 15 to 16
15

Alloy Composition

Aluminum (Al), % 91.6 to 94.4
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0 to 0.040
10.5 to 11.7
Copper (Cu), % 0 to 0.050
0
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
84.9 to 89.5
Magnesium (Mg), % 0.7 to 1.5
0
Manganese (Mn), % 0 to 0.050
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.030
0 to 0.75
Zinc (Zn), % 4.8 to 5.8
0
Zirconium (Zr), % 0.15 to 0.25
0
Residuals, % 0 to 0.15
0