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6182 Aluminum vs. AISI 444 Stainless Steel

6182 aluminum belongs to the aluminum alloys classification, while AISI 444 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 6182 aluminum and the bottom bar is AISI 444 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 6.8 to 13
23
Fatigue Strength, MPa 63 to 99
210
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
78
Shear Strength, MPa 140 to 190
300
Tensile Strength: Ultimate (UTS), MPa 230 to 320
470
Tensile Strength: Yield (Proof), MPa 130 to 270
310

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 190
930
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 600
1420
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 160
23
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
15
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.4
3.4
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 1170
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21 to 26
95
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 520
240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 23 to 32
17
Strength to Weight: Bending, points 30 to 38
17
Thermal Diffusivity, mm2/s 65
6.2
Thermal Shock Resistance, points 10 to 14
16

Alloy Composition

Aluminum (Al), % 95 to 97.9
0
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0 to 0.25
17.5 to 19.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.5
73.3 to 80.8
Magnesium (Mg), % 0.7 to 1.2
0
Manganese (Mn), % 0.5 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 0
0 to 1.0
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.9 to 1.3
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0.2 to 0.8
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.050 to 0.2
0
Residuals, % 0 to 0.15
0