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6105 Aluminum vs. AISI 420 Stainless Steel

6105 aluminum belongs to the aluminum alloys classification, while AISI 420 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 6105 aluminum and the bottom bar is AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
190
Elongation at Break, % 9.0 to 16
8.0 to 15
Fatigue Strength, MPa 95 to 130
220 to 670
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
76
Shear Strength, MPa 120 to 170
420 to 1010
Tensile Strength: Ultimate (UTS), MPa 190 to 280
690 to 1720
Tensile Strength: Yield (Proof), MPa 120 to 270
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 410
280
Maximum Temperature: Mechanical, °C 160
620
Melting Completion (Liquidus), °C 650
1510
Melting Onset (Solidus), °C 600
1450
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 180 to 190
27
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46 to 50
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 150 to 170
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
7.5
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.3
2.0
Embodied Energy, MJ/kg 150
28
Embodied Water, L/kg 1180
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25 to 27
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 100 to 550
380 to 4410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
25
Strength to Weight: Axial, points 20 to 29
25 to 62
Strength to Weight: Bending, points 28 to 35
22 to 41
Thermal Diffusivity, mm2/s 72 to 79
7.3
Thermal Shock Resistance, points 8.6 to 12
25 to 62

Alloy Composition

Aluminum (Al), % 97.2 to 99
0
Carbon (C), % 0
0.15 to 0.4
Chromium (Cr), % 0 to 0.1
12 to 14
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.35
82.3 to 87.9
Magnesium (Mg), % 0.45 to 0.8
0
Manganese (Mn), % 0 to 0.1
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), % 0.6 to 1.0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0