MakeItFrom.com
Menu (ESC)

8079 Aluminum vs. AISI 420 Stainless Steel

8079 aluminum belongs to the aluminum alloys classification, while AISI 420 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 8079 aluminum and the bottom bar is AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 2.2
8.0 to 15
Fatigue Strength, MPa 56
220 to 670
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
76
Tensile Strength: Ultimate (UTS), MPa 150
690 to 1720
Tensile Strength: Yield (Proof), MPa 120
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 400
280
Maximum Temperature: Mechanical, °C 170
620
Melting Completion (Liquidus), °C 650
1510
Melting Onset (Solidus), °C 640
1450
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 230
27
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 58
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 190
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
7.5
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.0
Embodied Energy, MJ/kg 150
28
Embodied Water, L/kg 1180
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.1
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 110
380 to 4410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 15
25 to 62
Strength to Weight: Bending, points 22
22 to 41
Thermal Diffusivity, mm2/s 92
7.3
Thermal Shock Resistance, points 6.4
25 to 62

Alloy Composition

Aluminum (Al), % 98.1 to 99.3
0
Carbon (C), % 0
0.15 to 0.4
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0.7 to 1.3
82.3 to 87.9
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
0 to 0.75
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.050 to 0.3
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0